diff --git a/.github/workflows/rust.yaml b/.github/workflows/rust.yaml
index 0dd21f7..42a5e5a 100644
--- a/.github/workflows/rust.yaml
+++ b/.github/workflows/rust.yaml
@@ -2,9 +2,9 @@ name: Rust
 
 on:
   push:
-    branches: [ main ]
+    branches: [ master ]
   pull_request:
-    branches: [ main ]
+    branches: [ master ]
 
 env:
   CARGO_TERM_COLOR: always
@@ -15,10 +15,10 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-    - uses: actions/checkout@v6
+    - uses: actions/checkout@v2
     - name: Format
-      run: cargo fmt --all -- --check
+      run: cargo fmt -- --check
     - name: Lint
-      run: cargo clippy --workspace --all-targets --all-features -- -D warnings
+      run: cargo clippy --all --all-targets --all-features -- -D warnings
     - name: Run tests
       run: make check-all
diff --git a/.gitignore b/.gitignore
index 16a95ad..2f7896d 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,3 +1 @@
 target/
-/.direnv/
-/.envrc
diff --git a/.lohr b/.lohr
deleted file mode 100644
index 5e1301b..0000000
--- a/.lohr
+++ /dev/null
@@ -1,3 +0,0 @@
-git@github.com:alarsyo/advent-of-code
-git@gitlab.com:alarsyo/advent-of-code
-git@git.sr.ht:~alarsyo/advent-of-code
diff --git a/Cargo.lock b/Cargo.lock
index 77d7393..6af7b11 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -1,42 +1,10 @@
 # This file is automatically @generated by Cargo.
 # It is not intended for manual editing.
-version = 4
-
-[[package]]
-name = "aho-corasick"
-version = "1.1.4"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ddd31a130427c27518df266943a5308ed92d4b226cc639f5a8f1002816174301"
-dependencies = [
- "memchr",
-]
-
-[[package]]
-name = "alloca"
-version = "0.4.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e5a7d05ea6aea7e9e64d25b9156ba2fee3fdd659e34e41063cd2fc7cd020d7f4"
-dependencies = [
- "cc",
-]
-
-[[package]]
-name = "anes"
-version = "0.1.6"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "4b46cbb362ab8752921c97e041f5e366ee6297bd428a31275b9fcf1e380f7299"
-
-[[package]]
-name = "anstyle"
-version = "1.0.13"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5192cca8006f1fd4f7237516f40fa183bb07f8fbdfedaa0036de5ea9b0b45e78"
-
 [[package]]
 name = "anyhow"
-version = "1.0.100"
+version = "1.0.35"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a23eb6b1614318a8071c9b2521f36b424b2c83db5eb3a0fead4a6c0809af6e61"
+checksum = "2c0df63cb2955042487fad3aefd2c6e3ae7389ac5dc1beb28921de0b69f779d4"
 
 [[package]]
 name = "aoc"
@@ -59,7 +27,7 @@ name = "aoc2015_bench"
 version = "0.1.0"
 dependencies = [
  "aoc2015",
- "criterion 0.3.6",
+ "criterion",
 ]
 
 [[package]]
@@ -75,7 +43,7 @@ name = "aoc2018_bench"
 version = "0.1.0"
 dependencies = [
  "aoc2018",
- "criterion 0.3.6",
+ "criterion",
 ]
 
 [[package]]
@@ -91,7 +59,7 @@ name = "aoc2019_bench"
 version = "0.1.0"
 dependencies = [
  "aoc2019",
- "criterion 0.3.6",
+ "criterion",
 ]
 
 [[package]]
@@ -100,7 +68,7 @@ version = "0.1.0"
 dependencies = [
  "anyhow",
  "aoc",
- "itertools 0.9.0",
+ "itertools",
  "nom",
 ]
 
@@ -109,53 +77,14 @@ name = "aoc2020_bench"
 version = "0.1.0"
 dependencies = [
  "aoc2020",
- "criterion 0.3.6",
+ "criterion",
 ]
 
 [[package]]
-name = "aoc2021"
-version = "0.1.0"
-dependencies = [
- "anyhow",
- "aoc",
- "bitvec",
- "rand",
-]
-
-[[package]]
-name = "aoc2021_bench"
-version = "0.1.0"
-dependencies = [
- "aoc2021",
- "criterion 0.3.6",
-]
-
-[[package]]
-name = "aoc2022"
-version = "0.1.0"
-dependencies = [
- "anyhow",
- "aoc",
- "criterion 0.4.0",
-]
-
-[[package]]
-name = "aoc2023"
-version = "0.1.0"
-dependencies = [
- "anyhow",
- "aoc",
- "criterion 0.4.0",
-]
-
-[[package]]
-name = "aoc2025"
-version = "0.1.0"
-dependencies = [
- "anyhow",
- "aoc",
- "criterion 0.8.0",
-]
+name = "arrayvec"
+version = "0.5.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "23b62fc65de8e4e7f52534fb52b0f3ed04746ae267519eef2a83941e8085068b"
 
 [[package]]
 name = "atty"
@@ -170,21 +99,21 @@ dependencies = [
 
 [[package]]
 name = "autocfg"
-version = "1.5.0"
+version = "1.0.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c08606f8c3cbf4ce6ec8e28fb0014a2c086708fe954eaa885384a6165172e7e8"
+checksum = "cdb031dd78e28731d87d56cc8ffef4a8f36ca26c38fe2de700543e627f8a464a"
 
 [[package]]
 name = "bitflags"
-version = "1.3.2"
+version = "1.2.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "bef38d45163c2f1dde094a7dfd33ccf595c92905c8f8f4fdc18d06fb1037718a"
+checksum = "cf1de2fe8c75bc145a2f577add951f8134889b4795d47466a54a5c846d691693"
 
 [[package]]
 name = "bitvec"
-version = "1.0.1"
+version = "0.19.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1bc2832c24239b0141d5674bb9174f9d68a8b5b3f2753311927c172ca46f7e9c"
+checksum = "a7ba35e9565969edb811639dbebfe34edc0368e472c5018474c8eb2543397f81"
 dependencies = [
  "funty",
  "radium",
@@ -214,10 +143,22 @@ dependencies = [
 ]
 
 [[package]]
-name = "bumpalo"
-version = "3.19.0"
+name = "bstr"
+version = "0.2.14"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "46c5e41b57b8bba42a04676d81cb89e9ee8e859a1a66f80a5a72e1cb76b34d43"
+checksum = "473fc6b38233f9af7baa94fb5852dca389e3d95b8e21c8e3719301462c5d9faf"
+dependencies = [
+ "lazy_static",
+ "memchr",
+ "regex-automata",
+ "serde",
+]
+
+[[package]]
+name = "bumpalo"
+version = "3.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2e8c087f005730276d1096a652e92a8bacee2e2472bcc9715a74d2bec38b5820"
 
 [[package]]
 name = "byte-tools"
@@ -227,128 +168,60 @@ checksum = "e3b5ca7a04898ad4bcd41c90c5285445ff5b791899bb1b0abdd2a2aa791211d7"
 
 [[package]]
 name = "byteorder"
-version = "1.5.0"
+version = "1.3.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1fd0f2584146f6f2ef48085050886acf353beff7305ebd1ae69500e27c67f64b"
+checksum = "08c48aae112d48ed9f069b33538ea9e3e90aa263cfa3d1c24309612b1f7472de"
 
 [[package]]
 name = "cast"
-version = "0.3.0"
+version = "0.2.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "37b2a672a2cb129a2e41c10b1224bb368f9f37a2b16b612598138befd7b37eb5"
-
-[[package]]
-name = "cc"
-version = "1.2.48"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c481bdbf0ed3b892f6f806287d72acd515b352a4ec27a208489b8c1bc839633a"
+checksum = "4b9434b9a5aa1450faa3f9cb14ea0e8c53bb5d2b3c1bfd1ab4fc03e9f33fbfb0"
 dependencies = [
- "find-msvc-tools",
- "shlex",
+ "rustc_version",
 ]
 
 [[package]]
 name = "cfg-if"
-version = "1.0.4"
+version = "0.1.10"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9330f8b2ff13f34540b44e946ef35111825727b38d33286ef986142615121801"
+checksum = "4785bdd1c96b2a846b2bd7cc02e86b6b3dbf14e7e53446c4f54c92a361040822"
 
 [[package]]
-name = "ciborium"
-version = "0.2.2"
+name = "cfg-if"
+version = "1.0.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "42e69ffd6f0917f5c029256a24d0161db17cea3997d185db0d35926308770f0e"
-dependencies = [
- "ciborium-io",
- "ciborium-ll",
- "serde",
-]
-
-[[package]]
-name = "ciborium-io"
-version = "0.2.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "05afea1e0a06c9be33d539b876f1ce3692f4afea2cb41f740e7743225ed1c757"
-
-[[package]]
-name = "ciborium-ll"
-version = "0.2.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "57663b653d948a338bfb3eeba9bb2fd5fcfaecb9e199e87e1eda4d9e8b240fd9"
-dependencies = [
- "ciborium-io",
- "half 2.7.1",
-]
+checksum = "baf1de4339761588bc0619e3cbc0120ee582ebb74b53b4efbf79117bd2da40fd"
 
 [[package]]
 name = "clap"
-version = "2.34.0"
+version = "2.33.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a0610544180c38b88101fecf2dd634b174a62eef6946f84dfc6a7127512b381c"
+checksum = "37e58ac78573c40708d45522f0d80fa2f01cc4f9b4e2bf749807255454312002"
 dependencies = [
  "bitflags",
- "textwrap 0.11.0",
+ "textwrap",
  "unicode-width",
 ]
 
 [[package]]
-name = "clap"
-version = "3.2.25"
+name = "const_fn"
+version = "0.4.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "4ea181bf566f71cb9a5d17a59e1871af638180a18fb0035c92ae62b705207123"
-dependencies = [
- "bitflags",
- "clap_lex 0.2.4",
- "indexmap",
- "textwrap 0.16.2",
-]
-
-[[package]]
-name = "clap"
-version = "4.5.53"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c9e340e012a1bf4935f5282ed1436d1489548e8f72308207ea5df0e23d2d03f8"
-dependencies = [
- "clap_builder",
-]
-
-[[package]]
-name = "clap_builder"
-version = "4.5.53"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d76b5d13eaa18c901fd2f7fca939fefe3a0727a953561fefdf3b2922b8569d00"
-dependencies = [
- "anstyle",
- "clap_lex 0.7.6",
-]
-
-[[package]]
-name = "clap_lex"
-version = "0.2.4"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "2850f2f5a82cbf437dd5af4d49848fbdfc27c157c3d010345776f952765261c5"
-dependencies = [
- "os_str_bytes",
-]
-
-[[package]]
-name = "clap_lex"
-version = "0.7.6"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a1d728cc89cf3aee9ff92b05e62b19ee65a02b5702cff7d5a377e32c6ae29d8d"
+checksum = "cd51eab21ab4fd6a3bf889e2d0958c0a6e3a61ad04260325e919e652a2a62826"
 
 [[package]]
 name = "criterion"
-version = "0.3.6"
+version = "0.3.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b01d6de93b2b6c65e17c634a26653a29d107b3c98c607c765bf38d041531cd8f"
+checksum = "70daa7ceec6cf143990669a04c7df13391d55fb27bd4079d252fca774ba244d8"
 dependencies = [
  "atty",
  "cast",
- "clap 2.34.0",
- "criterion-plot 0.4.5",
+ "clap",
+ "criterion-plot",
  "csv",
- "itertools 0.10.5",
+ "itertools",
  "lazy_static",
  "num-traits",
  "oorandom",
@@ -363,134 +236,80 @@ dependencies = [
  "walkdir",
 ]
 
-[[package]]
-name = "criterion"
-version = "0.4.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e7c76e09c1aae2bc52b3d2f29e13c6572553b30c4aa1b8a49fd70de6412654cb"
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- "anes",
- "atty",
- "cast",
- "ciborium",
- "clap 3.2.25",
- "criterion-plot 0.5.0",
- "itertools 0.10.5",
- "lazy_static",
- "num-traits",
- "oorandom",
- "rayon",
- "regex",
- "serde",
- "serde_derive",
- "serde_json",
- "tinytemplate",
- "walkdir",
-]
-
-[[package]]
-name = "criterion"
-version = "0.8.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a0dfe5e9e71bdcf4e4954f7d14da74d1cdb92a3a07686452d1509652684b1aab"
-dependencies = [
- "alloca",
- "anes",
- "cast",
- "ciborium",
- "clap 4.5.53",
- "criterion-plot 0.8.0",
- "itertools 0.13.0",
- "num-traits",
- "oorandom",
- "page_size",
- "plotters",
- "rayon",
- "regex",
- "serde",
- "serde_json",
- "tinytemplate",
- "walkdir",
-]
-
 [[package]]
 name = "criterion-plot"
-version = "0.4.5"
+version = "0.4.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "2673cc8207403546f45f5fd319a974b1e6983ad1a3ee7e6041650013be041876"
+checksum = "e022feadec601fba1649cfa83586381a4ad31c6bf3a9ab7d408118b05dd9889d"
 dependencies = [
  "cast",
- "itertools 0.10.5",
+ "itertools",
 ]
 
 [[package]]
-name = "criterion-plot"
+name = "crossbeam-channel"
 version = "0.5.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "6b50826342786a51a89e2da3a28f1c32b06e387201bc2d19791f622c673706b1"
+checksum = "dca26ee1f8d361640700bde38b2c37d8c22b3ce2d360e1fc1c74ea4b0aa7d775"
 dependencies = [
- "cast",
- "itertools 0.10.5",
-]
-
-[[package]]
-name = "criterion-plot"
-version = "0.8.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5de36c2bee19fba779808f92bf5d9b0fa5a40095c277aba10c458a12b35d21d6"
-dependencies = [
- "cast",
- "itertools 0.13.0",
+ "cfg-if 1.0.0",
+ "crossbeam-utils",
 ]
 
 [[package]]
 name = "crossbeam-deque"
-version = "0.8.6"
+version = "0.8.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9dd111b7b7f7d55b72c0a6ae361660ee5853c9af73f70c3c2ef6858b950e2e51"
+checksum = "94af6efb46fef72616855b036a624cf27ba656ffc9be1b9a3c931cfc7749a9a9"
 dependencies = [
+ "cfg-if 1.0.0",
  "crossbeam-epoch",
  "crossbeam-utils",
 ]
 
 [[package]]
 name = "crossbeam-epoch"
-version = "0.9.18"
+version = "0.9.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5b82ac4a3c2ca9c3460964f020e1402edd5753411d7737aa39c3714ad1b5420e"
+checksum = "a1aaa739f95311c2c7887a76863f500026092fb1dce0161dab577e559ef3569d"
 dependencies = [
+ "cfg-if 1.0.0",
+ "const_fn",
  "crossbeam-utils",
+ "lazy_static",
+ "memoffset",
+ "scopeguard",
 ]
 
 [[package]]
 name = "crossbeam-utils"
-version = "0.8.21"
+version = "0.8.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d0a5c400df2834b80a4c3327b3aad3a4c4cd4de0629063962b03235697506a28"
-
-[[package]]
-name = "crunchy"
-version = "0.2.4"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "460fbee9c2c2f33933d720630a6a0bac33ba7053db5344fac858d4b8952d77d5"
+checksum = "02d96d1e189ef58269ebe5b97953da3274d83a93af647c2ddd6f9dab28cedb8d"
+dependencies = [
+ "autocfg",
+ "cfg-if 1.0.0",
+ "lazy_static",
+]
 
 [[package]]
 name = "csv"
-version = "1.4.0"
+version = "1.1.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "52cd9d68cf7efc6ddfaaee42e7288d3a99d613d4b50f76ce9827ae0c6e14f938"
+checksum = "f9d58633299b24b515ac72a3f869f8b91306a3cec616a602843a383acd6f9e97"
 dependencies = [
+ "bstr",
  "csv-core",
  "itoa",
  "ryu",
- "serde_core",
+ "serde",
 ]
 
 [[package]]
 name = "csv-core"
-version = "0.1.13"
+version = "0.1.10"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "704a3c26996a80471189265814dbc2c257598b96b8a7feae2d31ace646bb9782"
+checksum = "2b2466559f260f48ad25fe6317b3c8dac77b5bdb5763ac7d9d6103530663bc90"
 dependencies = [
  "memchr",
 ]
@@ -506,84 +325,40 @@ dependencies = [
 
 [[package]]
 name = "either"
-version = "1.15.0"
+version = "1.6.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "48c757948c5ede0e46177b7add2e67155f70e33c07fea8284df6576da70b3719"
-
-[[package]]
-name = "find-msvc-tools"
-version = "0.1.5"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "3a3076410a55c90011c298b04d0cfa770b00fa04e1e3c97d3f6c9de105a03844"
+checksum = "e78d4f1cc4ae33bbfc157ed5d5a5ef3bc29227303d595861deb238fcec4e9457"
 
 [[package]]
 name = "funty"
-version = "2.0.0"
+version = "1.0.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e6d5a32815ae3f33302d95fdcb2ce17862f8c65363dcfd29360480ba1001fc9c"
+checksum = "0ba62103ce691c2fd80fbae2213dfdda9ce60804973ac6b6e97de818ea7f52c8"
 
 [[package]]
 name = "generic-array"
-version = "0.12.4"
+version = "0.12.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ffdf9f34f1447443d37393cc6c2b8313aebddcd96906caf34e54c68d8e57d7bd"
+checksum = "c68f0274ae0e023facc3c97b2e00f076be70e254bc851d972503b328db79b2ec"
 dependencies = [
  "typenum",
 ]
 
-[[package]]
-name = "getrandom"
-version = "0.2.16"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "335ff9f135e4384c8150d6f27c6daed433577f86b4750418338c01a1a2528592"
-dependencies = [
- "cfg-if",
- "libc",
- "wasi",
-]
-
 [[package]]
 name = "half"
-version = "1.8.3"
+version = "1.6.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1b43ede17f21864e81be2fa654110bf1e793774238d86ef8555c37e6519c0403"
-
-[[package]]
-name = "half"
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-source = "registry+https://github.com/rust-lang/crates.io-index"
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+checksum = "d36fab90f82edc3c747f9d438e06cf0a491055896f2a279638bb5beed6c40177"
 
 [[package]]
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-checksum = "62b467343b94ba476dcb2500d242dadbb39557df889310ac77c5d99100aaac33"
+checksum = "5aca5565f760fb5b220e499d72710ed156fdb74e631659e99377d9ebfbd13ae8"
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-dependencies = [
- "autocfg",
- "hashbrown",
-]
-
 [[package]]
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@@ -593,51 +368,54 @@ dependencies = [
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-[[package]]
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-dependencies = [
- "either",
-]
-
 [[package]]
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+version = "0.4.6"
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-checksum = "4a5f13b858c8d314ee3e8f639011f7ccefe71f97f96e50151fb991f267928e2c"
+checksum = "dc6f3ad7b9d11a0c00842ff8de1b60ee58661048eb8049ed33c73594f359d7e6"
 
 [[package]]
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-checksum = "464a3709c7f55f1f721e5389aa6ea4e3bc6aba669353300af094b29ffbdde1d8"
+checksum = "cf3d7383929f7c9c7c2d0fa596f325832df98c3704f2c60553080f7127a58175"
 dependencies = [
- "once_cell",
  "wasm-bindgen",
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 [[package]]
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+checksum = "e2abad23fbc42b3700f2f279844dc832adb2b2eb069b2df918f455c4e18cc646"
+
+[[package]]
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+checksum = "db65c6da02e61f55dae90a0ae427b2a5f6b3e8db09f58d10efab23af92592616"
+dependencies = [
+ "arrayvec",
+ "bitflags",
+ "cfg-if 0.1.10",
+ "ryu",
+ "static_assertions",
+]
 
 [[package]]
 name = "libc"
-version = "0.2.177"
+version = "0.2.81"
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-checksum = "2874a2af47a2325c2001a6e6fad9b16a53b802102b528163885171cf92b15976"
+checksum = "1482821306169ec4d07f6aca392a4681f66c75c9918aa49641a2595db64053cb"
+
+[[package]]
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+checksum = "4fabed175da42fed1fa0746b0ea71f412aa9d35e76e95e59b192c64b9dc2bf8b"
+dependencies = [
+ "cfg-if 0.1.10",
+]
 
 [[package]]
 name = "md-5"
@@ -652,46 +430,55 @@ dependencies = [
 
 [[package]]
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-version = "2.7.6"
+version = "2.3.4"
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-checksum = "f52b00d39961fc5b2736ea853c9cc86238e165017a493d1d5c8eac6bdc4cc273"
+checksum = "0ee1c47aaa256ecabcaea351eae4a9b01ef39ed810004e298d2511ed284b1525"
 
 [[package]]
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+name = "memoffset"
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- "minimal-lexical",
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-checksum = "071dfc062690e90b734c0b2273ce72ad0ffa95f0c74596bc250dcfd960262841"
+checksum = "157b4208e3059a8f9e78d559edc658e13df41410cb3ae03979c83130067fdd87"
 dependencies = [
  "autocfg",
 ]
 
 [[package]]
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+name = "nom"
+version = "6.0.1"
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-checksum = "42f5e15c9953c5e4ccceeb2e7382a716482c34515315f7b03532b8b4e8393d2d"
+checksum = "88034cfd6b4a0d54dd14f4a507eceee36c0b70e5a02236c4e4df571102be17f0"
+dependencies = [
+ "bitvec",
+ "lexical-core",
+ "memchr",
+ "version_check",
+]
+
+[[package]]
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+version = "0.2.14"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9a64b1ec5cda2586e284722486d802acf1f7dbdc623e2bfc57e65ca1cd099290"
+dependencies = [
+ "autocfg",
+]
+
+[[package]]
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+version = "1.13.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "05499f3756671c15885fee9034446956fff3f243d6077b91e5767df161f766b3"
+dependencies = [
+ "hermit-abi",
+ "libc",
+]
 
 [[package]]
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-version = "11.1.5"
+version = "11.1.3"
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-checksum = "d6790f58c7ff633d8771f42965289203411a5e5c68388703c06e14f24770b41e"
+checksum = "0ab1bc2a289d34bd04a330323ac98a1b4bc82c9d9fcb1e66b63caa84da26b575"
 
 [[package]]
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@@ -699,173 +486,105 @@ version = "0.2.3"
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-
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-dependencies = [
- "libc",
- "winapi",
-]
-
 [[package]]
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+version = "0.2.15"
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-checksum = "5aeb6f403d7a4911efb1e33402027fc44f29b5bf6def3effcc22d7bb75f2b747"
+checksum = "0d1685fbe7beba33de0330629da9d955ac75bd54f33d7b79f9a895590124f6bb"
 dependencies = [
+ "js-sys",
  "num-traits",
- "plotters-backend",
- "plotters-svg",
  "wasm-bindgen",
  "web-sys",
 ]
 
-[[package]]
-name = "plotters-backend"
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-dependencies = [
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-]
-
 [[package]]
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+checksum = "1e0704ee1a7e00d7bb417d0770ea303c1bccbabf0ef1667dae92b5967f5f8a71"
 dependencies = [
- "unicode-ident",
+ "unicode-xid",
 ]
 
 [[package]]
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-version = "1.0.42"
+version = "1.0.7"
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-checksum = "a338cc41d27e6cc6dce6cefc13a0729dfbb81c262b1f519331575dd80ef3067f"
+checksum = "aa563d17ecb180e500da1cfd2b028310ac758de548efdd203e18f283af693f37"
 dependencies = [
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 [[package]]
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- "rand_core",
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-dependencies = [
- "getrandom",
-]
+checksum = "941ba9d78d8e2f7ce474c015eea4d9c6d25b6a3327f9832ee29a4de27f91bbb8"
 
 [[package]]
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-checksum = "368f01d005bf8fd9b1206fb6fa653e6c4a81ceb1466406b81792d87c5677a58f"
+checksum = "8b0d8e0819fadc20c74ea8373106ead0600e3a67ef1fe8da56e39b9ae7275674"
 dependencies = [
+ "autocfg",
+ "crossbeam-deque",
  "either",
  "rayon-core",
 ]
 
 [[package]]
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-version = "1.13.0"
+version = "1.9.0"
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+checksum = "9ab346ac5921dc62ffa9f89b7a773907511cdfa5490c572ae9be1be33e8afa4a"
 dependencies = [
+ "crossbeam-channel",
  "crossbeam-deque",
  "crossbeam-utils",
+ "lazy_static",
+ "num_cpus",
 ]
 
 [[package]]
 name = "regex"
-version = "1.12.2"
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+checksum = "38cf2c13ed4745de91a5eb834e11c00bcc3709e773173b2ce4c56c9fbde04b9c"
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- "memchr",
- "regex-automata",
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 ]
 
 [[package]]
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+version = "0.1.9"
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-checksum = "5276caf25ac86c8d810222b3dbb938e512c55c6831a10f3e6ed1c93b84041f1c"
+checksum = "ae1ded71d66a4a97f5e961fd0cb25a5f366a42a41570d16a763a69c092c26ae4"
 dependencies = [
- "aho-corasick",
- "memchr",
- "regex-syntax",
+ "byteorder",
 ]
 
 [[package]]
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-version = "0.8.8"
+version = "0.6.21"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7a2d987857b319362043e95f5353c0535c1f58eec5336fdfcf626430af7def58"
+checksum = "3b181ba2dcf07aaccad5448e8ead58db5b742cf85dfe035e2227f137a539a189"
 
 [[package]]
-name = "rustversion"
-version = "1.0.22"
+name = "rustc_version"
+version = "0.2.3"
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-checksum = "b39cdef0fa800fc44525c84ccb54a029961a8215f9619753635a9c0d2538d46d"
+checksum = "138e3e0acb6c9fb258b19b67cb8abd63c00679d2851805ea151465464fe9030a"
+dependencies = [
+ "semver",
+]
 
 [[package]]
 name = "ryu"
-version = "1.0.20"
+version = "1.0.5"
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-checksum = "28d3b2b1366ec20994f1fd18c3c594f05c5dd4bc44d8bb0c1c632c8d6829481f"
+checksum = "71d301d4193d031abdd79ff7e3dd721168a9572ef3fe51a1517aba235bd8f86e"
 
 [[package]]
 name = "same-file"
@@ -877,39 +596,47 @@ dependencies = [
 ]
 
 [[package]]
-name = "serde"
-version = "1.0.228"
+name = "scopeguard"
+version = "1.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9a8e94ea7f378bd32cbbd37198a4a91436180c5bb472411e48b5ec2e2124ae9e"
+checksum = "d29ab0c6d3fc0ee92fe66e2d99f700eab17a8d57d1c1d3b748380fb20baa78cd"
+
+[[package]]
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+version = "0.9.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1d7eb9ef2c18661902cc47e535f9bc51b78acd254da71d375c2f6720d9a40403"
 dependencies = [
- "serde_core",
- "serde_derive",
+ "semver-parser",
 ]
 
 [[package]]
-name = "serde_cbor"
-version = "0.11.2"
+name = "semver-parser"
+version = "0.7.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "2bef2ebfde456fb76bbcf9f59315333decc4fda0b2b44b420243c11e0f5ec1f5"
+checksum = "388a1df253eca08550bef6c72392cfe7c30914bf41df5269b68cbd6ff8f570a3"
+
+[[package]]
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+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "06c64263859d87aa2eb554587e2d23183398d617427327cf2b3d0ed8c69e4800"
+
+[[package]]
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+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1e18acfa2f90e8b735b2836ab8d538de304cbb6729a7360729ea5a895d15a622"
 dependencies = [
- "half 1.8.3",
+ "half",
  "serde",
 ]
 
-[[package]]
-name = "serde_core"
-version = "1.0.228"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "41d385c7d4ca58e59fc732af25c3983b67ac852c1a25000afe1175de458b67ad"
-dependencies = [
- "serde_derive",
-]
-
 [[package]]
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-checksum = "d540f220d3187173da220f885ab66608367b6574e925011a9353e4badda91d79"
+checksum = "c84d3526699cd55261af4b941e4e725444df67aa4f9e6a3564f18030d12672df"
 dependencies = [
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  "quote",
@@ -918,39 +645,37 @@ dependencies = [
 
 [[package]]
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-version = "1.0.145"
+version = "1.0.60"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "402a6f66d8c709116cf22f558eab210f5a50187f702eb4d7e5ef38d9a7f1c79c"
+checksum = "1500e84d27fe482ed1dc791a56eddc2f230046a040fa908c08bda1d9fb615779"
 dependencies = [
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- "memchr",
  "ryu",
  "serde",
- "serde_core",
 ]
 
 [[package]]
-name = "shlex"
-version = "1.3.0"
+name = "static_assertions"
+version = "1.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "0fda2ff0d084019ba4d7c6f371c95d8fd75ce3524c3cb8fb653a3023f6323e64"
+checksum = "a2eb9349b6444b326872e140eb1cf5e7c522154d69e7a0ffb0fb81c06b37543f"
 
 [[package]]
 name = "syn"
-version = "2.0.111"
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 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "390cc9a294ab71bdb1aa2e99d13be9c753cd2d7bd6560c77118597410c4d2e87"
+checksum = "9a2af957a63d6bd42255c359c93d9bfdb97076bd3b820897ce55ffbfbf107f44"
 dependencies = [
  "proc-macro2",
  "quote",
- "unicode-ident",
+ "unicode-xid",
 ]
 
 [[package]]
 name = "tap"
-version = "1.0.1"
+version = "1.0.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "55937e1799185b12863d447f42597ed69d9928686b8d88a1df17376a097d8369"
+checksum = "36474e732d1affd3a6ed582781b3683df3d0563714c59c39591e8ff707cf078e"
 
 [[package]]
 name = "textwrap"
@@ -961,17 +686,11 @@ dependencies = [
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 ]
 
-[[package]]
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-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c13547615a44dc9c452a8a534638acdf07120d4b6847c8178705da06306a3057"
-
 [[package]]
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-version = "1.2.1"
+version = "1.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "be4d6b5f19ff7664e8c98d03e2139cb510db9b0a60b55f8e8709b689d939b6bc"
+checksum = "6d3dc76004a03cec1c5932bca4cdc2e39aaa798e3f82363dd94f9adf6098c12f"
 dependencies = [
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  "serde_json",
@@ -979,68 +698,58 @@ dependencies = [
 
 [[package]]
 name = "typenum"
-version = "1.19.0"
+version = "1.12.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "562d481066bde0658276a35467c4af00bdc6ee726305698a55b86e61d7ad82bb"
-
-[[package]]
-name = "unicode-ident"
-version = "1.0.22"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9312f7c4f6ff9069b165498234ce8be658059c6728633667c526e27dc2cf1df5"
+checksum = "373c8a200f9e67a0c95e62a4f52fbf80c23b4381c05a17845531982fa99e6b33"
 
 [[package]]
 name = "unicode-width"
-version = "0.1.14"
+version = "0.1.8"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7dd6e30e90baa6f72411720665d41d89b9a3d039dc45b8faea1ddd07f617f6af"
+checksum = "9337591893a19b88d8d87f2cec1e73fad5cdfd10e5a6f349f498ad6ea2ffb1e3"
+
+[[package]]
+name = "unicode-xid"
+version = "0.2.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f7fe0bb3479651439c9112f72b6c505038574c9fbb575ed1bf3b797fa39dd564"
+
+[[package]]
+name = "version_check"
+version = "0.9.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b5a972e5669d67ba988ce3dc826706fb0a8b01471c088cb0b6110b805cc36aed"
 
 [[package]]
 name = "walkdir"
-version = "2.5.0"
+version = "2.3.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "29790946404f91d9c5d06f9874efddea1dc06c5efe94541a7d6863108e3a5e4b"
+checksum = "777182bc735b6424e1a57516d35ed72cb8019d85c8c9bf536dccb3445c1a2f7d"
 dependencies = [
  "same-file",
+ "winapi",
  "winapi-util",
 ]
 
-[[package]]
-name = "wasi"
-version = "0.11.1+wasi-snapshot-preview1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ccf3ec651a847eb01de73ccad15eb7d99f80485de043efb2f370cd654f4ea44b"
-
 [[package]]
 name = "wasm-bindgen"
-version = "0.2.106"
+version = "0.2.69"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "0d759f433fa64a2d763d1340820e46e111a7a5ab75f993d1852d70b03dbb80fd"
+checksum = "3cd364751395ca0f68cafb17666eee36b63077fb5ecd972bbcd74c90c4bf736e"
 dependencies = [
- "cfg-if",
- "once_cell",
- "rustversion",
+ "cfg-if 1.0.0",
  "wasm-bindgen-macro",
- "wasm-bindgen-shared",
 ]
 
 [[package]]
-name = "wasm-bindgen-macro"
-version = "0.2.106"
+name = "wasm-bindgen-backend"
+version = "0.2.69"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "48cb0d2638f8baedbc542ed444afc0644a29166f1595371af4fecf8ce1e7eeb3"
-dependencies = [
- "quote",
- "wasm-bindgen-macro-support",
-]
-
-[[package]]
-name = "wasm-bindgen-macro-support"
-version = "0.2.106"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "cefb59d5cd5f92d9dcf80e4683949f15ca4b511f4ac0a6e14d4e1ac60c6ecd40"
+checksum = "1114f89ab1f4106e5b55e688b828c0ab0ea593a1ea7c094b141b14cbaaec2d62"
 dependencies = [
  "bumpalo",
+ "lazy_static",
+ "log",
  "proc-macro2",
  "quote",
  "syn",
@@ -1048,19 +757,39 @@ dependencies = [
 ]
 
 [[package]]
-name = "wasm-bindgen-shared"
-version = "0.2.106"
+name = "wasm-bindgen-macro"
+version = "0.2.69"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "cbc538057e648b67f72a982e708d485b2efa771e1ac05fec311f9f63e5800db4"
+checksum = "7a6ac8995ead1f084a8dea1e65f194d0973800c7f571f6edd70adf06ecf77084"
 dependencies = [
- "unicode-ident",
+ "quote",
+ "wasm-bindgen-macro-support",
 ]
 
 [[package]]
-name = "web-sys"
-version = "0.3.83"
+name = "wasm-bindgen-macro-support"
+version = "0.2.69"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9b32828d774c412041098d182a8b38b16ea816958e07cf40eec2bc080ae137ac"
+checksum = "b5a48c72f299d80557c7c62e37e7225369ecc0c963964059509fbafe917c7549"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn",
+ "wasm-bindgen-backend",
+ "wasm-bindgen-shared",
+]
+
+[[package]]
+name = "wasm-bindgen-shared"
+version = "0.2.69"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7e7811dd7f9398f14cc76efd356f98f03aa30419dea46aa810d71e819fc97158"
+
+[[package]]
+name = "web-sys"
+version = "0.3.46"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "222b1ef9334f92a21d3fb53dc3fd80f30836959a90f9274a626d7e06315ba3c3"
 dependencies = [
  "js-sys",
  "wasm-bindgen",
@@ -1084,11 +813,11 @@ checksum = "ac3b87c63620426dd9b991e5ce0329eff545bccbbb34f3be09ff6fb6ab51b7b6"
 
 [[package]]
 name = "winapi-util"
-version = "0.1.11"
+version = "0.1.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c2a7b1c03c876122aa43f3020e6c3c3ee5c05081c9a00739faf7503aeba10d22"
+checksum = "70ec6ce85bb158151cae5e5c87f95a8e97d2c0c4b001223f33a334e3ce5de178"
 dependencies = [
- "windows-sys",
+ "winapi",
 ]
 
 [[package]]
@@ -1097,46 +826,8 @@ version = "0.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "712e227841d057c1ee1cd2fb22fa7e5a5461ae8e48fa2ca79ec42cfc1931183f"
 
-[[package]]
-name = "windows-link"
-version = "0.2.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f0805222e57f7521d6a62e36fa9163bc891acd422f971defe97d64e70d0a4fe5"
-
-[[package]]
-name = "windows-sys"
-version = "0.61.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ae137229bcbd6cdf0f7b80a31df61766145077ddf49416a728b02cb3921ff3fc"
-dependencies = [
- "windows-link",
-]
-
 [[package]]
 name = "wyz"
-version = "0.5.1"
+version = "0.2.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "05f360fc0b24296329c78fda852a1e9ae82de9cf7b27dae4b7f62f118f77b9ed"
-dependencies = [
- "tap",
-]
-
-[[package]]
-name = "zerocopy"
-version = "0.8.31"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "fd74ec98b9250adb3ca554bdde269adf631549f51d8a8f8f0a10b50f1cb298c3"
-dependencies = [
- "zerocopy-derive",
-]
-
-[[package]]
-name = "zerocopy-derive"
-version = "0.8.31"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d8a8d209fdf45cf5138cbb5a506f6b52522a25afccc534d1475dad8e31105c6a"
-dependencies = [
- "proc-macro2",
- "quote",
- "syn",
-]
+checksum = "85e60b0d1b5f99db2556934e21937020776a5d31520bf169e851ac44e6420214"
diff --git a/Cargo.toml b/Cargo.toml
index 9841ba8..7ab5e2e 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,9 +1,7 @@
 [workspace]
-members = ["aoc20*", "aoc20*/aoc20*_bench"]
+members = ["aoc*", "aoc*/aoc*_bench"]
 
-default-members = ["aoc2025"]
-
-resolver = "2"
+default-members = ["aoc2020"]
 
 [profile.release]
 debug = true
diff --git a/Makefile b/Makefile
index 007a759..1b23420 100644
--- a/Makefile
+++ b/Makefile
@@ -3,9 +3,11 @@ watch:
 	cargo watch -x clippy
 
 check:
-	cargo test --workspace --release
+	cargo test --all --release
 
-check-all:
-	cargo test --workspace --release -- --include-ignored
+# run these in release mode because the reason they're ignored is usually that
+# they take a long time to run
+check-all: check
+	cargo test --all --release -- --ignored
 
 .PHONY: watch check check-all
diff --git a/aoc-get/aoc-get b/aoc-get/aoc-get
deleted file mode 100755
index 007569a..0000000
--- a/aoc-get/aoc-get
+++ /dev/null
@@ -1,53 +0,0 @@
-#!/usr/bin/env fish
-
-function usage
-    printf "Usage: %s [OPTIONS]\n\n" (status -f)
-    printf "Options:\n"
-    printf "  -h/--help       Prints help and exits\n"
-    printf "  -d/--day=NUM    Day (minimum 1, maximum 25)\n"
-    printf "  -y/--year=NUM   Year (minimum 2015, default current year)\n"
-end
-
-set --local options
-set --append options (fish_opt --short h --long help)
-set --append options (fish_opt --short d --long day --required-val)"!_validate_int --min 1 --max 25"
-set --append options (fish_opt --short y --long year --required-val)"!_validate_int --min 2015"
-
-if not argparse $options -- $argv
-    exit 1
-end
-
-if set --query _flag_help
-    usage
-    exit 0
-end
-
-# automatically set day if we're in December, otherwise require a value
-set --local flag_day
-if set --query _flag_day
-    set flag_day $_flag_day
-else
-    set --local month (date +%-m)
-    if [ $month -eq 12 ]
-        set flag_day (date +%-d)
-    else
-        echo "Please provide a day to fetch"
-        exit 1
-    end
-end
-
-set --query _flag_year; or set --local _flag_year (date +%Y)
-
-if not set --query AOC_SESSION
-    echo "Please provide a session cookie via the AOC_SESSION environment variable"
-    exit 1
-end
-
-set --local padded_day (string pad --width 2 --char 0 {$flag_day})
-set --local outpath aoc{$_flag_year}/input/day{$padded_day}.txt
-
-echo "Saving input to" {$outpath} "..."
-
-curl https://adventofcode.com/{$_flag_year}/day/{$flag_day}/input \
-    --cookie "session="{$AOC_SESSION} \
-    --output {$outpath}
diff --git a/aoc-get/default.nix b/aoc-get/default.nix
deleted file mode 100644
index 14cf5f0..0000000
--- a/aoc-get/default.nix
+++ /dev/null
@@ -1,34 +0,0 @@
-{ lib
-, curl
-, fish
-, makeWrapper
-, stdenvNoCC }:
-stdenvNoCC.mkDerivation rec {
-  pname = "aoc-get";
-  version = "0.1.0";
-
-  src = ./aoc-get;
-
-  buildInputs = [
-    makeWrapper
-    fish
-  ];
-
-  dontUnpack = true;
-  dontBuild = true;
-
-  wrapperPath = lib.makeBinPath [
-    curl
-  ];
-
-  fixupPhase = ''
-    patchShebangs $out/bin/${pname}
-    wrapProgram $out/bin/${pname} --prefix PATH : "${wrapperPath}"
-  '';
-
-  installPhase = ''
-    mkdir -p $out/bin
-    cp $src $out/bin/${pname}
-    chmod a+x $out/bin/${pname}
-  '';
-}
diff --git a/aoc/Cargo.toml b/aoc/Cargo.toml
index db2d7ff..5387799 100644
--- a/aoc/Cargo.toml
+++ b/aoc/Cargo.toml
@@ -2,7 +2,7 @@
 name = "aoc"
 version = "0.1.0"
 authors = ["Antoine Martin <antoine97.martin@gmail.com>"]
-edition = "2021"
+edition = "2018"
 
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
diff --git a/aoc2015/Cargo.toml b/aoc2015/Cargo.toml
index 2d72c07..8b19df4 100644
--- a/aoc2015/Cargo.toml
+++ b/aoc2015/Cargo.toml
@@ -2,7 +2,7 @@
 name = "aoc2015"
 version = "0.1.0"
 authors = ["Antoine Martin <antoine97.martin@gmail.com>"]
-edition = "2021"
+edition = "2018"
 
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
diff --git a/aoc2015/aoc2015_bench/Cargo.toml b/aoc2015/aoc2015_bench/Cargo.toml
index a3e62af..d250c34 100644
--- a/aoc2015/aoc2015_bench/Cargo.toml
+++ b/aoc2015/aoc2015_bench/Cargo.toml
@@ -2,7 +2,7 @@
 name = "aoc2015_bench"
 version = "0.1.0"
 authors = ["Antoine Martin <antoine97.martin@gmail.com>"]
-edition = "2021"
+edition = "2018"
 
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
diff --git a/aoc2015/src/day02.rs b/aoc2015/src/day02.rs
index 874a109..79aa3ec 100644
--- a/aoc2015/src/day02.rs
+++ b/aoc2015/src/day02.rs
@@ -29,7 +29,7 @@ fn wrapping_paper(present: &Present) -> u64 {
 }
 
 fn part1(presents: &[Present]) -> u64 {
-    presents.iter().map(wrapping_paper).sum()
+    presents.iter().map(|p| wrapping_paper(p)).sum()
 }
 
 fn ribbon_bow_length(present: &Present) -> u64 {
@@ -49,7 +49,7 @@ fn ribbon_needed(present: &Present) -> u64 {
 }
 
 fn part2(presents: &[Present]) -> u64 {
-    presents.iter().map(ribbon_needed).sum()
+    presents.iter().map(|p| ribbon_needed(p)).sum()
 }
 
 struct Present {
diff --git a/aoc2015/src/day05.rs b/aoc2015/src/day05.rs
index 5efdf56..942a5e5 100644
--- a/aoc2015/src/day05.rs
+++ b/aoc2015/src/day05.rs
@@ -41,10 +41,10 @@ fn part1(input: &str) -> usize {
 
             false
         })
-        .filter(|line| !line.contains("ab"))
-        .filter(|line| !line.contains("cd"))
-        .filter(|line| !line.contains("pq"))
-        .filter(|line| !line.contains("xy"))
+        .filter(|line| line.find("ab").is_none())
+        .filter(|line| line.find("cd").is_none())
+        .filter(|line| line.find("pq").is_none())
+        .filter(|line| line.find("xy").is_none())
         .count()
 }
 
@@ -56,7 +56,7 @@ fn part2(input: &str) -> usize {
             for i in 0..(line.chars().count() - 3) {
                 let seq = &line[i..(i + 2)];
                 let line = &line[(i + 2)..];
-                if line.contains(seq) {
+                if line.find(seq).is_some() {
                     return true;
                 }
             }
diff --git a/aoc2018/Cargo.toml b/aoc2018/Cargo.toml
index f663faa..da6ce2b 100644
--- a/aoc2018/Cargo.toml
+++ b/aoc2018/Cargo.toml
@@ -2,7 +2,7 @@
 name = "aoc2018"
 version = "0.1.0"
 authors = ["Antoine Martin <antoine97.martin@gmail.com>"]
-edition = "2021"
+edition = "2018"
 
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
diff --git a/aoc2018/aoc2018_bench/Cargo.toml b/aoc2018/aoc2018_bench/Cargo.toml
index 3eb3e87..ba77e7a 100644
--- a/aoc2018/aoc2018_bench/Cargo.toml
+++ b/aoc2018/aoc2018_bench/Cargo.toml
@@ -2,7 +2,7 @@
 name = "aoc2018_bench"
 version = "0.1.0"
 authors = ["Antoine Martin <antoine97.martin@gmail.com>"]
-edition = "2021"
+edition = "2018"
 
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
diff --git a/aoc2018/src/day04.rs b/aoc2018/src/day04.rs
index dc69c45..879bf67 100644
--- a/aoc2018/src/day04.rs
+++ b/aoc2018/src/day04.rs
@@ -31,11 +31,11 @@ impl FromStr for Event {
     type Err = anyhow::Error;
 
     fn from_str(s: &str) -> Result<Self> {
-        if s.contains("wakes up") {
+        if s.find("wakes up").is_some() {
             Ok(Event::WakeUp)
-        } else if s.contains("falls asleep") {
+        } else if s.find("falls asleep").is_some() {
             Ok(Event::FallAsleep)
-        } else if s.contains("begins shift") {
+        } else if s.find("begins shift").is_some() {
             let pound = s.find('#').context("`#` not found")?;
             let s = &s[(pound + 1)..];
             let space = s.find(' ').context("` ` not found after `#`")?;
@@ -49,9 +49,9 @@ impl FromStr for Event {
 
 #[derive(Debug)]
 struct Date {
-    _year: u32,
-    _month: u8,
-    _day: u8,
+    year: u32,
+    month: u8,
+    day: u8,
 
     hour: u8,
     minute: u8,
@@ -84,9 +84,9 @@ impl FromStr for Date {
         let minute = s[..r_bracket].parse()?;
 
         Ok(Date {
-            _year: year,
-            _month: month,
-            _day: day,
+            year,
+            month,
+            day,
             hour,
             minute,
         })
diff --git a/aoc2018/src/day05.rs b/aoc2018/src/day05.rs
index 1b6ac4a..9b2c52a 100644
--- a/aoc2018/src/day05.rs
+++ b/aoc2018/src/day05.rs
@@ -14,11 +14,12 @@ pub fn run() -> Result<String> {
     Ok(res)
 }
 
+fn same_type(a: char, b: char) -> bool {
+    a.to_ascii_lowercase() == b.to_ascii_lowercase()
+}
+
 fn remove_type(input: &str, c: char) -> String {
-    input
-        .chars()
-        .filter(|ch| !c.eq_ignore_ascii_case(ch))
-        .collect()
+    input.chars().filter(|ch| !same_type(c, *ch)).collect()
 }
 
 fn collapse(input: &str) -> String {
@@ -31,7 +32,7 @@ fn collapse(input: &str) -> String {
         match last {
             Some(elem) => {
                 // if same type but different polarity
-                if elem.eq_ignore_ascii_case(&next) && elem != next {
+                if same_type(elem, next) && elem != next {
                     // drop both elem and next
                     last = res.pop();
                 } else {
diff --git a/aoc2019/Cargo.toml b/aoc2019/Cargo.toml
index 5db168f..088790c 100644
--- a/aoc2019/Cargo.toml
+++ b/aoc2019/Cargo.toml
@@ -2,7 +2,7 @@
 name = "aoc2019"
 version = "0.1.0"
 authors = ["Antoine Martin <antoine97.martin@gmail.com>"]
-edition = "2021"
+edition = "2018"
 
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
diff --git a/aoc2019/aoc2019_bench/Cargo.toml b/aoc2019/aoc2019_bench/Cargo.toml
index f58cac2..226729b 100644
--- a/aoc2019/aoc2019_bench/Cargo.toml
+++ b/aoc2019/aoc2019_bench/Cargo.toml
@@ -2,7 +2,7 @@
 name = "aoc2019_bench"
 version = "0.1.0"
 authors = ["Antoine Martin <antoine97.martin@gmail.com>"]
-edition = "2021"
+edition = "2018"
 
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
diff --git a/aoc2019/src/day03.rs b/aoc2019/src/day03.rs
index 38727f4..d77b719 100644
--- a/aoc2019/src/day03.rs
+++ b/aoc2019/src/day03.rs
@@ -18,7 +18,7 @@ pub fn run() -> Result<String> {
 }
 
 fn manhattan_distance(a: &Point, b: &Point) -> u64 {
-    (a.x - b.x).unsigned_abs() + (a.y - b.y).unsigned_abs()
+    (a.x - b.x).abs() as u64 + (a.y - b.y).abs() as u64
 }
 
 fn part1(first_wire: &Wire, second_wire: &Wire) -> Result<u64> {
@@ -48,7 +48,7 @@ fn part2(first_wire: &Wire, second_wire: &Wire) -> Result<u64> {
         let mut second_length = 0;
 
         for seg2 in &second_wire.0 {
-            if let Some(inter) = seg1.intersection(seg2) {
+            if let Some(inter) = seg1.intersection(&seg2) {
                 if inter.x == 0 && inter.y == 0 {
                     continue;
                 }
diff --git a/aoc2019/src/day06.rs b/aoc2019/src/day06.rs
index 5d2767e..3c7a134 100644
--- a/aoc2019/src/day06.rs
+++ b/aoc2019/src/day06.rs
@@ -49,7 +49,7 @@ fn part1(input: &str) -> Result<u64> {
     let mut cache = HashMap::new();
     Ok(orbits
         .keys()
-        .map(|k| count_orbits(k, &orbits, &mut cache))
+        .map(|k| count_orbits(&k, &orbits, &mut cache))
         .sum())
 }
 
diff --git a/aoc2019/src/day08.rs b/aoc2019/src/day08.rs
index 8c493d3..1d6d6d2 100644
--- a/aoc2019/src/day08.rs
+++ b/aoc2019/src/day08.rs
@@ -84,12 +84,12 @@ impl FromStr for Image {
 
         let lines = digits
             .chunks(IMG_WIDTH)
-            .map(<[_]>::to_vec)
+            .map(|chunk| chunk.to_vec())
             .collect::<Vec<Vec<u8>>>();
 
         let layers = lines
             .chunks(IMG_HEIGHT)
-            .map(<[_]>::to_vec)
+            .map(|chunk| chunk.to_vec())
             .map(|pixels| Layer { pixels })
             .collect::<Vec<Layer>>();
 
diff --git a/aoc2019/src/day12.rs b/aoc2019/src/day12.rs
index a178241..fa3aa55 100644
--- a/aoc2019/src/day12.rs
+++ b/aoc2019/src/day12.rs
@@ -233,12 +233,12 @@ impl Planet {
 
     fn potential_energy(&self) -> u64 {
         let pos = &self.position;
-        pos.x.unsigned_abs() + pos.y.unsigned_abs() + pos.z.unsigned_abs()
+        pos.x.abs() as u64 + pos.y.abs() as u64 + pos.z.abs() as u64
     }
 
     fn kinetic_energy(&self) -> u64 {
         let vel = &self.velocity;
-        vel.x.unsigned_abs() + vel.y.unsigned_abs() + vel.z.unsigned_abs()
+        vel.x.abs() as u64 + vel.y.abs() as u64 + vel.z.abs() as u64
     }
 
     fn total_energy(&self) -> u64 {
diff --git a/aoc2019/src/day14.rs b/aoc2019/src/day14.rs
index 5c7fb25..4462914 100644
--- a/aoc2019/src/day14.rs
+++ b/aoc2019/src/day14.rs
@@ -78,7 +78,7 @@ fn get_ore_cost(
             .with_context(|| format!("couldn't find recipe for {}", material))?;
 
         let needed = quantity - in_stock;
-        let num_reactions = needed.div_ceil(recipe.produced);
+        let num_reactions = (needed + recipe.produced - 1) / recipe.produced;
         for elem in &recipe.elems {
             total += get_ore_cost(
                 elem.name.clone(),
diff --git a/aoc2019/src/intcode/mod.rs b/aoc2019/src/intcode/mod.rs
index 10ec3e1..a93ba8b 100644
--- a/aoc2019/src/intcode/mod.rs
+++ b/aoc2019/src/intcode/mod.rs
@@ -226,7 +226,7 @@ impl Intcode {
                     let val1 = op1.get(&mut self.memory, self.relative_base)?;
                     let val2 = op2.get(&mut self.memory, self.relative_base)?;
 
-                    let res = i64::from(val1 < val2);
+                    let res = if val1 < val2 { 1 } else { 0 };
                     dst.set(res, &mut self.memory, self.relative_base)?;
 
                     self.ip += 4;
@@ -235,7 +235,7 @@ impl Intcode {
                     let val1 = op1.get(&mut self.memory, self.relative_base)?;
                     let val2 = op2.get(&mut self.memory, self.relative_base)?;
 
-                    let res = i64::from(val1 == val2);
+                    let res = if val1 == val2 { 1 } else { 0 };
                     dst.set(res, &mut self.memory, self.relative_base)?;
 
                     self.ip += 4;
@@ -263,7 +263,7 @@ impl Intcode {
     }
 
     pub fn get_day02_output(&self) -> Option<i64> {
-        self.memory.first().copied()
+        self.memory.get(0).copied()
     }
 
     pub fn get_last_output(&self) -> Option<i64> {
diff --git a/aoc2020/Cargo.toml b/aoc2020/Cargo.toml
index 10346de..d1c3b99 100644
--- a/aoc2020/Cargo.toml
+++ b/aoc2020/Cargo.toml
@@ -2,7 +2,7 @@
 name = "aoc2020"
 version = "0.1.0"
 authors = ["Antoine Martin <antoine97.martin@gmail.com>"]
-edition = "2021"
+edition = "2018"
 
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
@@ -10,7 +10,7 @@ edition = "2021"
 aoc = { path = "../aoc" }
 anyhow = "1.0"
 itertools = "0.9"
-nom = "7.0"
+nom = "6.0"
 
 [lib]
 path = "src/lib.rs"
diff --git a/aoc2020/aoc2020_bench/Cargo.toml b/aoc2020/aoc2020_bench/Cargo.toml
index 47f375f..93aba78 100644
--- a/aoc2020/aoc2020_bench/Cargo.toml
+++ b/aoc2020/aoc2020_bench/Cargo.toml
@@ -2,7 +2,7 @@
 name = "aoc2020_bench"
 version = "0.1.0"
 authors = ["Antoine Martin <antoine97.martin@gmail.com>"]
-edition = "2021"
+edition = "2018"
 
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
diff --git a/aoc2020/src/day04.rs b/aoc2020/src/day04.rs
index 74d021e..f79a908 100644
--- a/aoc2020/src/day04.rs
+++ b/aoc2020/src/day04.rs
@@ -154,16 +154,16 @@ impl CompletePassport {
 
     fn hgt_valid(&self) -> bool {
         if let Some(num) = self.hgt.strip_suffix("in") {
-            is_number_in_range(num, 59..=76)
+            is_number_in_range(&num, 59..=76)
         } else if let Some(num) = self.hgt.strip_suffix("cm") {
-            is_number_in_range(num, 150..=193)
+            is_number_in_range(&num, 150..=193)
         } else {
             false
         }
     }
 
     fn hcl_valid(&self) -> bool {
-        if let Some(rest) = self.hcl.strip_prefix('#') {
+        if let Some(rest) = self.hcl.strip_prefix("#") {
             rest.chars().filter(|c| !c.is_ascii_hexdigit()).count() == 0
         } else {
             false
diff --git a/aoc2020/src/day07.rs b/aoc2020/src/day07.rs
index 22915af..b846d51 100644
--- a/aoc2020/src/day07.rs
+++ b/aoc2020/src/day07.rs
@@ -70,7 +70,7 @@ impl BagRule {
         all_bags: &HashMap<String, BagRule>,
         memoized: &mut HashMap<String, bool>,
     ) -> bool {
-        match memoized.get(&self.color) {
+        return match memoized.get(&self.color) {
             Some(value) => *value,
             None => {
                 let value = self.contains.iter().any(|(_, c)| c == color)
@@ -85,7 +85,7 @@ impl BagRule {
 
                 value
             }
-        }
+        };
     }
 
     fn num_inner_bags(&self, all_bags: &HashMap<String, BagRule>) -> usize {
diff --git a/aoc2020/src/day11.rs b/aoc2020/src/day11.rs
index 9d068a5..b438df0 100644
--- a/aoc2020/src/day11.rs
+++ b/aoc2020/src/day11.rs
@@ -64,13 +64,13 @@ impl Layout {
 
                 match cell {
                     Cell::EmptySeat => {
-                        if adj_count(self, i, j, Cell::OccupiedSeat) == 0 {
+                        if adj_count(&self, i, j, Cell::OccupiedSeat) == 0 {
                             new[i][j] = Cell::OccupiedSeat;
                             changed = true;
                         }
                     }
                     Cell::OccupiedSeat => {
-                        if adj_count(self, i, j, Cell::OccupiedSeat) >= occupied_threshold {
+                        if adj_count(&self, i, j, Cell::OccupiedSeat) >= occupied_threshold {
                             new[i][j] = Cell::EmptySeat;
                             changed = true;
                         }
@@ -111,8 +111,9 @@ impl Layout {
             count += self
                 .grid
                 .get(i)
-                .and_then(|line| line.get(j))
-                .map(|&cell| u8::from(cell == value))
+                .map(|line| line.get(j))
+                .flatten()
+                .map(|&cell| if cell == value { 1 } else { 0 })
                 .unwrap_or(0);
         }
 
@@ -130,7 +131,7 @@ impl Layout {
 
                 let (i, j) = (i.wrapping_add(di as usize), j.wrapping_add(dj as usize));
 
-                let cell = self.grid.get(i).and_then(|line| line.get(j));
+                let cell = self.grid.get(i).map(|line| line.get(j)).flatten();
 
                 match cell {
                     // keep going, the next seat is farther away
diff --git a/aoc2020/src/day13.rs b/aoc2020/src/day13.rs
index 8a36cb2..5fe9974 100644
--- a/aoc2020/src/day13.rs
+++ b/aoc2020/src/day13.rs
@@ -91,7 +91,7 @@ fn find_timestamp(input: &str) -> Result<u64> {
 }
 
 fn satisfies_constraint(solution: u64, (remainder, divisor): (u64, u64)) -> bool {
-    (solution + remainder).is_multiple_of(divisor)
+    ((solution + remainder) % divisor) == 0
 }
 
 #[cfg(test)]
diff --git a/aoc2020/src/day14.rs b/aoc2020/src/day14.rs
index 9922034..aaed831 100644
--- a/aoc2020/src/day14.rs
+++ b/aoc2020/src/day14.rs
@@ -286,7 +286,7 @@ impl Program {
     }
 
     fn memory_sum(&self) -> u64 {
-        self.memory.values().sum()
+        self.memory.iter().map(|(_, value)| value).sum()
     }
 }
 
diff --git a/aoc2020/src/day16.rs b/aoc2020/src/day16.rs
index 66103ec..69f30d2 100644
--- a/aoc2020/src/day16.rs
+++ b/aoc2020/src/day16.rs
@@ -22,7 +22,8 @@ fn part1(input: &str) -> Result<u64> {
 
     Ok(tickets
         .iter()
-        .flat_map(|t| t.invalid_values(&fields_vec))
+        .map(|t| t.invalid_values(&fields_vec))
+        .flatten()
         .sum())
 }
 
@@ -44,6 +45,7 @@ fn assign_field_positions(
         .iter()
         .map(|(&name, field)| {
             let possibilities = (0..num_values)
+                .into_iter()
                 .filter(|i| tickets.iter().all(|t| t.valid_field(field, *i)))
                 .collect();
 
@@ -222,7 +224,7 @@ mod tests {
 
         let matches = assign_field_positions(fields, tickets);
 
-        let expected = ["row", "class", "seat"]
+        let expected = (&["row", "class", "seat"])
             .iter()
             .copied()
             .enumerate()
diff --git a/aoc2020/src/day18.rs b/aoc2020/src/day18.rs
index 287ae2e..12df6fe 100644
--- a/aoc2020/src/day18.rs
+++ b/aoc2020/src/day18.rs
@@ -84,7 +84,7 @@ fn operator_expr(input: &str) -> IResult<&str, Expr> {
 
     fold_many0(
         pair(delimited(char(' '), operator, char(' ')), term),
-        move || first_term.clone(),
+        first_term,
         |acc, (op, val)| Expr::Op(Box::new(acc), op, Box::new(val)),
     )(i)
 }
@@ -97,7 +97,7 @@ fn plus(input: &str) -> IResult<&str, Expr> {
             delimited(char(' '), char('+'), char(' ')),
             term_plus_priority,
         ),
-        move || first_term.clone(),
+        first_term,
         |acc, (_, val)| Expr::Op(Box::new(acc), Operator::Addition, Box::new(val)),
     )(i)
 }
@@ -107,13 +107,13 @@ fn mul(input: &str) -> IResult<&str, Expr> {
 
     fold_many0(
         pair(delimited(char(' '), char('*'), char(' ')), plus),
-        move || first_factor.clone(),
+        first_factor,
         |acc, (_, val)| Expr::Op(Box::new(acc), Operator::Multiplication, Box::new(val)),
     )(i)
 }
 
 fn num(input: &str) -> IResult<&str, Expr> {
-    map_res(take_while1(|c: char| c.is_ascii_digit()), |res: &str| {
+    map_res(take_while1(|c: char| c.is_digit(10)), |res: &str| {
         res.parse().map(Expr::Num)
     })(input)
 }
diff --git a/aoc2020/src/day20.rs b/aoc2020/src/day20.rs
index a671f0e..39fbf5f 100644
--- a/aoc2020/src/day20.rs
+++ b/aoc2020/src/day20.rs
@@ -59,7 +59,7 @@ enum Rotation {
 ///
 /// Note: we don't need a horizontal and a vertical flip, these result in the same output as a 180
 /// degree rotation when combined, so only one is necessary
-#[derive(Debug, Default, Clone, Copy)]
+#[derive(Debug, Clone, Copy)]
 struct Transform {
     flip: bool,
     rotation: Option<Rotation>,
@@ -121,6 +121,15 @@ impl Transform {
     }
 }
 
+impl Default for Transform {
+    fn default() -> Self {
+        Self {
+            flip: false,
+            rotation: None,
+        }
+    }
+}
+
 #[derive(Debug, Clone, Copy, Hash, PartialEq, Eq)]
 enum Position {
     Down,
@@ -307,7 +316,8 @@ impl Image {
         image_positions.insert((0, 0), tiles[0].clone());
 
         // compute each image position depending on its neighbours
-        while let Some(pos) = todo.pop() {
+        while !todo.is_empty() {
+            let pos = todo.pop().unwrap();
             let tile = &image_positions[&pos];
 
             for (direction, other_tile) in tile.neighbours(tiles) {
@@ -338,9 +348,9 @@ impl Image {
         const IMAGE_TILE_HEIGHT: usize = TILE_HEIGHT - 2;
         const IMAGE_TILE_WIDTH: usize = TILE_WIDTH - 2;
 
-        let height = *image_positions.iter().map(|((i, _), _)| i).max().unwrap() + 1;
+        let height = *image_positions.iter().map(|((i, _), _)| i).max().unwrap() as usize + 1;
         let height = height * IMAGE_TILE_HEIGHT;
-        let width = *image_positions.iter().map(|((_, j), _)| j).max().unwrap() + 1;
+        let width = *image_positions.iter().map(|((_, j), _)| j).max().unwrap() as usize + 1;
         let width = width * IMAGE_TILE_HEIGHT;
 
         let mut pixels = Vec::new();
@@ -351,8 +361,8 @@ impl Image {
         }
 
         for (pos, tile) in image_positions {
-            let begin_i = IMAGE_TILE_HEIGHT * pos.0;
-            let begin_j = IMAGE_TILE_WIDTH * pos.1;
+            let begin_i = IMAGE_TILE_HEIGHT * pos.0 as usize;
+            let begin_j = IMAGE_TILE_WIDTH * pos.1 as usize;
 
             for i in 0..IMAGE_TILE_HEIGHT {
                 for j in 0..IMAGE_TILE_WIDTH {
diff --git a/aoc2020/src/day23.rs b/aoc2020/src/day23.rs
index 5e3c626..cd27a66 100644
--- a/aoc2020/src/day23.rs
+++ b/aoc2020/src/day23.rs
@@ -71,6 +71,8 @@ impl CupCircle {
         // keep subtracting one until it finds a cup that wasn't just picked up. If at any point in
         // this process the value goes below the lowest value on any cup's label, it wraps around to
         // the highest value on any cup's label instead.
+        //
+        // TODO: use std::cmp::Ord::clamp when stabilized (Rust 1.50)
         let mut destination = if current > 1 { current - 1 } else { self.max() };
         while removed_cups.contains(&destination) {
             destination = if destination > 1 {
@@ -191,6 +193,8 @@ impl FastCupCircle {
         // keep subtracting one until it finds a cup that wasn't just picked up. If at any point in
         // this process the value goes below the lowest value on any cup's label, it wraps around to
         // the highest value on any cup's label instead.
+        //
+        // TODO: use std::cmp::Ord::clamp when stabilized (Rust 1.50)
         let mut destination = if self.current > 1 {
             self.current - 1
         } else {
diff --git a/aoc2020/src/day24.rs b/aoc2020/src/day24.rs
index ede3eb1..703c790 100644
--- a/aoc2020/src/day24.rs
+++ b/aoc2020/src/day24.rs
@@ -86,7 +86,9 @@ fn part2(input: &str) -> Result<usize> {
         let mut seen = HashSet::new();
         let mut todo: Vec<HexCoordinates> = black_tiles.iter().copied().collect();
 
-        while let Some(tile) = todo.pop() {
+        while !todo.is_empty() {
+            let tile = todo.pop().unwrap();
+
             if seen.contains(&tile) {
                 continue;
             } else {
@@ -97,7 +99,7 @@ fn part2(input: &str) -> Result<usize> {
 
             let count = neighbours
                 .iter()
-                .filter(|tile| black_tiles.contains(tile))
+                .filter(|tile| black_tiles.contains(&tile))
                 .count();
             if black_tiles.contains(&tile) {
                 // Any black tile with zero or more than 2 black tiles immediately adjacent to it is
@@ -131,7 +133,7 @@ fn part2(input: &str) -> Result<usize> {
 /// These use the axial coordinates described here:
 ///
 /// https://www.redblobgames.com/grids/hexagons/#coordinates-axial
-#[derive(Debug, Default, Clone, Copy, Hash, PartialEq, Eq)]
+#[derive(Debug, Clone, Copy, Hash, PartialEq, Eq)]
 struct HexCoordinates {
     q: i64,
     r: i64,
@@ -186,6 +188,12 @@ impl HexCoordinates {
     }
 }
 
+impl Default for HexCoordinates {
+    fn default() -> Self {
+        Self { q: 0, r: 0 }
+    }
+}
+
 #[cfg(test)]
 mod tests {
     use super::*;
diff --git a/aoc2021/Cargo.toml b/aoc2021/Cargo.toml
deleted file mode 100644
index a33f86c..0000000
--- a/aoc2021/Cargo.toml
+++ /dev/null
@@ -1,20 +0,0 @@
-[package]
-name = "aoc2021"
-version = "0.1.0"
-authors = ["Antoine Martin <antoine97.martin@gmail.com>"]
-edition = "2021"
-
-# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
-
-[dependencies]
-aoc = { path = "../aoc" }
-anyhow = "1.0"
-rand = "0.8"
-bitvec = "1.0"
-
-[lib]
-path = "src/lib.rs"
-
-[[bin]]
-name = "aoc2021"
-path = "src/main.rs"
diff --git a/aoc2021/aoc2021_bench/Cargo.toml b/aoc2021/aoc2021_bench/Cargo.toml
deleted file mode 100644
index d8f7503..0000000
--- a/aoc2021/aoc2021_bench/Cargo.toml
+++ /dev/null
@@ -1,17 +0,0 @@
-[package]
-name = "aoc2021_bench"
-version = "0.1.0"
-authors = ["Antoine Martin <antoine97.martin@gmail.com>"]
-edition = "2021"
-
-# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
-
-[dependencies]
-aoc2021 = { path = "../" }
-
-[dev-dependencies]
-criterion = "0.3"
-
-[[bench]]
-name = "aoc2021_bench"
-harness = false
diff --git a/aoc2021/aoc2021_bench/benches/aoc2021_bench.rs b/aoc2021/aoc2021_bench/benches/aoc2021_bench.rs
deleted file mode 100644
index bde1796..0000000
--- a/aoc2021/aoc2021_bench/benches/aoc2021_bench.rs
+++ /dev/null
@@ -1,46 +0,0 @@
-use criterion::{criterion_group, criterion_main, Criterion};
-
-use aoc2021::day01;
-use aoc2021::day02;
-use aoc2021::day03;
-use aoc2021::day04;
-use aoc2021::day05;
-use aoc2021::day06;
-use aoc2021::day07;
-use aoc2021::day08;
-use aoc2021::day09;
-use aoc2021::day10;
-use aoc2021::day11;
-use aoc2021::day12;
-use aoc2021::day13;
-use aoc2021::day14;
-use aoc2021::day15;
-use aoc2021::day16;
-use aoc2021::day17;
-
-fn aoc2021_all(c: &mut Criterion) {
-    c.bench_function("day01", |b| b.iter(|| day01::run().unwrap()));
-    c.bench_function("day02", |b| b.iter(|| day02::run().unwrap()));
-    c.bench_function("day03", |b| b.iter(|| day03::run().unwrap()));
-    c.bench_function("day04", |b| b.iter(|| day04::run().unwrap()));
-    c.bench_function("day05", |b| b.iter(|| day05::run().unwrap()));
-    c.bench_function("day06", |b| b.iter(|| day06::run().unwrap()));
-    c.bench_function("day07", |b| b.iter(|| day07::run().unwrap()));
-    c.bench_function("day08", |b| b.iter(|| day08::run().unwrap()));
-    c.bench_function("day09", |b| b.iter(|| day09::run().unwrap()));
-    c.bench_function("day10", |b| b.iter(|| day10::run().unwrap()));
-    c.bench_function("day11", |b| b.iter(|| day11::run().unwrap()));
-    c.bench_function("day12", |b| b.iter(|| day12::run().unwrap()));
-    c.bench_function("day13", |b| b.iter(|| day13::run().unwrap()));
-    c.bench_function("day14", |b| b.iter(|| day14::run().unwrap()));
-    c.bench_function("day15", |b| b.iter(|| day15::run().unwrap()));
-    c.bench_function("day16", |b| b.iter(|| day16::run().unwrap()));
-    c.bench_function("day17", |b| b.iter(|| day17::run().unwrap()));
-}
-
-criterion_group! {
-    name = all_days;
-    config = Criterion::default().sample_size(200);
-    targets = aoc2021_all
-}
-criterion_main!(all_days);
diff --git a/aoc2021/input/day01.txt b/aoc2021/input/day01.txt
deleted file mode 100644
index c7d277b..0000000
--- a/aoc2021/input/day01.txt
+++ /dev/null
@@ -1,2000 +0,0 @@
-150
-152
-155
-156
-157
-141
-124
-138
-143
-145
-144
-146
-148
-149
-148
-149
-124
-122
-123
-124
-117
-118
-119
-132
-159
-152
-175
-183
-194
-222
-226
-237
-242
-248
-229
-225
-227
-235
-229
-230
-227
-229
-252
-253
-251
-269
-270
-266
-268
-269
-270
-256
-257
-258
-261
-258
-251
-242
-245
-270
-275
-287
-309
-310
-330
-337
-344
-347
-353
-350
-355
-356
-353
-354
-372
-371
-370
-365
-368
-370
-374
-370
-332
-329
-340
-343
-347
-348
-349
-350
-351
-366
-358
-370
-369
-370
-367
-368
-369
-371
-382
-380
-385
-379
-394
-395
-393
-406
-389
-400
-389
-396
-386
-387
-390
-399
-406
-408
-413
-415
-416
-417
-416
-417
-416
-424
-425
-426
-427
-434
-435
-434
-436
-433
-430
-431
-434
-435
-436
-437
-452
-456
-459
-462
-463
-475
-477
-479
-500
-497
-498
-501
-507
-522
-517
-509
-519
-541
-542
-540
-551
-558
-551
-552
-553
-564
-569
-575
-581
-587
-589
-591
-596
-610
-617
-621
-618
-614
-615
-620
-640
-654
-669
-670
-686
-685
-686
-690
-691
-700
-706
-722
-721
-720
-725
-726
-736
-738
-754
-761
-759
-757
-765
-773
-790
-797
-798
-797
-798
-796
-789
-794
-798
-797
-804
-806
-807
-831
-823
-833
-836
-857
-852
-856
-863
-896
-898
-893
-904
-908
-931
-933
-948
-966
-967
-957
-961
-969
-971
-985
-988
-989
-996
-1018
-1020
-1025
-1060
-1061
-1060
-1088
-1090
-1096
-1091
-1092
-1091
-1064
-1070
-1087
-1088
-1083
-1085
-1090
-1091
-1094
-1093
-1091
-1093
-1103
-1104
-1105
-1107
-1126
-1127
-1126
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diff --git a/aoc2021/input/day01_provided.txt b/aoc2021/input/day01_provided.txt
deleted file mode 100644
index 167e291..0000000
--- a/aoc2021/input/day01_provided.txt
+++ /dev/null
@@ -1,10 +0,0 @@
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diff --git a/aoc2021/input/day02.txt b/aoc2021/input/day02.txt
deleted file mode 100644
index 353ba9a..0000000
--- a/aoc2021/input/day02.txt
+++ /dev/null
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diff --git a/aoc2021/input/day02_provided.txt b/aoc2021/input/day02_provided.txt
deleted file mode 100644
index b7172ac..0000000
--- a/aoc2021/input/day02_provided.txt
+++ /dev/null
@@ -1,6 +0,0 @@
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diff --git a/aoc2021/input/day03.txt b/aoc2021/input/day03.txt
deleted file mode 100644
index 0e1771b..0000000
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diff --git a/aoc2021/input/day03_provided.txt b/aoc2021/input/day03_provided.txt
deleted file mode 100644
index a6366a8..0000000
--- a/aoc2021/input/day03_provided.txt
+++ /dev/null
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diff --git a/aoc2021/input/day04.txt b/aoc2021/input/day04.txt
deleted file mode 100644
index d567a2b..0000000
--- a/aoc2021/input/day04.txt
+++ /dev/null
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-
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-
- 2 62  8 53  3
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-
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-
-14 80 84 22 23
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-
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-
-53 34 22 41 59
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-
-58 51 98 28 29
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- 5 16  2  8  6
-
-67 51 43 89 94
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-
-15 12  6 27 76
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-
- 3 94 38 93 28
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-
-87 46 49 60 22
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-
-56 86 71 30 36
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-75  7 97 76 96
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-
-30 14 68 16 59
-23 60 77 37  4
-22 43 53 34 81
- 7 54 38 39 96
-25 86 64 46 44
-
- 2 72 69 90 58
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-75  1 92 66 29
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- 3 53 49  9 46
-
-21 22 25 42  7
- 4 95 82 91 27
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-31 88 93 52 96
-
-51 45 43 70 87
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-
-64 88 91 68 19
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-20  4 38 32 69
- 8  9 22 70 39
-85 28 97  2 71
-
-65 42 46 75 48
-26 66 97 16 74
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-61  9 54 22  2
-82  8 83  5 90
-
-18 51 61 57 11
-41 79 30 78 69
-75 14 81 40 88
-93 76 25 64 47
-24 34 94 46 89
-
-74  8  3 64 59
-67 49 26 32 83
-85  0  5 71 90
-16 27 81 98 56
-79 23 76 20 43
-
-37  6 24 16 69
-41 82 51  4 35
-79 94 99 42 12
-30 81 60  3 36
- 8 22 11 32 48
-
-68  9  1 47 21
-61 55  5 19 73
-29  0 48  4 31
-63 50 93 15 72
-39 98 57 70 65
-
-34 55 82 26 10
-62 85 68 69 36
- 5 46 54 50 17
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-76 91 43 37 97
-
-41 76  5 33 59
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- 0 39 64 27 83
-40 69 37 91 45
-55 49 54  9 61
-
-92 34 81 10 80
-64 85 69 28 66
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- 8 35 90 16 87
- 4 78 44 13 67
-
-30 21 24 26 40
-59 17  4 47 73
-10 31 88 12 29
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-13 58 91 55 36
-
-25 28 69  4 19
-45 62 32 16 98
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- 1 66 89 12 21
-
-85 34 16 30 71
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-
-96 94 98 27 56
-64 83 46 30  5
- 3 43 70 67 21
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-36 26 35 61 76
diff --git a/aoc2021/input/day04_provided.txt b/aoc2021/input/day04_provided.txt
deleted file mode 100644
index 669a51d..0000000
--- a/aoc2021/input/day04_provided.txt
+++ /dev/null
@@ -1,19 +0,0 @@
-7,4,9,5,11,17,23,2,0,14,21,24,10,16,13,6,15,25,12,22,18,20,8,19,3,26,1
-
-22 13 17 11  0
- 8  2 23  4 24
-21  9 14 16  7
- 6 10  3 18  5
- 1 12 20 15 19
-
- 3 15  0  2 22
- 9 18 13 17  5
-19  8  7 25 23
-20 11 10 24  4
-14 21 16 12  6
-
-14 21 17 24  4
-10 16 15  9 19
-18  8 23 26 20
-22 11 13  6  5
- 2  0 12  3  7
diff --git a/aoc2021/input/day05.txt b/aoc2021/input/day05.txt
deleted file mode 100644
index afd5d6f..0000000
--- a/aoc2021/input/day05.txt
+++ /dev/null
@@ -1,500 +0,0 @@
-964,133 -> 596,133
-920,215 -> 920,976
-123,528 -> 123,661
-613,13 -> 407,13
-373,876 -> 424,876
-616,326 -> 120,326
-486,335 -> 539,388
-104,947 -> 54,947
-319,241 -> 282,204
-453,175 -> 453,438
-485,187 -> 915,617
-863,605 -> 603,605
-870,524 -> 342,524
-967,395 -> 634,62
-405,181 -> 807,181
-961,363 -> 419,905
-89,586 -> 214,461
-545,481 -> 731,295
-407,678 -> 626,678
-421,642 -> 91,312
-11,22 -> 935,946
-770,208 -> 76,902
-668,858 -> 668,890
-568,451 -> 574,451
-233,56 -> 371,56
-233,932 -> 44,932
-404,81 -> 796,81
-520,77 -> 403,194
-296,736 -> 447,887
-210,909 -> 16,909
-692,483 -> 877,668
-777,289 -> 744,289
-22,760 -> 652,130
-96,360 -> 626,360
-101,267 -> 101,783
-47,667 -> 660,667
-805,682 -> 563,440
-112,15 -> 463,366
-406,808 -> 430,808
-793,767 -> 107,81
-560,534 -> 958,534
-722,429 -> 722,459
-646,889 -> 646,195
-433,942 -> 449,958
-716,503 -> 716,99
-266,450 -> 266,780
-316,81 -> 565,81
-760,452 -> 687,452
-976,983 -> 15,22
-499,564 -> 499,909
-839,913 -> 38,112
-707,333 -> 438,333
-47,644 -> 352,644
-807,309 -> 807,706
-434,686 -> 812,308
-559,572 -> 63,76
-493,352 -> 581,352
-94,88 -> 928,88
-898,738 -> 106,738
-201,10 -> 564,10
-976,914 -> 976,472
-836,153 -> 585,153
-178,43 -> 17,204
-784,967 -> 738,967
-370,359 -> 449,359
-13,526 -> 637,526
-399,158 -> 10,158
-572,293 -> 289,293
-627,674 -> 895,674
-921,402 -> 984,402
-907,667 -> 944,704
-574,877 -> 882,569
-977,977 -> 121,121
-550,584 -> 862,584
-396,556 -> 396,289
-391,33 -> 532,174
-12,988 -> 989,11
-48,787 -> 48,637
-476,638 -> 113,638
-985,985 -> 13,13
-838,784 -> 198,784
-567,195 -> 677,305
-174,251 -> 577,654
-296,801 -> 53,558
-983,899 -> 983,380
-507,230 -> 507,929
-264,516 -> 668,920
-865,952 -> 865,768
-522,290 -> 744,512
-936,958 -> 936,115
-527,871 -> 527,519
-944,972 -> 21,49
-880,380 -> 695,565
-471,374 -> 446,349
-503,597 -> 127,221
-471,514 -> 30,73
-890,232 -> 890,511
-14,461 -> 14,853
-167,676 -> 148,676
-987,230 -> 754,230
-797,725 -> 797,847
-347,21 -> 84,21
-839,274 -> 964,274
-607,456 -> 894,456
-335,949 -> 301,949
-167,236 -> 820,889
-87,558 -> 87,917
-318,788 -> 622,484
-699,583 -> 699,321
-971,967 -> 35,31
-420,44 -> 420,36
-29,484 -> 458,484
-768,157 -> 768,30
-690,839 -> 317,839
-870,578 -> 560,578
-697,195 -> 70,822
-689,45 -> 689,223
-790,724 -> 341,724
-694,291 -> 694,507
-43,339 -> 43,987
-590,733 -> 590,179
-751,361 -> 945,361
-99,820 -> 450,469
-460,696 -> 942,696
-783,940 -> 487,644
-630,537 -> 48,537
-643,856 -> 643,396
-558,733 -> 257,432
-16,972 -> 570,418
-636,188 -> 636,610
-868,138 -> 868,407
-85,424 -> 85,919
-710,932 -> 354,576
-356,505 -> 783,505
-606,876 -> 606,62
-577,431 -> 749,431
-108,262 -> 108,145
-615,455 -> 264,104
-205,754 -> 866,754
-189,182 -> 855,848
-10,43 -> 925,958
-293,773 -> 293,534
-746,313 -> 802,369
-607,174 -> 211,570
-860,840 -> 260,240
-879,78 -> 595,78
-11,143 -> 449,143
-190,983 -> 267,983
-912,92 -> 76,928
-744,364 -> 744,258
-436,417 -> 46,807
-629,592 -> 517,592
-113,893 -> 113,959
-714,213 -> 786,285
-868,165 -> 868,731
-349,69 -> 491,69
-278,430 -> 111,263
-593,849 -> 593,203
-156,860 -> 876,860
-169,615 -> 169,984
-983,93 -> 139,937
-94,548 -> 18,548
-623,72 -> 106,589
-530,334 -> 473,334
-384,746 -> 925,205
-711,74 -> 28,757
-850,728 -> 629,949
-378,801 -> 228,651
-347,968 -> 201,822
-82,578 -> 82,555
-149,405 -> 707,963
-254,169 -> 793,169
-443,454 -> 331,454
-460,659 -> 608,807
-838,807 -> 31,807
-561,952 -> 290,952
-755,626 -> 204,75
-550,424 -> 550,81
-772,115 -> 772,600
-40,517 -> 40,232
-277,841 -> 317,841
-899,150 -> 128,921
-735,332 -> 465,332
-839,254 -> 915,330
-959,616 -> 182,616
-729,723 -> 487,965
-64,838 -> 953,838
-689,830 -> 689,982
-191,83 -> 191,879
-522,833 -> 942,833
-877,785 -> 877,346
-255,95 -> 556,95
-782,491 -> 475,798
-268,815 -> 812,271
-119,181 -> 905,181
-445,457 -> 742,160
-973,30 -> 27,976
-356,681 -> 356,289
-882,279 -> 914,279
-672,162 -> 672,153
-180,729 -> 357,729
-985,716 -> 985,313
-191,618 -> 191,963
-949,749 -> 636,749
-289,902 -> 142,902
-923,615 -> 123,615
-710,929 -> 541,760
-211,402 -> 211,433
-515,178 -> 533,178
-525,869 -> 525,578
-201,569 -> 17,569
-629,848 -> 882,848
-152,512 -> 152,189
-914,723 -> 764,723
-218,231 -> 721,734
-438,382 -> 846,382
-582,475 -> 582,559
-529,943 -> 529,683
-330,312 -> 59,312
-242,900 -> 862,900
-271,220 -> 271,118
-182,459 -> 182,673
-513,265 -> 513,420
-918,942 -> 378,942
-277,765 -> 812,230
-625,874 -> 219,874
-737,533 -> 644,626
-647,975 -> 152,480
-638,284 -> 785,284
-549,680 -> 549,877
-886,278 -> 372,792
-130,560 -> 516,174
-186,741 -> 186,555
-208,536 -> 469,536
-674,906 -> 312,906
-934,156 -> 934,322
-568,412 -> 214,412
-243,19 -> 243,814
-861,230 -> 104,987
-683,891 -> 683,533
-545,740 -> 545,980
-343,320 -> 796,320
-821,220 -> 821,302
-578,741 -> 578,141
-633,405 -> 27,405
-645,975 -> 225,555
-25,527 -> 412,527
-378,817 -> 378,913
-352,741 -> 352,293
-48,986 -> 925,109
-506,231 -> 491,231
-854,883 -> 48,77
-261,221 -> 895,855
-902,240 -> 902,943
-145,338 -> 770,963
-832,216 -> 832,869
-480,385 -> 324,385
-644,202 -> 433,202
-202,176 -> 190,176
-668,693 -> 668,349
-95,230 -> 143,230
-873,144 -> 67,950
-232,509 -> 238,509
-963,43 -> 133,873
-527,631 -> 641,517
-363,61 -> 849,61
-72,326 -> 72,861
-542,801 -> 233,492
-247,48 -> 247,785
-972,563 -> 480,71
-362,870 -> 932,300
-263,811 -> 263,584
-556,157 -> 417,157
-946,900 -> 175,129
-790,542 -> 530,542
-777,195 -> 154,818
-71,764 -> 71,193
-197,13 -> 453,13
-664,714 -> 158,714
-257,819 -> 257,730
-796,927 -> 688,927
-124,53 -> 954,883
-30,16 -> 980,966
-84,151 -> 597,151
-840,776 -> 684,776
-548,460 -> 718,630
-291,635 -> 291,151
-948,43 -> 58,933
-373,483 -> 373,591
-309,81 -> 259,81
-692,808 -> 692,835
-737,112 -> 215,634
-808,595 -> 808,115
-160,912 -> 973,99
-494,191 -> 494,475
-713,925 -> 43,255
-736,580 -> 290,134
-257,679 -> 725,211
-464,81 -> 712,81
-35,147 -> 35,420
-372,159 -> 372,548
-508,228 -> 682,402
-120,491 -> 518,889
-139,948 -> 272,815
-398,523 -> 398,818
-935,50 -> 40,945
-415,959 -> 195,739
-250,868 -> 250,930
-77,60 -> 917,900
-584,389 -> 493,298
-362,163 -> 362,704
-670,740 -> 670,703
-689,297 -> 689,388
-988,572 -> 988,340
-238,248 -> 238,916
-748,753 -> 29,34
-184,565 -> 184,486
-812,217 -> 812,34
-60,140 -> 96,104
-826,673 -> 230,673
-221,221 -> 207,235
-449,483 -> 270,304
-805,810 -> 805,564
-952,52 -> 139,865
-428,967 -> 312,851
-854,673 -> 661,673
-985,209 -> 853,209
-523,365 -> 54,365
-492,171 -> 646,171
-908,853 -> 69,14
-38,698 -> 724,12
-400,479 -> 167,479
-948,313 -> 948,976
-280,145 -> 37,145
-206,858 -> 683,381
-203,413 -> 545,413
-726,173 -> 673,173
-30,954 -> 150,954
-319,592 -> 870,41
-808,91 -> 180,719
-845,612 -> 972,485
-160,430 -> 160,780
-19,339 -> 379,339
-476,550 -> 476,291
-341,785 -> 229,673
-371,476 -> 371,663
-509,836 -> 412,933
-980,20 -> 31,969
-822,526 -> 328,32
-859,314 -> 425,314
-963,961 -> 963,100
-984,978 -> 31,25
-659,251 -> 619,211
-649,477 -> 846,477
-32,259 -> 724,951
-468,753 -> 468,91
-690,301 -> 690,652
-436,912 -> 845,503
-32,123 -> 576,667
-142,79 -> 741,678
-610,228 -> 468,370
-172,667 -> 172,736
-961,700 -> 132,700
-804,875 -> 804,213
-71,970 -> 340,970
-171,52 -> 149,30
-754,604 -> 226,604
-485,941 -> 27,941
-126,383 -> 328,181
-41,39 -> 987,985
-128,62 -> 896,830
-414,278 -> 923,787
-712,15 -> 712,859
-794,35 -> 200,629
-516,147 -> 402,261
-526,862 -> 905,862
-721,407 -> 721,887
-728,920 -> 339,920
-117,417 -> 203,417
-291,561 -> 17,835
-171,359 -> 837,359
-93,125 -> 136,125
-220,226 -> 220,177
-75,434 -> 75,407
-235,664 -> 141,664
-553,490 -> 566,477
-487,651 -> 487,877
-699,150 -> 933,384
-73,556 -> 453,556
-363,371 -> 363,984
-905,106 -> 668,106
-139,271 -> 139,125
-466,379 -> 466,420
-12,935 -> 625,935
-89,892 -> 779,892
-119,701 -> 270,852
-354,886 -> 80,886
-917,376 -> 440,376
-23,182 -> 794,953
-451,718 -> 121,718
-62,251 -> 62,451
-642,74 -> 642,698
-425,200 -> 442,200
-828,175 -> 828,405
-751,743 -> 591,743
-569,681 -> 574,681
-329,187 -> 329,837
-302,592 -> 302,230
-359,135 -> 386,108
-44,234 -> 44,731
-836,305 -> 836,574
-170,512 -> 367,512
-576,699 -> 576,44
-398,185 -> 821,185
-733,78 -> 733,747
-141,183 -> 141,787
-65,360 -> 65,691
-828,780 -> 828,98
-776,744 -> 776,751
-881,74 -> 481,474
-438,642 -> 438,399
-676,972 -> 175,972
-60,318 -> 56,314
-312,169 -> 341,169
-736,472 -> 392,128
-225,281 -> 164,281
-407,799 -> 341,799
-458,826 -> 983,301
-12,988 -> 987,13
-23,854 -> 662,215
-82,863 -> 82,416
-542,708 -> 542,44
-659,51 -> 520,51
-353,246 -> 353,90
-985,976 -> 77,68
-628,493 -> 628,510
-51,48 -> 635,48
-97,814 -> 828,83
-14,44 -> 773,44
-603,178 -> 597,178
-11,220 -> 783,220
-613,39 -> 613,719
-68,303 -> 690,925
-121,974 -> 896,199
-343,54 -> 343,837
-744,303 -> 744,942
-678,370 -> 246,370
-937,134 -> 84,987
-357,333 -> 357,516
-848,212 -> 429,631
-909,244 -> 138,244
-122,794 -> 786,130
-274,611 -> 57,611
-66,337 -> 385,18
-847,356 -> 831,356
-740,480 -> 740,359
-194,443 -> 194,301
-50,564 -> 572,42
-86,587 -> 774,587
-708,258 -> 49,917
-420,530 -> 277,387
-509,580 -> 509,71
-237,196 -> 479,196
-442,287 -> 850,287
-830,393 -> 532,393
-274,720 -> 501,493
-610,565 -> 218,957
-380,393 -> 380,800
-237,847 -> 155,847
-267,791 -> 52,791
-275,772 -> 275,794
-239,238 -> 419,418
-200,785 -> 884,101
-185,980 -> 185,284
-47,46 -> 750,749
-724,661 -> 724,337
-630,349 -> 666,349
-21,911 -> 21,569
-661,562 -> 661,925
-41,898 -> 41,104
-988,67 -> 105,67
-739,65 -> 868,65
-187,973 -> 809,973
-730,211 -> 255,686
-254,445 -> 254,872
-622,364 -> 235,751
-402,980 -> 761,621
-46,488 -> 960,488
-799,708 -> 799,862
-909,181 -> 909,189
-450,266 -> 450,304
-631,584 -> 631,455
-164,830 -> 744,250
-679,755 -> 690,744
-949,26 -> 190,785
-695,783 -> 218,783
-269,151 -> 40,151
-166,152 -> 22,152
-281,819 -> 922,178
-956,649 -> 956,593
diff --git a/aoc2021/input/day05_provided.txt b/aoc2021/input/day05_provided.txt
deleted file mode 100644
index b258f68..0000000
--- a/aoc2021/input/day05_provided.txt
+++ /dev/null
@@ -1,10 +0,0 @@
-0,9 -> 5,9
-8,0 -> 0,8
-9,4 -> 3,4
-2,2 -> 2,1
-7,0 -> 7,4
-6,4 -> 2,0
-0,9 -> 2,9
-3,4 -> 1,4
-0,0 -> 8,8
-5,5 -> 8,2
diff --git a/aoc2021/input/day06.txt b/aoc2021/input/day06.txt
deleted file mode 100644
index 156bc49..0000000
--- a/aoc2021/input/day06.txt
+++ /dev/null
@@ -1 +0,0 @@
-4,1,4,1,3,3,1,4,3,3,2,1,1,3,5,1,3,5,2,5,1,5,5,1,3,2,5,3,1,3,4,2,3,2,3,3,2,1,5,4,1,1,1,2,1,4,4,4,2,1,2,1,5,1,5,1,2,1,4,4,5,3,3,4,1,4,4,2,1,4,4,3,5,2,5,4,1,5,1,1,1,4,5,3,4,3,4,2,2,2,2,4,5,3,5,2,4,2,3,4,1,4,4,1,4,5,3,4,2,2,2,4,3,3,3,3,4,2,1,2,5,5,3,2,3,5,5,5,4,4,5,5,4,3,4,1,5,1,3,4,4,1,3,1,3,1,1,2,4,5,3,1,2,4,3,3,5,4,4,5,4,1,3,1,1,4,4,4,4,3,4,3,1,4,5,1,2,4,3,5,1,1,2,1,1,5,4,2,1,5,4,5,2,4,4,1,5,2,2,5,3,3,2,3,1,5,5,5,4,3,1,1,5,1,4,5,2,1,3,1,2,4,4,1,1,2,5,3,1,5,2,4,5,1,2,3,1,2,2,1,2,2,1,4,1,3,4,2,1,1,5,4,1,5,4,4,3,1,3,3,1,1,3,3,4,2,3,4,2,3,1,4,1,5,3,1,1,5,3,2,3,5,1,3,1,1,3,5,1,5,1,1,3,1,1,1,1,3,3,1
diff --git a/aoc2021/input/day06_provided.txt b/aoc2021/input/day06_provided.txt
deleted file mode 100644
index 55129f1..0000000
--- a/aoc2021/input/day06_provided.txt
+++ /dev/null
@@ -1 +0,0 @@
-3,4,3,1,2
diff --git a/aoc2021/input/day07.txt b/aoc2021/input/day07.txt
deleted file mode 100644
index 706de5d..0000000
--- a/aoc2021/input/day07.txt
+++ /dev/null
@@ -1 +0,0 @@
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diff --git a/aoc2021/input/day07_provided.txt b/aoc2021/input/day07_provided.txt
deleted file mode 100644
index 18bd32a..0000000
--- a/aoc2021/input/day07_provided.txt
+++ /dev/null
@@ -1 +0,0 @@
-16,1,2,0,4,2,7,1,2,14
diff --git a/aoc2021/input/day08.txt b/aoc2021/input/day08.txt
deleted file mode 100644
index 4aa4902..0000000
--- a/aoc2021/input/day08.txt
+++ /dev/null
@@ -1,200 +0,0 @@
-beacf afbd bcead cgefa ecdbga efb gbfdeac ecgfbd acbdfe fb | bf efb bgecdfa egcfa
-cbdgef cdfageb cegbd fecba edgf dcfbe dbcafg df fcd dbegca | bgcdef dgbec bfeac fdeg
-bgdcfa dgabf bfdec baefd abeg eda afcdge ea bfceadg dfegba | efbad fbdea dae fagbd
-cfdabe fcgbe gcdeb ecdfgb bdc cdgf cd cfageb bgdae daebfcg | decbaf cdfg deabg cd
-eacgdfb fdbeca agedc cbedf dcfgab bgef gdf fdgec fbcged gf | gf acegd fdeabgc gfd
-egcd aebdcf gbeca eg edfcbga gbe cfbag bdeca gadbec bdgefa | caegfbd dgcebfa eg bgdfae
-fcgab egafb gedbca gfc cf ceagdf cafbdeg gcafbd dbagc cfdb | dbecga dbgcefa cfg fcg
-geacd bg cbfead efgabcd fbace ceabg efbadg gfbc gab geabcf | cfbg fabce bg fdgeacb
-bfceg ca baefc caedfb acfedgb cfad edacbg eac debaf bdfage | geadbc bfgeacd efagcdb cefbg
-fd dcfbge fcad dfg bgaefc fdcgab fgdceab afdbg cbagf gdaeb | aecdgfb dbcfag cdaf gfecba
-dabce gceab fegcab fbdca adeg gcabdfe gedbac ed egdfbc deb | fdegcb acbdf ed gdae
-bgcea cbfdage egad ecadb beg befdcg fcgba aecbdf ge abedcg | geb gbe deag eg
-bfecag egbdfac abecg gcebf efdagc ca acbf cfbegd eac bgaed | bdcegfa gbfce dbgecaf ac
-fcbed dbfegca cdafbe edfgc abfde ebc egcfab dbca fdgbea cb | cb fgedc cb cdfeb
-fb fdeacb bfe bfdc ebcgda afdeb acbfge agedf ecbad fdagcbe | gfcdbae fb abcefgd bef
-egbca cfe eadbfg baedgfc cf bcfd afbde acebf fecdag edafbc | cfe caedfgb fc eadfgc
-gfabc fbcaeg bagd cgbfaed dfecb gfdcb fcedga dg dafbgc dgf | abgd bdgcf ebcdfga fcedbga
-cdb abce ebgfdc bfagdec abdcef dbfea gfdca facbd dfaebg cb | cdb cb dbc cdafbeg
-afdbe dcfegb gedca adcbe ecfgbad fcadge cb acgdeb cbe agcb | dcage bec cb cb
-gafdec cbdg fdgbce dce dfegb fceab becagdf dc dfbce agdefb | dgebf dc bfgde cde
-bagfc bdef cgeafd eagfbcd afceb fe cfabde agcdeb cef eabdc | fbdgaec ef ef cafbe
-fbage cgfba bdcage edagbf fe agcfdeb gfe adfe dgabe egbfdc | fe gfe geabf dgecab
-gdfec bgfc dbgafe gfdebc dbfeg fc fabdcge fcd gedac dcbfea | egadc cfd efbdg gcbf
-dacgf dfabc ebgcad daegfcb aedfbc dbgf agd aegfc cbfdag gd | agd gbdf bdafcge bcfegad
-gdbea ebacdf adebfgc dfb df fbdea gcfebd fceab bfcgea fdac | gfabecd efdgbc fcebgd fbd
-fba gbdcf cbae ebfgca fbcegda ab gbedfa gbacf gface gecdfa | ba bacgfde edfgac ab
-fgebda bfgae cfdgba agcbe dbaegcf gbfda ef bfe gcbdfe dfea | ebgfdc eagcb eafd bef
-agfecb cabef dafgec adfeb fbc gacb cb afbegdc cfaeg cbdefg | aegbfc fcb cgfdbe fcaged
-agf eadfc cegabfd eagdf efdgb cgfbde agbfed gfbcae ag abdg | abdegf gbad baecgf afdbeg
-gfbdac bd gcaefd bdcegfa gadbce dgb badf gbfdc fgecb cgadf | bgd fcbgd gdb dbfa
-cbgf efcgbd aefdcbg feabd dcf cdebf ebcgda cf egcbd fadceg | dcf cf gcedaf bgfc
-bacgfe fbc cgfe bcdagf gebfa cafeb bdcafge afdegb caedb cf | befga cbf gcfe bcf
-bgdf geacf acedgb gb aecbfd bdcfa abgcf bgc acgefdb cdgabf | cdbgea gcb fdbg adgefcb
-bdacgef fadeb abcg gfcebd gbf afbge egacf dgceaf bg aefgcb | gfb fbg dbgecfa bacg
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-beaf aed aecdf aebcgd eafdcb cgfabd ea gfcde cbdfa ceagdfb | fabe bafecd fecgdab ae
-bdcfe gbdae bcgafd daegfb aecg cdagbe gfbadec gbc gc edcgb | cdbge efbgcda dagcbe agebdf
-ec fdcag aegcbf bagfcd cgfade adecg fdaebcg fecd degba egc | deagc ec ebagd cafgeb
-dcgaeb egadc agcfde efac beagdfc fcdagb dgcef gbfde dfc cf | cdf cf febadgc ecgfd
-afd df gdafecb bdcf fecba acged edcabf egdbfa egfabc acdfe | cgebaf dacge fdbc decga
-ga beafc cgbea dceagf feabdc bfagec abgf cga fdeagbc cebdg | cagbe bgfa gbced gabf
-edag cdafb ae efacd eacgbf cedgbf afe fbceadg cdgaef egcdf | eaf cdafb efa ae
-eagdbfc cagdf badcge fgec cg cdg bdfca feadg fecdga dfbega | abcfd dgc cgd gdc
-beadg ca cdeba gcda acfebg dfbce fcbadge dbafge gdabec cae | gcad eca agbced gdbace
-agfcde gdceab dbeaf agfed dg acfegb gaedbfc adg aegcf fgcd | bdefa cgebfad gdfc gd
-gafcdb bfgaec daecf bcfgdea bged be dcgfb cfebd fbe dfebgc | fcabge dbfagec gebdfca gbfcd
-dcaef agfbec gea ge bged cbdfag fgbade gbdefca abfgd faged | bfdcega aeg bdgaf bedg
-dcbfa ag fcaegb fcdaegb gebdf adeg bdfga dgfeba ebcdgf gaf | cbgedfa ag egda ga
-bcgdaef fcabde dbfage cfdgb daegf bfe dgefb gfadce egab eb | bfe gfeabd gdbef dagfbec
-be egb fgcbde agdbcf gcdfb edbf bagecf ecadg bdefgca bdegc | efcdgab edgbcf efabcg dgecb
-bcegfd ceafd gbefca eba dacebfg gebfd baegdf dabg dbfae ab | bae abcgef gbdcefa dbga
-dceagfb edac ecfba cbgadf dfbge bcdefa fdc cd fcaegb edcbf | bdface cgfabde cdf cdafeb
-cgaedbf acd afbdge afdcg bdcaeg gadfb ac gcbdfa abcf cdgef | gdfac cgdef cgfad cfbedga
-gaefdcb debga cd aebcd gceafb afdceb cfabe dfcb dca agdcef | dbcafeg dfecag dbfc efgdacb
-abdeg eaf cedfba aefdg gcadfe af gdfaecb gcfa gdfec cbgdef | fea cebfda dfceag fadcebg
-bcgdfe fbdce fcdbea bcead adc ca bdgcaf edcgbaf baged feac | ecbad bfdec acd ac
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-bfcea dfbcea badge bfegdca gac cafdgb gc aecbgf caebg gefc | fegc bcaeg beafc feadbc
-cagef fadgebc fd daf dcfbga ebdgfa cbeadg afdeg abegd ebdf | gbafedc daefg fd gbadec
-dfaebc bcgaf bcaeg abecgf eagf dgecb cae ae dcgbafe gbadcf | ea gdecb bfacge gbace
-dfbec gcbade fadb df badefcg dbeac cfgeb ebafcd fecdga edf | febcg cfadeg ebcgda dbfa
-cadgfe bdfea dgbfeca dab dgbaec afdegb fdgb gaefd db cbfae | dgbf edabf bd dfgb
-decbga ebfcgd gcebf cabfe aec cbfad ea eafg adbgcef cebfag | efga ea cgafbed acfdb
-dcgefb gafc bagfce ca fcaeb aec dfbae ebgcf bcfdega deacgb | begcdfa ace fdegbac ac
-gafc dgafecb cdgeba dbgafc fa bacdg fceabd fbgde afb fadgb | cafgdbe fbedagc adefbc gacefdb
-dgfe dfa fd agcfbd bedac gfaec bdfcgae ebgcaf edfac acegfd | adf degf fad fedacgb
-efgacdb gedfc eadbfg efd dcagf cfdage gdbacf gcbed fe fcae | eafdgb fdcge cafe dfe
-aebg gbfdac dcebfga bdcef ebcfag abcfg acfeb dfcaeg ea eca | bega ace bacfg bgadcf
-ceag caefgb agb fbgdc ag cafbg becfa cfeabd deafgb eafcgbd | cgadbef gba ag bag
-bdge agbec dgcfae agbedcf gdc gbecad dabgc gd fbadc abefcg | gfcbaed dbge dg acfbd
-dcef efb dbcfgae gbecfa fe ebcdag cafedb cadbe afdbe badfg | edcf ef fe fe
-cdagfeb fgabc cafd fcb bdagc dfcgeb gbfacd cf baefg bdegac | cf acgbd fdac cdbfega
-cefbdg debgca abfeg cebgf fdbgac adcgefb fcde cbe ce cdbgf | bgfae bec cfdebga cfegbd
-fcbag gcfbed adgbefc afbdeg adbgf dbea ad cefagd daf debfg | da afd baegdfc afd
-ba gbcda degcb bad adbegc fgcad eacb adgefb gdfaecb gcbedf | dgbaec gdbcfe dba ba
-cdabf cbdgae facgb fadg acg gfbce ag cgdafb edcfab dbcegfa | dafg bdafec cbfeg facbg
-edbaf cfebad aec cdaf ca gfabce cbeda afgebd fbdacge bcgde | ac afgbce dacf fcda
-egdba bafeg bd gdfeba bcedfa agcde bad fgdb fceabg gabdefc | fbgae efgacb cadfeb bgdf
-fdcgae dcefb cdb fecgabd afecb dbcfeg bgceda bd gfdb cdegf | dgabec cbdgae bcd aedcbgf
-beg eg bfcea cdfgeb baefg abgdf fgeabd gcfdba agde dgbaefc | cdabgf dbefgc bdgfa facgebd
-dbgef bfecgad egfcd agfbce agbde bf gcebdf dagfce cbdf feb | fbe ebfcdg bcfd fgcdabe
-abgdec fgd fcgeb gedabf gfbdc dgaecbf afdc dgcafb fd bgcad | fgd adcf bgfcd fdegba
-cafdb acdbge acedb dfbcg af ceadfbg adf adfgec faeb dcfeab | gdabfec bdgfc dcfba feab
-dbcgae bcdfeg bfceadg bafgcd dacgb dfac cfgba bfc aefgb cf | dcegbf fc becagd fc
-geacb gebfda gbcdafe efgc ge ecabd bcefag gfbcda age gafbc | adbfecg acbge cabedfg gea
-gabce feagdb dgb fceadb deagb edbfa gd cbfgde agdbfec afdg | gbd begdcf aegbd bgd
-afecbg fgeda dfeabgc cdafe adgb dg dbcegf fabged faebg egd | ged abfgced gd afcde
-ec badfec cfe befgd gdacfe bace fgedbac gbcadf fdcba cfedb | ecf ec ce efcdb
-dacfgb fd gfdbae ecbdgfa ecbdag cbfeg faed gdf aegbd egdfb | eacdbg gbfdea begfd becfdag
-faegbd fgdace acbfeg dfgecba ed dabge fdbe dae badcg eagbf | dfeb dfgabe adcgb de
-dbe gbcef acdebf defa geabdc de dfcbag dbgaecf cabfd becdf | eadf adcegb efcbg cfabdg
-gcaed adgbce abfeg cb egcba cdba cgadef cgbefda fdbegc ebc | gbeaf cb bcad fadcge
-cef fbacd gafedc ec gaecbdf bfedg gdcfeb bfdce cegb bfadeg | ec fbceagd fce fec
-gfdae adgb cabfde fgdceb dea gafec bdgafec agdebf ad degfb | bcedgf bedacgf cegfa bcfgead
-ec cge dagef eacgbf cdafegb cfgadb gbedca ecagd cdeb agcbd | cfagbd dcega gaecdb bgfaecd
-ebgac cegbad dfcegb abegdf gbdec bae dcae efabgdc ea cgfba | ea eba deca bea
-dcgfba adgbef feac afedgc dcegf egabfdc fc fdaeg bdceg dcf | beagcfd gdbcafe efac cf
-cadfg gb cedagf gbd abgcfd fdcebga acgb febgda fdbec bdgcf | cagb cfagd gbd fegcbad
-fgdca afcdeg bcdeagf gc fcaed defabc aedcbg bgfad cdg cfge | gc gdeacf agdbce fbacdge
-fea adgeb bgfe fe dcfeag bafegd badcf aedbfgc adefb bcdeag | eafbd abfged begf egfb
-gace dagcf fedac fbceagd defab cfe gdcfeb cdfgae ec gbfadc | ecf cagefbd befgdac acge
-afc gaedf dfecga bafcdge cf bgdac dafcg eacbfd gbdafe gcef | adbcg fca agdbfce acf
-cdfebg dcbe fgbdac bfegd be beagfc gfdea gacfbed fbe cgfbd | gedabfc eb eb aegcbfd
-afg dfgec gcfeab ebcfagd fa adfe bagcd gdcfa gfbedc gecdfa | fa eacgdbf fa defa
-bfdag gbecd cefg efcbdga fbc cf gbcfd badfec bedfcg egcbda | gadefcb bfc bacfde bgedc
-cafde dce dcbfa dgcefb cgea dgafceb fgcdae dagfe gfebad ec | fcdae dbgfec gfdea dfcgeba
-gcebad cfgdb cfgeab cdb cd egcdbf gbdaf fcde fgdbcae gfbec | cbd geacdb adbcge dc
-afegb adbfg becafdg dg bgd gaebfc fdge cdfba gbcead abfdeg | gd gbd dabfc defg
-fabeg gd dfebcg dgfae bfgeca fecad adgb efabgd ecfdbag deg | gd cfead dcfea cbefgda
-bfceag dafgb fdce fc cfg gcdebf becgfda dgbec aedcgb cbgdf | fc adfgb dgfab cgbedf
-bfeg decaf cegfa ecfgab gcf dbfeacg caedgb aegbc dbcafg fg | bgdcfea fg bfdaegc afgcdbe
-eac ae cbdfe cbaedf abcfedg bade aefcbg bdcgef cedaf gdfca | efcdbg ae bdfce cdefa
-gdebfca bfgca fda bcafd ad gcda cfgdab fadbeg edfcb gcbfae | cgafdb fad fda acdg
-gfbdcae afed gedac facegd bgeac de fgbecd cagfd ged bdgfca | bacge egbacfd adgfc deg
-gdafbe dbacgf cbefag cbfdg bfdag fcedg cdbgfae adbc cgb cb | bc gadefb bc acbd
-fa egcad acfed ebdcfa dgcbef daf bdecf fgadbc fbae gabdecf | cedfa egdcbfa fa afd
-cfd fd gbafc dcagf daecg dbfa cbfage egfdbc bfdgcae cbdfga | ecbdgf df dabf fd
-eafbdgc baegd fe bagfed aebfg cabedg efg facgb bdgfec fade | defa ef ef fdae
-cfdeagb bdeacf eac gcdbfa egab egacfb cdgfe ea ecfga cgfba | aecfg dfbacge cae ea
-aefcdgb bacfg cdg afecd gedbcf afgcbe abgd adbfcg fgdac dg | bagfc gbfcdea gfdac bgda
-becf baefgd dcafg cb cdbage dcgfb bcg gdbef edbfcg egbcafd | fbce cbg gcbfde gefabd
-gb bgedca fedga cfdeag fegb dcbfa gab afgdb acbgefd bdgaef | bga gb gb ebfg
-dca cedbf dcfebga ca egbcad cdaefb fedag efdac acbf cfgdbe | fbcade cebfdag adc acd
-bgdeafc gaefd fbeagc cdfa fgc degcf dgbafe gcedaf dgcbe fc | gfc egafd cf bcdeg
-dfaeb fae ebacfd egadb fe gadbfc febc gbfeacd fagcde dcabf | beadg adefb fcbe dagfcb
-fgaed gd dacgfb egcd gdf acfed adbfceg edbfca dcafeg baefg | decaf bacdgf fgd ebgaf
-bcfeadg dfagce fdcgba dfcab gabec gcf gf abgfc bacedf bdgf | bcgfeda bdgf fg gf
-ceab gafec cef fcdgba cbfeadg bcagf ce ceagbf agdfe degcbf | efgca efgca cef ebac
-abgef abf gbeac gabfcde degcfb efdbga aefd bgdcfa af befdg | afbcdg fa bdfgec dfbgae
-gdafce cfb agfbc ebaf fcebdg aegfc cbgfea egbfdca dbgac bf | fb abfe aebf dgecbf
-ceadf fecag dcgaeb dgbfcea edc bcafd cdabef ed befd gfcdab | badecf ed egfca edfb
-gecdbaf dbag bfade gabfed cedfba gfade cfaebg fgdce ag fga | bafgdce gacbef ga dagb
-defbcg gbfce beag gacdf cfbaeg dbcfea ea cefga ceafbgd ace | aefcg ae aegcbf ebga
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diff --git a/aoc2021/input/day08_provided.txt b/aoc2021/input/day08_provided.txt
deleted file mode 100644
index c9f629b..0000000
--- a/aoc2021/input/day08_provided.txt
+++ /dev/null
@@ -1,10 +0,0 @@
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diff --git a/aoc2021/input/day09.txt b/aoc2021/input/day09.txt
deleted file mode 100644
index 3084053..0000000
--- a/aoc2021/input/day09.txt
+++ /dev/null
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diff --git a/aoc2021/input/day09_provided.txt b/aoc2021/input/day09_provided.txt
deleted file mode 100644
index 6dee4a4..0000000
--- a/aoc2021/input/day09_provided.txt
+++ /dev/null
@@ -1,5 +0,0 @@
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diff --git a/aoc2021/input/day10.txt b/aoc2021/input/day10.txt
deleted file mode 100644
index 3a3d7bd..0000000
--- a/aoc2021/input/day10.txt
+++ /dev/null
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diff --git a/aoc2021/input/day10_provided.txt b/aoc2021/input/day10_provided.txt
deleted file mode 100644
index b1518d9..0000000
--- a/aoc2021/input/day10_provided.txt
+++ /dev/null
@@ -1,10 +0,0 @@
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diff --git a/aoc2021/input/day11.txt b/aoc2021/input/day11.txt
deleted file mode 100644
index 3f9a2ec..0000000
--- a/aoc2021/input/day11.txt
+++ /dev/null
@@ -1,10 +0,0 @@
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diff --git a/aoc2021/input/day11_provided.txt b/aoc2021/input/day11_provided.txt
deleted file mode 100644
index 03743f6..0000000
--- a/aoc2021/input/day11_provided.txt
+++ /dev/null
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diff --git a/aoc2021/input/day12.txt b/aoc2021/input/day12.txt
deleted file mode 100644
index 731cd4b..0000000
--- a/aoc2021/input/day12.txt
+++ /dev/null
@@ -1,22 +0,0 @@
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diff --git a/aoc2021/input/day12_provided1.txt b/aoc2021/input/day12_provided1.txt
deleted file mode 100644
index 6fd8c41..0000000
--- a/aoc2021/input/day12_provided1.txt
+++ /dev/null
@@ -1,7 +0,0 @@
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diff --git a/aoc2021/input/day12_provided2.txt b/aoc2021/input/day12_provided2.txt
deleted file mode 100644
index 62cc714..0000000
--- a/aoc2021/input/day12_provided2.txt
+++ /dev/null
@@ -1,10 +0,0 @@
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diff --git a/aoc2021/input/day12_provided3.txt b/aoc2021/input/day12_provided3.txt
deleted file mode 100644
index 65f3833..0000000
--- a/aoc2021/input/day12_provided3.txt
+++ /dev/null
@@ -1,18 +0,0 @@
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diff --git a/aoc2021/input/day13.txt b/aoc2021/input/day13.txt
deleted file mode 100644
index aef0a4a..0000000
--- a/aoc2021/input/day13.txt
+++ /dev/null
@@ -1,916 +0,0 @@
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-
-fold along x=655
-fold along y=447
-fold along x=327
-fold along y=223
-fold along x=163
-fold along y=111
-fold along x=81
-fold along y=55
-fold along x=40
-fold along y=27
-fold along y=13
-fold along y=6
diff --git a/aoc2021/input/day13_provided.txt b/aoc2021/input/day13_provided.txt
deleted file mode 100644
index 282114c..0000000
--- a/aoc2021/input/day13_provided.txt
+++ /dev/null
@@ -1,21 +0,0 @@
-6,10
-0,14
-9,10
-0,3
-10,4
-4,11
-6,0
-6,12
-4,1
-0,13
-10,12
-3,4
-3,0
-8,4
-1,10
-2,14
-8,10
-9,0
-
-fold along y=7
-fold along x=5
diff --git a/aoc2021/input/day14.txt b/aoc2021/input/day14.txt
deleted file mode 100644
index eed6b77..0000000
--- a/aoc2021/input/day14.txt
+++ /dev/null
@@ -1,102 +0,0 @@
-CKFFSCFSCBCKBPBCSPKP
-
-NS -> P
-KV -> B
-FV -> S
-BB -> V
-CF -> O
-CK -> N
-BC -> B
-PV -> N
-KO -> C
-CO -> O
-HP -> P
-HO -> P
-OV -> O
-VO -> C
-SP -> P
-BV -> H
-CB -> F
-SF -> H
-ON -> O
-KK -> V
-HC -> N
-FH -> P
-OO -> P
-VC -> F
-VP -> N
-FO -> F
-CP -> C
-SV -> S
-PF -> O
-OF -> H
-BN -> V
-SC -> V
-SB -> O
-NC -> P
-CN -> K
-BP -> O
-PC -> H
-PS -> C
-NB -> K
-VB -> P
-HS -> V
-BO -> K
-NV -> B
-PK -> K
-SN -> H
-OB -> C
-BK -> S
-KH -> P
-BS -> S
-HV -> O
-FN -> F
-FS -> N
-FP -> F
-PO -> B
-NP -> O
-FF -> H
-PN -> K
-HF -> H
-VK -> K
-NF -> K
-PP -> H
-PH -> B
-SK -> P
-HN -> B
-VS -> V
-VN -> N
-KB -> O
-KC -> O
-KP -> C
-OS -> O
-SO -> O
-VH -> C
-OK -> B
-HH -> B
-OC -> P
-CV -> N
-SH -> O
-HK -> N
-NO -> F
-VF -> S
-NN -> O
-FK -> V
-HB -> O
-SS -> O
-FB -> B
-KS -> O
-CC -> S
-KF -> V
-VV -> S
-OP -> H
-KN -> F
-CS -> H
-CH -> P
-BF -> F
-NH -> O
-NK -> C
-OH -> C
-BH -> O
-FC -> V
-PB -> B
diff --git a/aoc2021/input/day14_provided.txt b/aoc2021/input/day14_provided.txt
deleted file mode 100644
index b5594dd..0000000
--- a/aoc2021/input/day14_provided.txt
+++ /dev/null
@@ -1,18 +0,0 @@
-NNCB
-
-CH -> B
-HH -> N
-CB -> H
-NH -> C
-HB -> C
-HC -> B
-HN -> C
-NN -> C
-BH -> H
-NC -> B
-NB -> B
-BN -> B
-BB -> N
-BC -> B
-CC -> N
-CN -> C
diff --git a/aoc2021/input/day15.txt b/aoc2021/input/day15.txt
deleted file mode 100644
index 1ec5758..0000000
--- a/aoc2021/input/day15.txt
+++ /dev/null
@@ -1,100 +0,0 @@
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diff --git a/aoc2021/input/day15_provided.txt b/aoc2021/input/day15_provided.txt
deleted file mode 100644
index ab80887..0000000
--- a/aoc2021/input/day15_provided.txt
+++ /dev/null
@@ -1,10 +0,0 @@
-1163751742
-1381373672
-2136511328
-3694931569
-7463417111
-1319128137
-1359912421
-3125421639
-1293138521
-2311944581
diff --git a/aoc2021/input/day16.txt b/aoc2021/input/day16.txt
deleted file mode 100644
index dbbec6c..0000000
--- a/aoc2021/input/day16.txt
+++ /dev/null
@@ -1 +0,0 @@
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
diff --git a/aoc2021/input/day17.txt b/aoc2021/input/day17.txt
deleted file mode 100644
index ba5668c..0000000
--- a/aoc2021/input/day17.txt
+++ /dev/null
@@ -1 +0,0 @@
-target area: x=277..318, y=-92..-53
diff --git a/aoc2021/input/day17_provided.txt b/aoc2021/input/day17_provided.txt
deleted file mode 100644
index a07e02d..0000000
--- a/aoc2021/input/day17_provided.txt
+++ /dev/null
@@ -1 +0,0 @@
-target area: x=20..30, y=-10..-5
diff --git a/aoc2021/input/day21.txt b/aoc2021/input/day21.txt
deleted file mode 100644
index 94d668d..0000000
--- a/aoc2021/input/day21.txt
+++ /dev/null
@@ -1,2 +0,0 @@
-Player 1 starting position: 4
-Player 2 starting position: 2
diff --git a/aoc2021/input/day21_provided.txt b/aoc2021/input/day21_provided.txt
deleted file mode 100644
index 3f69194..0000000
--- a/aoc2021/input/day21_provided.txt
+++ /dev/null
@@ -1,2 +0,0 @@
-Player 1 starting position: 4
-Player 2 starting position: 8
diff --git a/aoc2021/src/day01.rs b/aoc2021/src/day01.rs
deleted file mode 100644
index 13d369a..0000000
--- a/aoc2021/src/day01.rs
+++ /dev/null
@@ -1,73 +0,0 @@
-use std::fmt::Write;
-
-use anyhow::Result;
-
-const INPUT: &str = include_str!("../input/day01.txt");
-
-pub fn run() -> Result<String> {
-    let mut res = String::with_capacity(128);
-
-    writeln!(res, "part 1: {}", part1(INPUT)?)?;
-    writeln!(res, "part 2: {}", part2(INPUT)?)?;
-
-    Ok(res)
-}
-
-fn part1(input: &str) -> Result<usize> {
-    let measurements = input
-        .lines()
-        .map(|line| line.parse::<u64>().map_err(anyhow::Error::new))
-        .collect::<Result<Vec<_>>>()?;
-
-    Ok(count_increases(measurements.iter()))
-}
-
-fn count_increases<I, C>(numbers: I) -> usize
-where
-    C: std::cmp::PartialOrd,
-    I: Iterator<Item = C> + Clone,
-{
-    numbers
-        .clone()
-        .zip(numbers.skip(1))
-        .filter(|(a, b)| a < b)
-        .count()
-}
-
-fn part2(input: &str) -> Result<usize> {
-    let measurements = input
-        .lines()
-        .map(|line| line.parse::<u64>().map_err(anyhow::Error::new))
-        .collect::<Result<Vec<_>>>()?;
-
-    Ok(count_increases(
-        measurements.windows(3).map(|w| w.iter().sum::<u64>()),
-    ))
-}
-
-#[cfg(test)]
-mod tests {
-    use super::*;
-
-    const PROVIDED: &str = include_str!("../input/day01_provided.txt");
-
-    #[test]
-    fn part1_provided() {
-        assert_eq!(part1(PROVIDED).unwrap(), 7);
-    }
-
-    #[test]
-    fn part1_real() {
-        assert_eq!(part1(INPUT).unwrap(), 1502);
-    }
-
-    #[test]
-    fn part2_provided() {
-        assert_eq!(part2(PROVIDED).unwrap(), 5);
-    }
-
-    #[test]
-    fn part2_real() {
-        assert_eq!(part2(INPUT).unwrap(), 1538);
-    }
-}
diff --git a/aoc2021/src/day02.rs b/aoc2021/src/day02.rs
deleted file mode 100644
index f144b45..0000000
--- a/aoc2021/src/day02.rs
+++ /dev/null
@@ -1,106 +0,0 @@
-use std::fmt::Write;
-
-use anyhow::{bail, Context, Result};
-
-const INPUT: &str = include_str!("../input/day02.txt");
-
-pub fn run() -> Result<String> {
-    let mut res = String::with_capacity(128);
-
-    writeln!(res, "part 1: {}", part1(INPUT)?)?;
-    writeln!(res, "part 2: {}", part2(INPUT)?)?;
-
-    Ok(res)
-}
-
-fn part1(input: &str) -> Result<u64> {
-    let commands = input
-        .lines()
-        .map(str::parse::<Command>)
-        .collect::<Result<Vec<_>>>()?;
-    let mut horizontal_pos = 0;
-    let mut depth = 0;
-
-    for c in commands {
-        match c {
-            Command::Forward(dx) => horizontal_pos += dx,
-            Command::Up(dz) => depth -= dz,
-            Command::Down(dz) => depth += dz,
-        }
-    }
-
-    Ok(depth * horizontal_pos)
-}
-
-fn part2(input: &str) -> Result<u64> {
-    let commands = input
-        .lines()
-        .map(str::parse::<Command>)
-        .collect::<Result<Vec<_>>>()?;
-    let mut horizontal_pos = 0;
-    let mut depth = 0;
-    let mut aim = 0;
-
-    for c in commands {
-        match c {
-            Command::Forward(dx) => {
-                horizontal_pos += dx;
-                depth += aim * dx;
-            }
-            Command::Up(dz) => aim -= dz,
-            Command::Down(dz) => aim += dz,
-        }
-    }
-
-    Ok(depth * horizontal_pos)
-}
-
-enum Command {
-    Forward(u64),
-    Up(u64),
-    Down(u64),
-}
-
-impl std::str::FromStr for Command {
-    type Err = anyhow::Error;
-
-    fn from_str(s: &str) -> Result<Self> {
-        let (word, number) = s.split_once(' ').context("couldn't split command")?;
-
-        let number = number.parse()?;
-
-        Ok(match word {
-            "forward" => Self::Forward(number),
-            "up" => Self::Up(number),
-            "down" => Self::Down(number),
-            _ => bail!("unkown command"),
-        })
-    }
-}
-
-#[cfg(test)]
-mod tests {
-    use super::*;
-
-    const PROVIDED: &str = include_str!("../input/day02_provided.txt");
-
-    #[test]
-    fn part1_provided() {
-        assert_eq!(part1(PROVIDED).unwrap(), 150);
-    }
-
-    #[test]
-    fn part1_real() {
-        assert_eq!(part1(INPUT).unwrap(), 1962940);
-    }
-
-    #[test]
-    fn part2_provided() {
-        assert_eq!(part2(PROVIDED).unwrap(), 900);
-    }
-
-    #[test]
-    fn part2_real() {
-        assert_eq!(part2(INPUT).unwrap(), 1813664422);
-    }
-}
diff --git a/aoc2021/src/day03.rs b/aoc2021/src/day03.rs
deleted file mode 100644
index e4aa948..0000000
--- a/aoc2021/src/day03.rs
+++ /dev/null
@@ -1,164 +0,0 @@
-use std::fmt::Write;
-
-use anyhow::{Context, Result};
-
-const INPUT: &str = include_str!("../input/day03.txt");
-
-pub fn run() -> Result<String> {
-    let mut res = String::with_capacity(128);
-
-    writeln!(res, "part 1: {}", part1(INPUT)?)?;
-    writeln!(res, "part 2: {}", part2(INPUT)?)?;
-
-    Ok(res)
-}
-
-fn part1(input: &str) -> Result<u64> {
-    let binary_numbers: Vec<&str> = input.lines().collect();
-    // all binary numbers should have the same length
-    let size = binary_numbers[0].len();
-
-    let gamma = compute_gamma(&binary_numbers, size);
-    let epsilon = compute_epsilon(gamma, size);
-
-    Ok(gamma * epsilon)
-}
-
-/// Each bit in the gamma rate can be determined by finding the most common bit in the corresponding
-/// position of all numbers in the diagnostic report.
-fn compute_gamma(binary_numbers: &[&str], size: usize) -> u64 {
-    let mut gamma = 0;
-
-    for pos in 0..size {
-        let digit = u64::from(count_ones(binary_numbers, pos) > (binary_numbers.len() / 2));
-        gamma = (gamma << 1) | digit;
-    }
-
-    gamma
-}
-
-fn count_ones(binary_numbers: &[&str], pos: usize) -> usize {
-    binary_numbers
-        .iter()
-        .filter(|&&num| num.chars().nth(pos).unwrap() == '1')
-        .count()
-}
-
-/// The epsilon rate is calculated in a similar way; rather than use the most common bit, the least
-/// common bit from each position is used.
-///
-/// We can just use flip every bit in gamma (respecting the size of the input)
-fn compute_epsilon(gamma: u64, size: usize) -> u64 {
-    // mask 0b000000000000000011111111 with `size` 1s.
-    let shift = u64::BITS - (size as u32);
-    let mask = (u64::MAX << shift) >> shift;
-
-    (!gamma) & mask
-}
-
-fn part2(input: &str) -> Result<u64> {
-    let binary_numbers: Vec<&str> = input.lines().collect();
-
-    // all binary numbers should have the same length
-    let size = binary_numbers[0].len();
-    #[cfg(debug_assertions)]
-    binary_numbers.iter().for_each(|num| {
-        debug_assert_eq!(num.len(), size);
-    });
-
-    let oxygen_generator_rating = compute_oxygen_generator_rating(&binary_numbers, size)?;
-    let co2_scrubber_rating = compute_co2_scrubber_rating(&binary_numbers, size)?;
-
-    Ok(oxygen_generator_rating * co2_scrubber_rating)
-}
-
-fn filter_by_strat<Strat>(binary_numbers: &[&str], size: usize, strat: Strat) -> Result<u64>
-where
-    Strat: Fn(bool) -> char,
-{
-    let mut numbers = binary_numbers.to_vec();
-
-    for pos in 0..size {
-        if numbers.len() == 1 {
-            // only one number left, we're done!
-            break;
-        }
-
-        let one_is_more_common = count_ones(&numbers, pos) >= numbers.len().div_ceil(2);
-        let digit_of_interest = strat(one_is_more_common);
-
-        numbers.retain(|number| number.chars().nth(pos).unwrap() == digit_of_interest);
-    }
-
-    debug_assert_eq!(numbers.len(), 1);
-
-    u64::from_str_radix(numbers[0], 2).context("couldn't parse binary number")
-}
-
-/// To find oxygen generator rating, determine the most common value (0 or 1) in the current bit
-/// position, and keep only numbers with that bit in that position. If 0 and 1 are equally common,
-/// keep values with a 1 in the position being considered.
-fn compute_oxygen_generator_rating(binary_numbers: &[&str], size: usize) -> Result<u64> {
-    filter_by_strat(binary_numbers, size, |one_is_more_common| {
-        if one_is_more_common {
-            '1'
-        } else {
-            '0'
-        }
-    })
-}
-
-/// To find CO2 scrubber rating, determine the least common value (0 or 1) in the current bit
-/// position, and keep only numbers with that bit in that position. If 0 and 1 are equally
-/// common, keep values with a 0 in the position being considered.
-fn compute_co2_scrubber_rating(binary_numbers: &[&str], size: usize) -> Result<u64> {
-    filter_by_strat(binary_numbers, size, |one_is_more_common| {
-        if one_is_more_common {
-            '0'
-        } else {
-            '1'
-        }
-    })
-}
-
-#[cfg(test)]
-mod tests {
-    use super::*;
-
-    const PROVIDED: &str = include_str!("../input/day03_provided.txt");
-
-    #[test]
-    fn part1_provided() {
-        let binary_numbers: Vec<&str> = PROVIDED.lines().collect();
-        let size = binary_numbers[0].len();
-
-        let gamma = compute_gamma(&binary_numbers, size);
-        assert_eq!(gamma, 22);
-
-        let epsilon = compute_epsilon(gamma, size);
-        assert_eq!(epsilon, 9);
-    }
-
-    #[test]
-    fn part1_real() {
-        assert_eq!(part1(INPUT).unwrap(), 3429254);
-    }
-
-    #[test]
-    fn part2_provided() {
-        let binary_numbers: Vec<&str> = PROVIDED.lines().collect();
-        let size = binary_numbers[0].len();
-
-        let oxygen_generator_rating =
-            compute_oxygen_generator_rating(&binary_numbers, size).unwrap();
-        assert_eq!(oxygen_generator_rating, 23);
-
-        let co2_scrubber_rating = compute_co2_scrubber_rating(&binary_numbers, size).unwrap();
-        assert_eq!(co2_scrubber_rating, 10);
-    }
-
-    #[test]
-    fn part2_real() {
-        assert_eq!(part2(INPUT).unwrap(), 5410338);
-    }
-}
diff --git a/aoc2021/src/day04.rs b/aoc2021/src/day04.rs
deleted file mode 100644
index d18cff5..0000000
--- a/aoc2021/src/day04.rs
+++ /dev/null
@@ -1,188 +0,0 @@
-use std::collections::HashMap;
-use std::fmt::Write;
-
-use anyhow::{anyhow, Context, Result};
-
-const INPUT: &str = include_str!("../input/day04.txt");
-
-const GRID_WIDTH: usize = 5;
-const GRID_HEIGHT: usize = 5;
-const GRID_SIZE: usize = GRID_WIDTH * GRID_HEIGHT;
-
-pub fn run() -> Result<String> {
-    let mut res = String::with_capacity(128);
-
-    writeln!(res, "part 1: {}", part1(INPUT)?)?;
-    writeln!(res, "part 2: {}", part2(INPUT)?)?;
-
-    Ok(res)
-}
-
-fn part1(input: &str) -> Result<u64> {
-    let (draws, grids) = input
-        .split_once("\n\n")
-        .context("couldn't split draws from grids")?;
-
-    let draws = draws
-        .split(',')
-        .map(|num| num.parse::<u8>().context("couldn't parse drawn number:"))
-        .collect::<Result<Vec<_>>>()?;
-    let mut grids = grids
-        .split("\n\n")
-        .map(str::parse::<Grid>)
-        .collect::<Result<Vec<_>>>()?;
-
-    let (mut wdraw, mut wgrid) = (None, None);
-
-    'draw_loop: for draw in draws {
-        for grid in &mut grids {
-            grid.mark(draw);
-            if grid.is_winning() {
-                wgrid = Some(grid.clone());
-                wdraw = Some(draw);
-                break 'draw_loop;
-            }
-        }
-    }
-
-    match (wdraw, wgrid) {
-        (Some(draw), Some(grid)) => {
-            Ok(draw as u64 * grid.unmarked_numbers().map(|n| n as u64).sum::<u64>())
-        }
-        _ => Err(anyhow!("couldn't find a winning grid!")),
-    }
-}
-
-fn part2(input: &str) -> Result<u64> {
-    let (draws, grids) = input
-        .split_once("\n\n")
-        .context("couldn't split draws from grids")?;
-
-    let draws = draws
-        .split(',')
-        .map(|num| num.parse::<u8>().context("couldn't parse drawn number:"))
-        .collect::<Result<Vec<_>>>()?;
-    let mut grids = grids
-        .split("\n\n")
-        .map(str::parse::<Grid>)
-        .collect::<Result<Vec<_>>>()?;
-
-    let mut draws = draws.into_iter();
-
-    while grids.len() > 1 {
-        let draw = draws
-            .next()
-            .context("no draws available, didn't find last grid")?;
-
-        // TODO: replace with drain_filter when stabilized
-        grids.iter_mut().for_each(|grid| grid.mark(draw));
-        grids.retain(|grid| !grid.is_winning());
-    }
-
-    let last_grid = &mut grids[0];
-
-    for draw in draws {
-        last_grid.mark(draw);
-        if last_grid.is_winning() {
-            return Ok(draw as u64 * last_grid.unmarked_numbers().map(|n| n as u64).sum::<u64>());
-        }
-    }
-
-    Err(anyhow!("last grid never wins, this is not expected"))
-}
-
-#[derive(Debug, Clone)]
-struct Grid {
-    number_to_pos: HashMap<u8, (usize, usize)>,
-    grid: [bool; GRID_SIZE],
-    rows: [u8; GRID_HEIGHT],
-    cols: [u8; GRID_WIDTH],
-    winning: bool,
-}
-
-impl Grid {
-    fn mark(&mut self, draw: u8) {
-        if let Some(&(x, y)) = self.number_to_pos.get(&draw) {
-            *self.access_grid_mut(x, y) = true;
-
-            self.rows[y] += 1;
-            self.cols[x] += 1;
-
-            self.winning =
-                self.rows[y] as usize == GRID_WIDTH || self.cols[x] as usize == GRID_HEIGHT;
-        }
-    }
-
-    fn is_winning(&self) -> bool {
-        self.winning
-    }
-
-    fn unmarked_numbers(&self) -> impl Iterator<Item = u8> + '_ {
-        self.number_to_pos
-            .iter()
-            .filter_map(|(num, &(x, y))| (!self.access_grid(x, y)).then_some(*num))
-    }
-
-    fn access_grid(&self, x: usize, y: usize) -> bool {
-        self.grid[y * GRID_HEIGHT + x]
-    }
-
-    fn access_grid_mut(&mut self, x: usize, y: usize) -> &mut bool {
-        &mut self.grid[y * GRID_HEIGHT + x]
-    }
-}
-
-impl std::str::FromStr for Grid {
-    type Err = anyhow::Error;
-
-    fn from_str(s: &str) -> Result<Self> {
-        let mut numbers = s.split_whitespace().map(str::parse);
-        let mut number_to_pos = HashMap::new();
-
-        for y in 0..GRID_HEIGHT {
-            for x in 0..GRID_WIDTH {
-                let pos = (x, y);
-                let number: u8 = numbers
-                    .next()
-                    .context("not enough numbers for grid")?
-                    .context("couldn't parse number:")?;
-                number_to_pos.insert(number, pos);
-            }
-        }
-
-        Ok(Grid {
-            number_to_pos,
-            grid: [false; GRID_SIZE],
-            rows: [0; GRID_HEIGHT],
-            cols: [0; GRID_WIDTH],
-            winning: false,
-        })
-    }
-}
-
-#[cfg(test)]
-mod tests {
-    use super::*;
-
-    const PROVIDED: &str = include_str!("../input/day04_provided.txt");
-
-    #[test]
-    fn part1_provided() {
-        assert_eq!(part1(PROVIDED).unwrap(), 4512);
-    }
-
-    #[test]
-    fn part1_real() {
-        assert_eq!(part1(INPUT).unwrap(), 45031);
-    }
-
-    #[test]
-    fn part2_provided() {
-        assert_eq!(part2(PROVIDED).unwrap(), 1924);
-    }
-
-    #[test]
-    fn part2_real() {
-        assert_eq!(part2(INPUT).unwrap(), 2568);
-    }
-}
diff --git a/aoc2021/src/day05.rs b/aoc2021/src/day05.rs
deleted file mode 100644
index c076deb..0000000
--- a/aoc2021/src/day05.rs
+++ /dev/null
@@ -1,177 +0,0 @@
-use std::cmp::Ordering;
-use std::collections::HashMap;
-use std::fmt::Write;
-
-use anyhow::{Context, Result};
-
-const INPUT: &str = include_str!("../input/day05.txt");
-
-pub fn run() -> Result<String> {
-    let mut res = String::with_capacity(128);
-
-    writeln!(res, "part 1: {}", part1(INPUT)?)?;
-    writeln!(res, "part 2: {}", part2(INPUT)?)?;
-
-    Ok(res)
-}
-
-fn part1(input: &str) -> Result<usize> {
-    let lines = input
-        .lines()
-        .map(str::parse::<Line>)
-        .collect::<Result<Vec<_>>>()?;
-
-    let mut grid = HashMap::new();
-
-    lines
-        .iter()
-        .filter(|l| l.is_horizontal() || l.is_vertical())
-        .for_each(|l| {
-            for cell in l.cells() {
-                *grid.entry(cell).or_insert(0) += 1;
-            }
-        });
-
-    Ok(grid.into_values().filter(|c| *c > 1).count())
-}
-
-fn part2(input: &str) -> Result<usize> {
-    let lines = input
-        .lines()
-        .map(str::parse::<Line>)
-        .collect::<Result<Vec<_>>>()?;
-
-    let mut grid = HashMap::new();
-
-    lines.iter().for_each(|l| {
-        for cell in l.cells() {
-            *grid.entry(cell).or_insert(0) += 1;
-        }
-    });
-
-    Ok(grid.into_values().filter(|c| *c > 1).count())
-}
-
-struct PointIterator {
-    current: (usize, usize),
-    to: (usize, usize),
-    dx: Ordering,
-    dy: Ordering,
-    done: bool,
-}
-
-impl PointIterator {
-    fn new(from: (usize, usize), to: (usize, usize)) -> Self {
-        Self {
-            current: from,
-            to,
-            dx: from.0.cmp(&to.0),
-            dy: from.1.cmp(&to.1),
-            done: false,
-        }
-    }
-}
-
-impl Iterator for PointIterator {
-    type Item = (usize, usize);
-
-    fn next(&mut self) -> Option<Self::Item> {
-        if self.done {
-            return None;
-        }
-
-        let (x, y) = self.current;
-
-        if x == self.to.0 && y == self.to.1 {
-            self.done = true;
-            return Some((x, y));
-        }
-
-        match self.dx {
-            Ordering::Less => self.current.0 += 1,
-            Ordering::Greater => self.current.0 -= 1,
-            Ordering::Equal => {}
-        }
-
-        match self.dy {
-            Ordering::Less => self.current.1 += 1,
-            Ordering::Greater => self.current.1 -= 1,
-            Ordering::Equal => {}
-        }
-
-        Some((x, y))
-    }
-}
-
-#[derive(Debug)]
-struct Line {
-    from: (usize, usize),
-    to: (usize, usize),
-}
-
-impl Line {
-    fn is_horizontal(&self) -> bool {
-        self.to.1 == self.from.1
-    }
-
-    fn is_vertical(&self) -> bool {
-        self.to.0 == self.from.0
-    }
-
-    fn cells(&self) -> impl Iterator<Item = (usize, usize)> {
-        PointIterator::new(self.from, self.to)
-    }
-}
-
-impl std::str::FromStr for Line {
-    type Err = anyhow::Error;
-
-    fn from_str(s: &str) -> Result<Self> {
-        let (from, to) = s
-            .split_once(" -> ")
-            .context("couldn't parse line: missing ` -> `")?;
-
-        let from = {
-            let (x, y) = from
-                .split_once(',')
-                .context("couldn't parse line origin: missing `,`")?;
-            (x.parse()?, y.parse()?)
-        };
-
-        let to = {
-            let (x, y) = to
-                .split_once(',')
-                .context("couldn't parse line end: missing `,`")?;
-            (x.parse()?, y.parse()?)
-        };
-
-        Ok(Line { from, to })
-    }
-}
-
-#[cfg(test)]
-mod tests {
-    use super::*;
-
-    const PROVIDED: &str = include_str!("../input/day05_provided.txt");
-
-    #[test]
-    fn part1_provided() {
-        assert_eq!(part1(PROVIDED).unwrap(), 5);
-    }
-
-    #[test]
-    fn part1_real() {
-        assert_eq!(part1(INPUT).unwrap(), 4745);
-    }
-
-    #[test]
-    fn part2_provided() {
-        assert_eq!(part2(PROVIDED).unwrap(), 12);
-    }
-
-    #[test]
-    fn part2_real() {
-        assert_eq!(part2(INPUT).unwrap(), 18442);
-    }
-}
diff --git a/aoc2021/src/day06.rs b/aoc2021/src/day06.rs
deleted file mode 100644
index e52d172..0000000
--- a/aoc2021/src/day06.rs
+++ /dev/null
@@ -1,101 +0,0 @@
-use std::collections::VecDeque;
-use std::fmt::Write;
-use std::str;
-
-use anyhow::Result;
-
-const INPUT: &str = include_str!("../input/day06.txt");
-
-const SPAWNING_DELAY: usize = 7;
-const TURNS_PART_1: usize = 80;
-const TURNS_PART_2: usize = 256;
-
-pub fn run() -> Result<String> {
-    let mut res = String::with_capacity(128);
-
-    writeln!(res, "part 1: {}", part1(INPUT)?)?;
-    writeln!(res, "part 2: {}", part2(INPUT)?)?;
-
-    Ok(res)
-}
-
-fn part1(input: &str) -> Result<usize> {
-    let mut school = input.trim().parse::<School>()?;
-
-    Ok(school.grow_for(TURNS_PART_1))
-}
-
-fn part2(input: &str) -> Result<usize> {
-    let mut school = input.trim().parse::<School>()?;
-
-    Ok(school.grow_for(TURNS_PART_2))
-}
-
-struct School {
-    fish_timers: VecDeque<usize>,
-}
-
-impl School {
-    fn next_turn(&mut self) {
-        let newly_spawned = self.fish_timers[0];
-
-        self.fish_timers.rotate_left(1);
-
-        self.fish_timers[SPAWNING_DELAY - 1] += newly_spawned;
-    }
-
-    fn size(&self) -> usize {
-        self.fish_timers.iter().sum()
-    }
-
-    fn grow_for(&mut self, turns: usize) -> usize {
-        for _ in 0..turns {
-            self.next_turn();
-        }
-
-        self.size()
-    }
-}
-
-impl std::str::FromStr for School {
-    type Err = anyhow::Error;
-
-    fn from_str(s: &str) -> Result<Self> {
-        let mut fish_timers = [0usize; SPAWNING_DELAY + 2];
-
-        for fish in s.split(',').map(str::parse::<usize>) {
-            fish_timers[fish?] += 1;
-        }
-
-        Ok(School {
-            fish_timers: fish_timers.into(),
-        })
-    }
-}
-
-#[cfg(test)]
-mod tests {
-    use super::*;
-
-    const PROVIDED: &str = include_str!("../input/day06_provided.txt");
-
-    #[test]
-    fn part1_provided() {
-        assert_eq!(part1(PROVIDED).unwrap(), 5934);
-    }
-
-    #[test]
-    fn part1_real() {
-        assert_eq!(part1(INPUT).unwrap(), 350149);
-    }
-
-    #[test]
-    fn part2_provided() {
-        assert_eq!(part2(PROVIDED).unwrap(), 26984457539);
-    }
-
-    #[test]
-    fn part2_real() {
-        assert_eq!(part2(INPUT).unwrap(), 1590327954513);
-    }
-}
diff --git a/aoc2021/src/day07.rs b/aoc2021/src/day07.rs
deleted file mode 100644
index ce5a56b..0000000
--- a/aoc2021/src/day07.rs
+++ /dev/null
@@ -1,169 +0,0 @@
-use std::fmt::Write;
-
-use anyhow::{Context, Result};
-use rand::Rng;
-
-const INPUT: &str = include_str!("../input/day07.txt");
-
-pub fn run() -> Result<String> {
-    let mut res = String::with_capacity(128);
-
-    writeln!(res, "part 1: {}", part1(INPUT)?)?;
-    writeln!(res, "part 2: {}", part2(INPUT)?)?;
-
-    Ok(res)
-}
-
-fn part1(input: &str) -> Result<u64> {
-    let mut horizontal_positions = input
-        .trim()
-        .split(',')
-        .map(|n| n.parse::<u64>().context("couldn't parse position"))
-        .collect::<Result<Vec<_>>>()?;
-
-    let median_rank = horizontal_positions.len() / 2;
-    let median = selection(&mut horizontal_positions, median_rank);
-
-    Ok(horizontal_positions
-        .iter()
-        // TODO: use abs_diff when stabilized
-        .map(|n| abs_diff(*n, median))
-        .sum())
-}
-
-fn selection<T>(data: &mut [T], i: usize) -> T
-where
-    T: Copy + Ord,
-{
-    if data.len() == 1 {
-        return data[0];
-    }
-
-    let mid = random_partition(data);
-
-    if i < mid {
-        selection(&mut data[..mid], i)
-    } else {
-        selection(&mut data[mid..], i - mid)
-    }
-}
-
-fn random_partition<T>(data: &mut [T]) -> usize
-where
-    T: Copy + Ord,
-{
-    let pivot_index = rand::thread_rng().gen_range(0..data.len());
-    let pivot = data[pivot_index];
-
-    let mut i = 0;
-    let mut j = data.len() - 1;
-
-    loop {
-        while data[i] < pivot {
-            i += 1;
-        }
-
-        while data[j] > pivot {
-            j -= 1;
-        }
-
-        if i >= j {
-            return usize::max(i, 1);
-        }
-
-        data.swap(i, j);
-        i += 1;
-        j -= 1;
-    }
-}
-
-fn part2(input: &str) -> Result<u64> {
-    let horizontal_positions = input
-        .trim()
-        .split(',')
-        .map(|n| n.parse::<u64>().context("couldn't parse position"))
-        .collect::<Result<Vec<_>>>()?;
-
-    let min = *horizontal_positions.iter().min().unwrap();
-    let max = *horizontal_positions.iter().max().unwrap();
-
-    let optimal_distance = minimize_binary_search(&horizontal_positions, min, max, part2_distance);
-    let minimum_fuel = horizontal_positions
-        .iter()
-        .map(|n| part2_distance(*n, optimal_distance))
-        .sum::<u64>();
-
-    Ok(minimum_fuel)
-}
-
-fn minimize_binary_search<F>(positions: &[u64], min: u64, max: u64, distance: F) -> u64
-where
-    F: Fn(u64, u64) -> u64,
-{
-    if min == max {
-        return min;
-    }
-
-    let mid1 = min + (max - min) / 2;
-    let mid2 = mid1 + 1;
-
-    let (cost1, cost2) = positions
-        .iter()
-        .map(|n| (distance(*n, mid1), distance(*n, mid2)))
-        .reduce(|(sum1, sum2), (x1, x2)| (sum1 + x1, sum2 + x2))
-        .unwrap();
-
-    if cost1 < cost2 {
-        minimize_binary_search(positions, min, mid1, distance)
-    } else {
-        minimize_binary_search(positions, mid2, max, distance)
-    }
-}
-
-fn abs_diff(a: u64, b: u64) -> u64 {
-    a.max(b) - a.min(b)
-}
-
-fn part2_distance(a: u64, b: u64) -> u64 {
-    let distance = abs_diff(a, b);
-
-    distance * (distance + 1) / 2
-}
-
-#[cfg(test)]
-mod tests {
-    use super::*;
-
-    const PROVIDED: &str = include_str!("../input/day07_provided.txt");
-
-    #[test]
-    fn part1_provided() {
-        assert_eq!(part1(PROVIDED).unwrap(), 37);
-    }
-
-    #[test]
-    fn part1_real() {
-        assert_eq!(part1(INPUT).unwrap(), 340056);
-    }
-
-    #[test]
-    fn part2_provided() {
-        assert_eq!(part2(PROVIDED).unwrap(), 168);
-    }
-
-    #[test]
-    fn part2_real() {
-        assert_eq!(part2(INPUT).unwrap(), 96592275);
-    }
-
-    #[test]
-    fn test_selection() {
-        for _ in 0..4200 {
-            for i in 0..=9 {
-                let mut data = vec![9, 2, 7, 3, 5, 4, 6, 1, 8, 0];
-                let res = selection(&mut data, i);
-                assert_eq!(res, i);
-            }
-        }
-    }
-}
diff --git a/aoc2021/src/day08.rs b/aoc2021/src/day08.rs
deleted file mode 100644
index f358720..0000000
--- a/aoc2021/src/day08.rs
+++ /dev/null
@@ -1,212 +0,0 @@
-use std::fmt::Write;
-
-use anyhow::{Context, Result};
-
-const INPUT: &str = include_str!("../input/day08.txt");
-
-pub fn run() -> Result<String> {
-    let mut res = String::with_capacity(128);
-
-    writeln!(res, "part 1: {}", part1(INPUT)?)?;
-    writeln!(res, "part 2: {}", part2(INPUT)?)?;
-
-    Ok(res)
-}
-
-fn part1(input: &str) -> Result<usize> {
-    let entries = input
-        .lines()
-        .map(TryInto::try_into)
-        .collect::<Result<Vec<Entry>>>()?;
-
-    Ok(entries.iter().map(Entry::count_easy_digits_in_output).sum())
-}
-
-fn part2(input: &str) -> Result<u64> {
-    let entries = input
-        .lines()
-        .map(TryInto::try_into)
-        .collect::<Result<Vec<Entry>>>()?;
-
-    let mut sum = 0;
-
-    for entry in entries {
-        let mapping = entry.compute_mapping()?;
-        sum += entry.decode_output(&mapping)?;
-    }
-
-    Ok(sum)
-}
-
-struct Entry<'a> {
-    four_digits_output: Vec<&'a str>,
-    unique_signals: Vec<&'a str>,
-}
-
-impl<'a> Entry<'a> {
-    fn count_easy_digits_in_output(&self) -> usize {
-        self.four_digits_output
-            .iter()
-            .filter_map(|digit| Self::translate_easy_digit(digit))
-            .count()
-    }
-
-    fn translate_easy_digit(digit: &str) -> Option<u64> {
-        match digit.len() {
-            2 => Some(1),
-            3 => Some(7),
-            4 => Some(4),
-            7 => Some(8),
-            _ => None,
-        }
-    }
-
-    fn compute_mapping(&self) -> Result<Vec<(&'a str, u64)>> {
-        let mut mapping = Vec::new();
-
-        // first, let's get the easy digits
-        let easy_digits: Vec<(&str, u64)> = self
-            .unique_signals
-            .iter()
-            .filter_map(|signal| Some(*signal).zip(Self::translate_easy_digit(signal)))
-            .collect();
-
-        // now we can get `9` for free: it's the signal that uses 6 segments and has 4 in common
-        // with the digit `4` (`6` and `0` also use 6 segments, but only have 3 segments in common
-        // with `4`).
-        let (four, _) = *easy_digits
-            .iter()
-            .find(|(_, translation)| *translation == 4)
-            .context("no signal found for the digit 4!")?;
-        let nine = *self
-            .unique_signals
-            .iter()
-            .filter(|signal| signal.len() == 6)
-            .find(|signal| four.chars().all(|c| signal.contains(c)))
-            .context("couldn't identify any signal corresponding to the digit 9!")?;
-        mapping.push((nine, 9));
-
-        // `0` has 2 segments in common with `1`, while `6` only has 1.
-        let (one, _) = *easy_digits
-            .iter()
-            .find(|(_, translation)| *translation == 1)
-            .context("no signal found for the digit 1!")?;
-        let zero = *self
-            .unique_signals
-            .iter()
-            .filter(|&signal| signal.len() == 6)
-            .filter(|&signal| *signal != nine)
-            .find(|signal| one.chars().all(|c| signal.contains(c)))
-            .context("couldn't identify any signal corresponding to the digit 0!")?;
-        mapping.push((zero, 0));
-
-        // `6` is an easy one now, the only other signal with 6 segments, that isn't nine or zero.
-        let six = *self
-            .unique_signals
-            .iter()
-            .filter(|signal| signal.len() == 6)
-            .find(|&signal| *signal != nine && *signal != zero)
-            .context("couldn't identify any signal corresponding to the digit 6!")?;
-        mapping.push((six, 6));
-
-        // `2`, `3` and `5` have 5 segments each.
-        //
-        // `3` has 2 segments in common with `1`.
-        let three = *self
-            .unique_signals
-            .iter()
-            .filter(|signal| signal.len() == 5)
-            .find(|signal| one.chars().all(|c| signal.contains(c)))
-            .context("couldn't identify any signal corresponding to the digit 3!")?;
-        mapping.push((three, 3));
-
-        // `5` has all its segments used in `6`, `2` doesn't.
-        let five = *self
-            .unique_signals
-            .iter()
-            .filter(|signal| signal.len() == 5)
-            .find(|signal| signal.chars().all(|c| six.contains(c)))
-            .context("couldn't identify any signal corresponding to the digit 5!")?;
-        mapping.push((five, 5));
-
-        // `2` is the last one!
-        let two = self
-            .unique_signals
-            .iter()
-            .filter(|signal| signal.len() == 5)
-            .find(|&signal| *signal != five && *signal != three)
-            .context("couldn't identify any signal corresponding to the digit 2!")?;
-        mapping.push((two, 2));
-
-        debug_assert_eq!(mapping.len(), 6);
-
-        Ok(mapping)
-    }
-
-    fn decode_output(&self, digit_mapping: &[(&str, u64)]) -> Result<u64> {
-        let mut res = 0;
-        for digit in &self.four_digits_output {
-            // search is kind of ugly, but having to sort everything is probably time consuming as
-            // well.
-            let digit = if let Some(translation) = Self::translate_easy_digit(digit) {
-                translation
-            } else {
-                *digit_mapping
-                    .iter()
-                    .find_map(|(signal, translation)| {
-                        if digit.len() == signal.len() && digit.chars().all(|c| signal.contains(c))
-                        {
-                            Some(translation)
-                        } else {
-                            None
-                        }
-                    })
-                    .with_context(|| format!("couldn't translate digit `{}`", digit))?
-            };
-
-            res = (res * 10) + digit;
-        }
-
-        Ok(res)
-    }
-}
-
-impl<'a> TryFrom<&'a str> for Entry<'a> {
-    type Error = anyhow::Error;
-
-    fn try_from(s: &'a str) -> Result<Self, Self::Error> {
-        let (signals, output) = s.split_once(" | ").context("couldn't split on ` | `")?;
-
-        Ok(Self {
-            four_digits_output: output.trim().split(' ').collect(),
-            unique_signals: signals.trim().split(' ').collect(),
-        })
-    }
-}
-
-#[cfg(test)]
-mod tests {
-    use super::*;
-
-    const PROVIDED: &str = include_str!("../input/day08_provided.txt");
-
-    #[test]
-    fn part1_provided() {
-        assert_eq!(part1(PROVIDED).unwrap(), 26);
-    }
-
-    #[test]
-    fn part1_real() {
-        assert_eq!(part1(INPUT).unwrap(), 488);
-    }
-
-    #[test]
-    fn part2_provided() {
-        assert_eq!(part2(PROVIDED).unwrap(), 61229);
-    }
-
-    #[test]
-    fn part2_real() {
-        assert_eq!(part2(INPUT).unwrap(), 1040429);
-    }
-}
diff --git a/aoc2021/src/day09.rs b/aoc2021/src/day09.rs
deleted file mode 100644
index 8b0d09a..0000000
--- a/aoc2021/src/day09.rs
+++ /dev/null
@@ -1,184 +0,0 @@
-use std::collections::HashSet;
-use std::fmt::Write;
-
-use anyhow::{Context, Result};
-
-const INPUT: &str = include_str!("../input/day09.txt");
-
-pub fn run() -> Result<String> {
-    let mut res = String::with_capacity(128);
-
-    writeln!(res, "part 1: {}", part1(INPUT)?)?;
-    writeln!(res, "part 2: {}", part2(INPUT)?)?;
-
-    Ok(res)
-}
-
-fn part1(input: &str) -> Result<u64> {
-    let height_map: HeightMap = input.parse()?;
-
-    Ok(height_map
-        .low_points()
-        .map(|(x, y)| height_map.risk_level(x, y))
-        .sum())
-}
-
-fn part2(input: &str) -> Result<u64> {
-    let mut height_map: HeightMap = input.parse()?;
-
-    let low_points: Vec<_> = height_map.low_points().collect();
-
-    let mut bassin_sizes: Vec<_> = low_points
-        .iter()
-        .map(|&(x, y)| height_map.fill_basin(x, y))
-        .collect();
-    bassin_sizes.sort_unstable();
-
-    bassin_sizes
-        .iter()
-        .copied()
-        .skip(bassin_sizes.len() - 3)
-        .reduce(|acc, elem| acc * elem)
-        .context("couldn't find 3 bassins")
-}
-
-#[derive(Clone, Copy)]
-enum Neighbour {
-    Up,
-    Down,
-    Left,
-    Right,
-}
-
-impl Neighbour {
-    fn apply(&self, x: usize, y: usize, width: usize, height: usize) -> Option<(usize, usize)> {
-        match self {
-            Neighbour::Left if x > 0 => Some((x - 1, y)),
-            Neighbour::Right if x < width - 1 => Some((x + 1, y)),
-            Neighbour::Up if y > 0 => Some((x, y - 1)),
-            Neighbour::Down if y < height - 1 => Some((x, y + 1)),
-            _ => None,
-        }
-    }
-
-    const ALL: &'static [Self] = &[
-        Neighbour::Left,
-        Neighbour::Right,
-        Neighbour::Up,
-        Neighbour::Down,
-    ];
-}
-
-#[derive(Debug)]
-struct HeightMap {
-    heights: Vec<u8>,
-    width: usize,
-    height: usize,
-    filled_points: HashSet<(usize, usize)>,
-}
-
-impl HeightMap {
-    fn fill_basin(&mut self, x: usize, y: usize) -> u64 {
-        if self.get(x, y) == 9 {
-            return 0;
-        }
-
-        if self.filled_points.contains(&(x, y)) {
-            return 0;
-        }
-        self.filled_points.insert((x, y));
-
-        self.neighbours(x, y)
-            .map(|(nx, ny)| self.fill_basin(nx, ny))
-            .sum::<u64>()
-            + 1
-    }
-
-    fn low_points(&self) -> impl Iterator<Item = (usize, usize)> + '_ {
-        (0..self.height)
-            .flat_map(|y| (0..self.width).map(move |x| (x, y)))
-            .filter(|&(x, y)| {
-                self.neighbours(x, y)
-                    .all(|(nx, ny)| self.get(x, y) < self.get(nx, ny))
-            })
-    }
-
-    fn neighbours(&self, x: usize, y: usize) -> impl Iterator<Item = (usize, usize)> + 'static {
-        let width = self.width;
-        let height = self.height;
-        Neighbour::ALL
-            .iter()
-            .copied()
-            .filter_map(move |neighbour| neighbour.apply(x, y, width, height))
-    }
-
-    fn risk_level(&self, x: usize, y: usize) -> u64 {
-        self.get(x, y) as u64 + 1
-    }
-
-    fn get(&self, x: usize, y: usize) -> u8 {
-        self.heights[y * self.width + x]
-    }
-}
-
-impl std::str::FromStr for HeightMap {
-    type Err = anyhow::Error;
-
-    fn from_str(s: &str) -> Result<Self> {
-        let mut heights = Vec::new();
-
-        let mut height = 0;
-        let mut width = None;
-        for line in s.lines().map(str::trim) {
-            let line = line
-                .chars()
-                .map(|chr| {
-                    chr.to_digit(10)
-                        .map(|digit| digit as u8)
-                        .with_context(|| format!("cannot parse char {} to digit", chr))
-                })
-                .collect::<Result<Vec<_>>>()?;
-
-            if width.is_none() {
-                width = Some(line.len());
-            }
-
-            height += 1;
-            heights.extend_from_slice(&line);
-        }
-
-        Ok(HeightMap {
-            heights,
-            width: width.context("0 lines parsed, width never computed")?,
-            height,
-            filled_points: HashSet::new(),
-        })
-    }
-}
-
-#[cfg(test)]
-mod tests {
-    use super::*;
-
-    const PROVIDED: &str = include_str!("../input/day09_provided.txt");
-
-    #[test]
-    fn part1_provided() {
-        assert_eq!(part1(PROVIDED).unwrap(), 15);
-    }
-
-    #[test]
-    fn part1_real() {
-        assert_eq!(part1(INPUT).unwrap(), 522);
-    }
-
-    #[test]
-    fn part2_provided() {
-        assert_eq!(part2(PROVIDED).unwrap(), 1134);
-    }
-
-    #[test]
-    fn part2_real() {
-        assert_eq!(part2(INPUT).unwrap(), 916688);
-    }
-}
diff --git a/aoc2021/src/day10.rs b/aoc2021/src/day10.rs
deleted file mode 100644
index 8ccacfb..0000000
--- a/aoc2021/src/day10.rs
+++ /dev/null
@@ -1,181 +0,0 @@
-use std::fmt::Write;
-
-use anyhow::{bail, Result};
-
-const INPUT: &str = include_str!("../input/day10.txt");
-
-pub fn run() -> Result<String> {
-    let mut res = String::with_capacity(128);
-
-    writeln!(res, "part 1: {}", part1(INPUT)?)?;
-    writeln!(res, "part 2: {}", part2(INPUT)?)?;
-
-    Ok(res)
-}
-
-fn part1(input: &str) -> Result<u64> {
-    let lines = input
-        .lines()
-        .map(str::parse::<Line>)
-        .collect::<Result<Vec<_>>>()?;
-
-    Ok(lines.iter().filter_map(Line::syntax_checking_score).sum())
-}
-
-fn part2(input: &str) -> Result<u64> {
-    let lines = input
-        .lines()
-        .map(str::parse::<Line>)
-        .collect::<Result<Vec<_>>>()?;
-
-    let mut scores: Vec<u64> = lines.iter().filter_map(Line::completion_score).collect();
-    scores.sort_unstable();
-
-    debug_assert!(scores.len() % 2 == 1);
-
-    Ok(scores[scores.len() / 2])
-}
-
-enum SymbolState {
-    Open(Symbol),
-    Close(Symbol),
-}
-
-impl TryFrom<char> for SymbolState {
-    type Error = anyhow::Error;
-
-    fn try_from(value: char) -> Result<Self> {
-        match value {
-            '(' | '[' | '{' | '<' => Ok(SymbolState::Open(value.try_into().unwrap())),
-            ')' | ']' | '}' | '>' => Ok(SymbolState::Close(value.try_into().unwrap())),
-            _ => bail!("invalid char for symbol"),
-        }
-    }
-}
-
-#[derive(PartialEq, Eq)]
-enum Symbol {
-    Parenthesis,  // ()
-    Bracket,      // []
-    Brace,        // {}
-    AngleBracket, // <>
-}
-
-impl Symbol {
-    fn syntax_checking_score(&self) -> u64 {
-        match self {
-            Symbol::Parenthesis => 3,
-            Symbol::Bracket => 57,
-            Symbol::Brace => 1197,
-            Symbol::AngleBracket => 25137,
-        }
-    }
-
-    fn completion_score(&self) -> u64 {
-        match self {
-            Symbol::Parenthesis => 1,
-            Symbol::Bracket => 2,
-            Symbol::Brace => 3,
-            Symbol::AngleBracket => 4,
-        }
-    }
-}
-
-impl TryFrom<char> for Symbol {
-    type Error = anyhow::Error;
-
-    fn try_from(value: char) -> Result<Self> {
-        match value {
-            '(' | ')' => Ok(Symbol::Parenthesis),
-            '[' | ']' => Ok(Symbol::Bracket),
-            '{' | '}' => Ok(Symbol::Brace),
-            '<' | '>' => Ok(Symbol::AngleBracket),
-            _ => bail!("invalid char for symbol"),
-        }
-    }
-}
-
-struct Line {
-    symbols: Vec<SymbolState>,
-}
-
-impl Line {
-    fn syntax_checking_score(&self) -> Option<u64> {
-        let mut stack = Vec::new();
-
-        for state in &self.symbols {
-            match state {
-                SymbolState::Open(symbol) => stack.push(symbol),
-                SymbolState::Close(symbol) => match stack.pop() {
-                    Some(other_symbol) if symbol == other_symbol => continue,
-                    _ => return Some(symbol.syntax_checking_score()),
-                },
-            }
-        }
-
-        None
-    }
-
-    fn completion_score(&self) -> Option<u64> {
-        let mut stack = Vec::new();
-
-        for state in &self.symbols {
-            match state {
-                SymbolState::Open(symbol) => stack.push(symbol),
-                SymbolState::Close(symbol) => match stack.pop() {
-                    Some(other_symbol) if symbol == other_symbol => continue,
-                    _ => return None, // ignore corrupt line
-                },
-            }
-        }
-
-        let mut score = 0;
-
-        for symbol in stack.into_iter().rev() {
-            score = score * 5 + symbol.completion_score();
-        }
-
-        Some(score)
-    }
-}
-
-impl std::str::FromStr for Line {
-    type Err = anyhow::Error;
-
-    fn from_str(s: &str) -> Result<Self> {
-        Ok(Line {
-            symbols: s
-                .trim()
-                .chars()
-                .map(TryFrom::try_from)
-                .collect::<Result<Vec<_>>>()?,
-        })
-    }
-}
-
-#[cfg(test)]
-mod tests {
-    use super::*;
-
-    const PROVIDED: &str = include_str!("../input/day10_provided.txt");
-
-    #[test]
-    fn part1_provided() {
-        assert_eq!(part1(PROVIDED).unwrap(), 26397);
-    }
-
-    #[test]
-    fn part1_real() {
-        assert_eq!(part1(INPUT).unwrap(), 394647);
-    }
-
-    #[test]
-    fn part2_provided() {
-        assert_eq!(part2(PROVIDED).unwrap(), 288957);
-    }
-
-    #[test]
-    fn part2_real() {
-        assert_eq!(part2(INPUT).unwrap(), 2380061249);
-    }
-}
diff --git a/aoc2021/src/day11.rs b/aoc2021/src/day11.rs
deleted file mode 100644
index 189032f..0000000
--- a/aoc2021/src/day11.rs
+++ /dev/null
@@ -1,236 +0,0 @@
-use std::fmt::Write;
-
-use anyhow::{Context, Result};
-
-const INPUT: &str = include_str!("../input/day11.txt");
-
-pub fn run() -> Result<String> {
-    let mut res = String::with_capacity(128);
-
-    writeln!(res, "part 1: {}", part1(INPUT)?)?;
-    writeln!(res, "part 2: {}", part2(INPUT)?)?;
-
-    Ok(res)
-}
-
-fn part1(input: &str) -> Result<usize> {
-    let mut grid: OctopusGrid = input.parse()?;
-
-    Ok((0..100).map(|_| grid.step()).sum())
-}
-
-fn part2(input: &str) -> Result<usize> {
-    let mut grid: OctopusGrid = input.parse()?;
-
-    let (_, step) = (0..)
-        .map(|step| (grid.step(), step))
-        .find(|(flashes, _)| *flashes == 100)
-        .context("never reached step where octopuses all flashed simultaneously")?;
-
-    Ok(step + 1)
-}
-
-#[derive(Clone, Copy, Debug)]
-struct Octopus {
-    energy_level: u8,
-    has_flashed: bool,
-}
-
-impl Octopus {
-    fn increment_energy_level(&mut self) {
-        self.energy_level += 1;
-    }
-
-    fn reset_energy_level(&mut self) {
-        if self.has_flashed {
-            self.energy_level = 0;
-            self.has_flashed = false;
-        }
-    }
-
-    fn flashes(&mut self) -> bool {
-        if self.energy_level > 9 && !self.has_flashed {
-            self.has_flashed = true;
-            return true;
-        }
-
-        false
-    }
-}
-
-impl TryFrom<char> for Octopus {
-    type Error = anyhow::Error;
-
-    fn try_from(value: char) -> Result<Self> {
-        Ok(Octopus {
-            energy_level: value
-                .to_digit(10)
-                .with_context(|| format!("couldn't convert char `{}` to digit", value))?
-                as u8,
-            has_flashed: false,
-        })
-    }
-}
-
-#[derive(Clone, Copy)]
-enum Neighbour {
-    Up,
-    Down,
-    Left,
-    Right,
-    UpperLeft,
-    UpperRight,
-    LowerLeft,
-    LowerRight,
-}
-
-impl Neighbour {
-    fn apply(&self, x: usize, y: usize, width: usize, height: usize) -> Option<(usize, usize)> {
-        match self {
-            Neighbour::Left if x > 0 => Some((x - 1, y)),
-            Neighbour::Right if x < width - 1 => Some((x + 1, y)),
-            Neighbour::Up if y > 0 => Some((x, y - 1)),
-            Neighbour::Down if y < height - 1 => Some((x, y + 1)),
-            Neighbour::UpperLeft => Neighbour::Left
-                .apply(x, y, width, height)
-                .and_then(|(x, y)| Neighbour::Up.apply(x, y, width, height)),
-            Neighbour::UpperRight => Neighbour::Right
-                .apply(x, y, width, height)
-                .and_then(|(x, y)| Neighbour::Up.apply(x, y, width, height)),
-            Neighbour::LowerLeft => Neighbour::Left
-                .apply(x, y, width, height)
-                .and_then(|(x, y)| Neighbour::Down.apply(x, y, width, height)),
-            Neighbour::LowerRight => Neighbour::Right
-                .apply(x, y, width, height)
-                .and_then(|(x, y)| Neighbour::Down.apply(x, y, width, height)),
-            _ => None,
-        }
-    }
-
-    const ALL: &'static [Self] = &[
-        Neighbour::Left,
-        Neighbour::Right,
-        Neighbour::Up,
-        Neighbour::Down,
-        Neighbour::UpperLeft,
-        Neighbour::UpperRight,
-        Neighbour::LowerLeft,
-        Neighbour::LowerRight,
-    ];
-}
-
-#[derive(Debug)]
-struct OctopusGrid {
-    octopuses: Vec<Octopus>,
-    width: usize,
-    height: usize,
-}
-
-impl OctopusGrid {
-    fn neighbours(&self, x: usize, y: usize) -> impl Iterator<Item = (usize, usize)> + 'static {
-        let width = self.width;
-        let height = self.height;
-        Neighbour::ALL
-            .iter()
-            .copied()
-            .filter_map(move |neighbour| neighbour.apply(x, y, width, height))
-    }
-
-    fn get_mut(&mut self, x: usize, y: usize) -> &mut Octopus {
-        &mut self.octopuses[y * self.width + x]
-    }
-
-    fn step(&mut self) -> usize {
-        // First, the energy level of each octopus increases by 1.
-        self.octopuses
-            .iter_mut()
-            .for_each(Octopus::increment_energy_level);
-
-        // Then, any octopus with an energy level greater than 9 flashes. This increases the energy
-        // level of all adjacent octopuses by 1, including octopuses that are diagonally adjacent.
-        // If this causes an octopus to have an energy level greater than 9, it also flashes. This
-        // process continues as long as new octopuses keep having their energy level increased
-        // beyond 9. (An octopus can only flash at most once per step.)
-        let mut flashed = true;
-        let mut flashes = 0;
-        while flashed {
-            flashed = false;
-            for index in 0..self.octopuses.len() {
-                if self.octopuses[index].flashes() {
-                    let (x, y) = (index % self.width, index / self.width);
-                    for (x, y) in self.neighbours(x, y) {
-                        self.get_mut(x, y).increment_energy_level();
-                    }
-
-                    flashed = true;
-                    flashes += 1;
-                }
-            }
-        }
-
-        // Finally, any octopus that flashed during this step has its energy level set to 0, as it
-        // used all of its energy to flash.
-        self.octopuses
-            .iter_mut()
-            .for_each(Octopus::reset_energy_level);
-
-        flashes
-    }
-}
-
-impl std::str::FromStr for OctopusGrid {
-    type Err = anyhow::Error;
-
-    fn from_str(s: &str) -> Result<Self, Self::Err> {
-        let mut octopuses = Vec::new();
-
-        let mut height = 0;
-        let mut width = None;
-        for line in s.lines().map(str::trim) {
-            let octopus_line = line
-                .chars()
-                .map(TryFrom::try_from)
-                .collect::<Result<Vec<_>>>()?;
-
-            if width.is_none() {
-                width = Some(octopus_line.len());
-            }
-
-            height += 1;
-            octopuses.extend_from_slice(&octopus_line);
-        }
-
-        Ok(OctopusGrid {
-            octopuses,
-            width: width.context("0 lines parsed, width never computed")?,
-            height,
-        })
-    }
-}
-
-#[cfg(test)]
-mod tests {
-    use super::*;
-
-    const PROVIDED: &str = include_str!("../input/day11_provided.txt");
-
-    #[test]
-    fn part1_provided() {
-        assert_eq!(part1(PROVIDED).unwrap(), 1656);
-    }
-
-    #[test]
-    fn part1_real() {
-        assert_eq!(part1(INPUT).unwrap(), 1588);
-    }
-
-    #[test]
-    fn part2_provided() {
-        assert_eq!(part2(PROVIDED).unwrap(), 195);
-    }
-
-    #[test]
-    fn part2_real() {
-        assert_eq!(part2(INPUT).unwrap(), 517);
-    }
-}
diff --git a/aoc2021/src/day12.rs b/aoc2021/src/day12.rs
deleted file mode 100644
index 4628a85..0000000
--- a/aoc2021/src/day12.rs
+++ /dev/null
@@ -1,199 +0,0 @@
-use std::collections::{HashMap, HashSet};
-use std::fmt::Write;
-
-use anyhow::{Context, Result};
-
-const INPUT: &str = include_str!("../input/day12.txt");
-
-pub fn run() -> Result<String> {
-    let mut res = String::with_capacity(128);
-
-    writeln!(res, "part 1: {}", part1(INPUT)?)?;
-    writeln!(res, "part 2: {}", part2(INPUT)?)?;
-
-    Ok(res)
-}
-
-fn part1(input: &str) -> Result<usize> {
-    let cave_map: CaveMap = input.try_into()?;
-
-    cave_map.count_paths()
-}
-
-fn part2(input: &str) -> Result<usize> {
-    let cave_map: CaveMap = input.try_into()?;
-
-    cave_map.count_paths_twice()
-}
-
-#[derive(Clone, Copy)]
-struct Cave<'a> {
-    name: &'a str,
-    small: bool,
-}
-
-impl<'a> Cave<'a> {
-    fn is_end(&self) -> bool {
-        self.name == "end"
-    }
-
-    fn is_start(&self) -> bool {
-        self.name == "start"
-    }
-
-    fn is_small(&self) -> bool {
-        self.small
-    }
-}
-
-impl<'a> From<&'a str> for Cave<'a> {
-    fn from(s: &'a str) -> Self {
-        Cave {
-            name: s,
-            small: s.chars().all(char::is_lowercase),
-        }
-    }
-}
-
-impl<'a> std::hash::Hash for Cave<'a> {
-    fn hash<H: std::hash::Hasher>(&self, state: &mut H) {
-        self.name.hash(state);
-    }
-}
-
-impl<'a> std::cmp::PartialEq for Cave<'a> {
-    fn eq(&self, other: &Self) -> bool {
-        self.name == other.name
-    }
-}
-impl<'a> std::cmp::Eq for Cave<'a> {}
-
-struct CaveMap<'a> {
-    connections: HashMap<Cave<'a>, Vec<Cave<'a>>>,
-}
-
-impl<'a> CaveMap<'a> {
-    fn count_paths(&self) -> Result<usize> {
-        let start = *self
-            .connections
-            .keys()
-            .find(|cave| cave.is_start())
-            .context("couldn't find starting cave")?;
-        Ok(self.count_paths_rec(start, HashSet::new()))
-    }
-
-    fn count_paths_rec(&self, from: Cave<'a>, mut small_seen: HashSet<Cave<'a>>) -> usize {
-        if from.is_end() {
-            return 1;
-        }
-
-        if from.is_small() {
-            if small_seen.contains(&from) {
-                return 0;
-            }
-            small_seen.insert(from);
-        }
-
-        let mut paths = 0;
-        for dst in &self.connections[&from] {
-            paths += self.count_paths_rec(*dst, small_seen.clone());
-        }
-
-        paths
-    }
-
-    fn count_paths_twice(&self) -> Result<usize> {
-        let start = *self
-            .connections
-            .keys()
-            .find(|cave| cave.is_start())
-            .context("couldn't find starting cave")?;
-        Ok(self.count_paths_twice_rec(start, HashSet::new(), false))
-    }
-
-    fn count_paths_twice_rec(
-        &self,
-        from: Cave<'a>,
-        mut small_seen: HashSet<Cave<'a>>,
-        visited_twice: bool,
-    ) -> usize {
-        if from.is_end() {
-            return 1;
-        }
-
-        if from.is_small() {
-            small_seen.insert(from);
-        }
-
-        let mut paths = 0;
-        for dst in &self.connections[&from] {
-            let will_visit_twice = small_seen.contains(dst) && dst.is_small();
-            if will_visit_twice && (visited_twice || dst.is_start()) {
-                continue;
-            }
-
-            paths += self.count_paths_twice_rec(
-                *dst,
-                small_seen.clone(),
-                visited_twice || will_visit_twice,
-            );
-        }
-
-        paths
-    }
-}
-
-impl<'a> TryFrom<&'a str> for CaveMap<'a> {
-    type Error = anyhow::Error;
-
-    fn try_from(s: &'a str) -> Result<Self> {
-        let mut map = HashMap::new();
-
-        for line in s.lines().map(str::trim) {
-            let (src, dst) = line
-                .split_once('-')
-                .context("couldn't parse cave connection")?;
-            map.entry(src.into())
-                .or_insert_with(Vec::new)
-                .push(dst.into());
-            map.entry(dst.into())
-                .or_insert_with(Vec::new)
-                .push(src.into());
-        }
-
-        Ok(CaveMap { connections: map })
-    }
-}
-
-#[cfg(test)]
-mod tests {
-    use super::*;
-
-    const PROVIDED1: &str = include_str!("../input/day12_provided1.txt");
-    const PROVIDED2: &str = include_str!("../input/day12_provided2.txt");
-    const PROVIDED3: &str = include_str!("../input/day12_provided3.txt");
-
-    #[test]
-    fn part1_provided() {
-        assert_eq!(part1(PROVIDED1).unwrap(), 10);
-        assert_eq!(part1(PROVIDED2).unwrap(), 19);
-        assert_eq!(part1(PROVIDED3).unwrap(), 226);
-    }
-
-    #[test]
-    fn part1_real() {
-        assert_eq!(part1(INPUT).unwrap(), 5252);
-    }
-
-    #[test]
-    fn part2_provided() {
-        assert_eq!(part2(PROVIDED1).unwrap(), 36);
-        assert_eq!(part2(PROVIDED2).unwrap(), 103);
-        assert_eq!(part2(PROVIDED3).unwrap(), 3509);
-    }
-
-    #[test]
-    fn part2_real() {
-        assert_eq!(part2(INPUT).unwrap(), 147784);
-    }
-}
diff --git a/aoc2021/src/day13.rs b/aoc2021/src/day13.rs
deleted file mode 100644
index 37f39f4..0000000
--- a/aoc2021/src/day13.rs
+++ /dev/null
@@ -1,210 +0,0 @@
-use std::collections::HashSet;
-use std::fmt::Write;
-
-use anyhow::{anyhow, Context, Result};
-
-const INPUT: &str = include_str!("../input/day13.txt");
-
-pub fn run() -> Result<String> {
-    let mut res = String::with_capacity(128);
-
-    writeln!(res, "part 1: {}", part1(INPUT)?)?;
-    writeln!(res, "part 2: {}", part2(INPUT)?)?;
-
-    Ok(res)
-}
-
-fn part1(input: &str) -> Result<usize> {
-    let (sheet, fold_instructions) = input.split_once("\n\n").context("couldn't split input")?;
-    let mut sheet: PaperSheet = sheet.parse()?;
-    let fold_instructions: Vec<FoldInstruction> = fold_instructions
-        .lines()
-        .map(|l| l.trim().parse())
-        .collect::<Result<_>>()?;
-
-    sheet.apply(
-        *fold_instructions
-            .first()
-            .context("had 0 fold instructions")?,
-    );
-
-    Ok(sheet.num_points())
-}
-
-fn part2(input: &str) -> Result<String> {
-    let (sheet, fold_instructions) = input.split_once("\n\n").context("couldn't split input")?;
-    let mut sheet: PaperSheet = sheet.parse()?;
-    let fold_instructions: Vec<FoldInstruction> = fold_instructions
-        .lines()
-        .map(|l| l.trim().parse())
-        .collect::<Result<_>>()?;
-
-    for instr in fold_instructions {
-        sheet.apply(instr);
-    }
-
-    Ok(format!("{}", sheet))
-}
-
-struct PaperSheet {
-    points: HashSet<(usize, usize)>,
-}
-
-impl PaperSheet {
-    fn apply(&mut self, instr: FoldInstruction) {
-        let mut to_insert = Vec::new();
-        let mut to_remove = Vec::new();
-
-        for point in &self.points {
-            match instr {
-                FoldInstruction::AlongX(x) => {
-                    if point.0 <= x {
-                        continue;
-                    }
-
-                    let new_point = (x - (point.0 - x), point.1);
-                    to_insert.push(new_point);
-                    to_remove.push(*point);
-                }
-                FoldInstruction::AlongY(y) => {
-                    if point.1 <= y {
-                        continue;
-                    }
-
-                    let new_point = (point.0, y - (point.1 - y));
-                    to_insert.push(new_point);
-                    to_remove.push(*point);
-                }
-            }
-        }
-
-        to_remove.iter().for_each(|point| {
-            self.points.remove(point);
-        });
-
-        to_insert.into_iter().for_each(|point| {
-            self.points.insert(point);
-        });
-    }
-
-    fn num_points(&self) -> usize {
-        self.points.len()
-    }
-}
-
-impl std::fmt::Display for PaperSheet {
-    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
-        // make sure first row appears on its own line
-        writeln!(f)?;
-
-        if self.points.is_empty() {
-            return writeln!(f, "`empty paper sheet`");
-        }
-
-        let (width, _) = self.points.iter().max_by_key(|point| point.0).unwrap();
-        let (_, height) = self.points.iter().max_by_key(|point| point.1).unwrap();
-
-        for y in 0..=*height {
-            for x in 0..=*width {
-                let chr = if self.points.contains(&(x, y)) {
-                    '#'
-                } else {
-                    '.'
-                };
-                f.write_char(chr)?;
-            }
-            writeln!(f)?;
-        }
-
-        Ok(())
-    }
-}
-
-impl std::str::FromStr for PaperSheet {
-    type Err = anyhow::Error;
-
-    fn from_str(s: &str) -> Result<Self> {
-        let mut points = HashSet::new();
-
-        for l in s.lines() {
-            let (x, y) = l
-                .trim()
-                .split_once(',')
-                .context("couldn't parse paper sheet point coordinate")?;
-            let (x, y) = (x.parse()?, y.parse()?);
-
-            points.insert((x, y));
-        }
-
-        Ok(PaperSheet { points })
-    }
-}
-
-#[derive(Clone, Copy)]
-enum FoldInstruction {
-    AlongX(usize),
-    AlongY(usize),
-}
-
-impl std::str::FromStr for FoldInstruction {
-    type Err = anyhow::Error;
-
-    fn from_str(s: &str) -> Result<Self> {
-        let (axis, coord) = s
-            .split_once('=')
-            .context("couldn't parse folding instruction")?;
-        let coord = coord.parse()?;
-
-        match axis {
-            "fold along x" => Ok(FoldInstruction::AlongX(coord)),
-            "fold along y" => Ok(FoldInstruction::AlongY(coord)),
-            _ => Err(anyhow!("couldn't parse folding instruction")),
-        }
-    }
-}
-
-#[cfg(test)]
-mod tests {
-    use super::*;
-
-    const PROVIDED: &str = include_str!("../input/day13_provided.txt");
-
-    #[test]
-    fn part1_provided() {
-        assert_eq!(part1(PROVIDED).unwrap(), 17);
-    }
-
-    #[test]
-    fn part1_real() {
-        assert_eq!(part1(INPUT).unwrap(), 753);
-    }
-
-    #[test]
-    fn part2_provided() {
-        assert_eq!(
-            part2(PROVIDED).unwrap(),
-            "
-#####
-#...#
-#...#
-#...#
-#####
-"
-        );
-    }
-
-    #[test]
-    fn part2_real() {
-        assert_eq!(
-            part2(INPUT).unwrap(),
-            "
-#..#.####.#....####.#..#...##.###..#..#
-#..#....#.#....#....#..#....#.#..#.#.#.
-####...#..#....###..####....#.#..#.##..
-#..#..#...#....#....#..#....#.###..#.#.
-#..#.#....#....#....#..#.#..#.#.#..#.#.
-#..#.####.####.####.#..#..##..#..#.#..#
-"
-        );
-    }
-}
diff --git a/aoc2021/src/day14.rs b/aoc2021/src/day14.rs
deleted file mode 100644
index feaf38e..0000000
--- a/aoc2021/src/day14.rs
+++ /dev/null
@@ -1,173 +0,0 @@
-use std::collections::HashMap;
-use std::fmt::Write;
-
-use anyhow::{Context, Result};
-
-const INPUT: &str = include_str!("../input/day14.txt");
-
-pub fn run() -> Result<String> {
-    let mut res = String::with_capacity(128);
-
-    writeln!(res, "part 1: {}", part1(INPUT)?)?;
-    writeln!(res, "part 2: {}", part2(INPUT)?)?;
-
-    Ok(res)
-}
-
-fn part1(input: &str) -> Result<usize> {
-    let (polymer, rules) = input.split_once("\n\n").context("couldn't split input")?;
-    let mut polymer: Polymer = polymer.parse()?;
-    let rules: Rules = rules.parse()?;
-
-    for _ in 0..10 {
-        polymer.insert_pairs(&rules.0)?;
-    }
-
-    let occurrences = polymer.compute_occurrences();
-
-    let (_, least_common_occurrences) = occurrences
-        .iter()
-        .min_by_key(|&(_, occurrences)| occurrences)
-        .unwrap();
-    let (_, most_common_occurrences) = occurrences
-        .iter()
-        .max_by_key(|&(_, occurrences)| occurrences)
-        .unwrap();
-
-    Ok(most_common_occurrences - least_common_occurrences)
-}
-
-fn part2(input: &str) -> Result<usize> {
-    let (polymer, rules) = input.split_once("\n\n").context("couldn't split input")?;
-    let mut polymer: Polymer = polymer.parse()?;
-    let rules: Rules = rules.parse()?;
-
-    for _ in 0..40 {
-        polymer.insert_pairs(&rules.0)?;
-    }
-
-    let occurrences = polymer.compute_occurrences();
-
-    let (_, least_common_occurrences) = occurrences
-        .iter()
-        .min_by_key(|&(_, occurrences)| occurrences)
-        .unwrap();
-    let (_, most_common_occurrences) = occurrences
-        .iter()
-        .max_by_key(|&(_, occurrences)| occurrences)
-        .unwrap();
-
-    Ok(most_common_occurrences - least_common_occurrences)
-}
-
-struct Rules(HashMap<(u8, u8), u8>);
-
-impl std::str::FromStr for Rules {
-    type Err = anyhow::Error;
-
-    fn from_str(s: &str) -> Result<Self> {
-        Ok(Self(
-            s.lines()
-                .map(str::trim)
-                .map(|l| {
-                    let (pair, res) = l.split_once(" -> ").context("couldn't parse rule")?;
-                    Ok((
-                        (
-                            *pair.as_bytes().first().context("couldn't parse rule")?,
-                            *pair.as_bytes().get(1).context("couldn't parse rule")?,
-                        ),
-                        res.bytes().next().context("couldn't parse rule")?,
-                    ))
-                })
-                .collect::<Result<_>>()?,
-        ))
-    }
-}
-
-#[derive(Debug)]
-struct Polymer {
-    molecules: HashMap<(u8, u8), usize>,
-    first: u8,
-    last: u8,
-}
-
-impl Polymer {
-    fn insert_pairs(&mut self, rules: &HashMap<(u8, u8), u8>) -> Result<()> {
-        let mut new_molecules = HashMap::new();
-
-        for (&(a, b), &count) in &self.molecules {
-            let middle = *rules
-                .get(&(a, b))
-                .with_context(|| format!("couldn't find rule for pair ({}, {})", a, b))?;
-
-            *new_molecules.entry((a, middle)).or_insert(0) += count;
-            *new_molecules.entry((middle, b)).or_insert(0) += count;
-        }
-
-        self.molecules = new_molecules;
-
-        Ok(())
-    }
-
-    fn compute_occurrences(&self) -> Vec<(u8, usize)> {
-        let mut counts = HashMap::new();
-
-        for (&(a, b), &count) in &self.molecules {
-            *counts.entry(a).or_insert(0) += count;
-            *counts.entry(b).or_insert(0) += count;
-        }
-
-        // the first and last molecule are only counted once, all other molecules are counted twice
-        *counts.entry(self.first).or_insert(0) += 1;
-        *counts.entry(self.last).or_insert(0) += 1;
-
-        counts
-            .into_iter()
-            .map(|(m, count)| (m, count / 2))
-            .collect()
-    }
-}
-
-impl std::str::FromStr for Polymer {
-    type Err = anyhow::Error;
-
-    fn from_str(s: &str) -> Result<Self> {
-        let mut molecules = HashMap::new();
-        s.as_bytes()
-            .windows(2)
-            .for_each(|w| *molecules.entry((w[0], w[1])).or_insert(0) += 1);
-
-        Ok(Polymer {
-            molecules,
-            first: *s.as_bytes().first().context("polymer was empty")?,
-            last: *s.as_bytes().last().context("polymer was empty")?,
-        })
-    }
-}
-
-#[cfg(test)]
-mod tests {
-    use super::*;
-
-    const PROVIDED: &str = include_str!("../input/day14_provided.txt");
-
-    #[test]
-    fn part1_provided() {
-        assert_eq!(part1(PROVIDED).unwrap(), 1588);
-    }
-
-    #[test]
-    fn part1_real() {
-        assert_eq!(part1(INPUT).unwrap(), 3247);
-    }
-
-    #[test]
-    fn part2_provided() {
-        assert_eq!(part2(PROVIDED).unwrap(), 2188189693529);
-    }
-
-    #[test]
-    fn part2_real() {
-        assert_eq!(part2(INPUT).unwrap(), 4110568157153);
-    }
-}
diff --git a/aoc2021/src/day15.rs b/aoc2021/src/day15.rs
deleted file mode 100644
index e8a3a18..0000000
--- a/aoc2021/src/day15.rs
+++ /dev/null
@@ -1,218 +0,0 @@
-use std::cmp::Reverse;
-use std::collections::BinaryHeap;
-use std::fmt::Write;
-
-use anyhow::{Context, Result};
-
-const INPUT: &str = include_str!("../input/day15.txt");
-
-pub fn run() -> Result<String> {
-    let mut res = String::with_capacity(128);
-
-    writeln!(res, "part 1: {}", part1(INPUT)?)?;
-    writeln!(res, "part 2: {}", part2(INPUT)?)?;
-
-    Ok(res)
-}
-
-fn part1(input: &str) -> Result<u64> {
-    let cavern: CavernMap = input.parse()?;
-
-    let lowest_risk = cavern.lowest_risk_path();
-
-    Ok(lowest_risk)
-}
-
-fn part2(input: &str) -> Result<u64> {
-    let cavern: CavernMap = input.parse()?;
-    let cavern = cavern.bigger();
-
-    let lowest_risk = cavern.lowest_risk_path();
-
-    Ok(lowest_risk)
-}
-
-#[derive(Debug)]
-struct CavernMap {
-    height: usize,
-    width: usize,
-    risk: Vec<u64>,
-}
-
-impl CavernMap {
-    // typical Dijkstra implementation, using a binary heap as a priority queue
-    fn lowest_risk_path(&self) -> u64 {
-        let mut visited = Vec::new();
-        visited.resize(self.height * self.width, false);
-        let mut total_risk = Vec::new();
-        total_risk.resize(self.height * self.width, u64::MAX);
-        total_risk[self.index(0, 0)] = 0;
-
-        let mut queue = BinaryHeap::new();
-        queue.push(Reverse((0, (0, 0))));
-
-        while !queue.is_empty() {
-            let Reverse((curr_risk, (x, y))) = queue.pop().unwrap();
-            debug_assert_eq!(curr_risk, total_risk[self.index(x, y)]);
-
-            if (x, y) == (self.width - 1, self.height - 1) {
-                // reached destination, we're done!
-                break;
-            }
-
-            if visited[self.index(x, y)] {
-                // duplicate entry in queue, discard
-                continue;
-            }
-            visited[self.index(x, y)] = true;
-
-            for (nx, ny) in self.neighbours(x, y) {
-                let neighbour_index = self.index(nx, ny);
-                let old_risk = total_risk[neighbour_index];
-                let new_risk = curr_risk + self.risk[neighbour_index];
-
-                if new_risk < old_risk {
-                    total_risk[neighbour_index] = new_risk;
-                    // we don't delete older queue entries for the same cell, if we find them later
-                    // on we can just skip them because they're marked as visited already
-                    queue.push(Reverse((new_risk, (nx, ny))));
-                }
-            }
-        }
-
-        *total_risk.last().unwrap()
-    }
-
-    fn neighbours(&self, x: usize, y: usize) -> impl Iterator<Item = (usize, usize)> + 'static {
-        let width = self.width;
-        let height = self.height;
-        Neighbour::ALL
-            .iter()
-            .copied()
-            .filter_map(move |neighbour| neighbour.apply(x, y, width, height))
-    }
-
-    fn index(&self, x: usize, y: usize) -> usize {
-        y * self.width + x
-    }
-
-    fn bigger(self) -> Self {
-        let width = self.width * 5;
-        let height = self.height * 5;
-        let mut risk = self.risk.clone();
-        risk.resize(width * height, 0);
-
-        for shift_y in 0..5 {
-            for shift_x in 0..5 {
-                for y in 0..self.height {
-                    for x in 0..self.width {
-                        let new_y = shift_y * self.height + y;
-                        let new_x = shift_x * self.width + x;
-                        let new_index = new_y * width + new_x;
-
-                        let old_risk = self.risk[self.index(x, y)];
-                        let mut new_risk = old_risk + shift_x as u64 + shift_y as u64;
-                        if new_risk > 9 {
-                            new_risk -= 9;
-                        }
-                        risk[new_index] = new_risk;
-                    }
-                }
-            }
-        }
-
-        Self {
-            height,
-            width,
-            risk,
-        }
-    }
-}
-
-impl std::str::FromStr for CavernMap {
-    type Err = anyhow::Error;
-
-    fn from_str(s: &str) -> Result<Self> {
-        let mut risk = Vec::new();
-
-        let mut height = 0;
-        let mut width = None;
-        for line in s.lines().map(str::trim) {
-            let line = line
-                .chars()
-                .map(|chr| {
-                    chr.to_digit(10)
-                        .map(|digit| digit as u64)
-                        .with_context(|| format!("cannot parse char {} to digit", chr))
-                })
-                .collect::<Result<Vec<_>>>()?;
-
-            if width.is_none() {
-                width = Some(line.len());
-            }
-
-            height += 1;
-            risk.extend_from_slice(&line);
-        }
-
-        Ok(CavernMap {
-            height,
-            width: width.context("0 lines parsed, width never computed")?,
-            risk,
-        })
-    }
-}
-
-#[derive(Clone, Copy)]
-enum Neighbour {
-    Up,
-    Down,
-    Left,
-    Right,
-}
-
-impl Neighbour {
-    fn apply(&self, x: usize, y: usize, width: usize, height: usize) -> Option<(usize, usize)> {
-        match self {
-            Neighbour::Left if x > 0 => Some((x - 1, y)),
-            Neighbour::Right if x < width - 1 => Some((x + 1, y)),
-            Neighbour::Up if y > 0 => Some((x, y - 1)),
-            Neighbour::Down if y < height - 1 => Some((x, y + 1)),
-            _ => None,
-        }
-    }
-
-    const ALL: &'static [Self] = &[
-        Neighbour::Left,
-        Neighbour::Right,
-        Neighbour::Up,
-        Neighbour::Down,
-    ];
-}
-
-#[cfg(test)]
-mod tests {
-    use super::*;
-
-    const PROVIDED: &str = include_str!("../input/day15_provided.txt");
-
-    #[test]
-    fn part1_provided() {
-        assert_eq!(part1(PROVIDED).unwrap(), 40);
-    }
-
-    #[test]
-    fn part1_real() {
-        assert_eq!(part1(INPUT).unwrap(), 562);
-    }
-
-    #[test]
-    fn part2_provided() {
-        assert_eq!(part2(PROVIDED).unwrap(), 315);
-    }
-
-    #[test]
-    fn part2_real() {
-        assert_eq!(part2(INPUT).unwrap(), 2874);
-    }
-}
diff --git a/aoc2021/src/day16.rs b/aoc2021/src/day16.rs
deleted file mode 100644
index c744926..0000000
--- a/aoc2021/src/day16.rs
+++ /dev/null
@@ -1,345 +0,0 @@
-use std::fmt::Write;
-use std::ops::Range;
-
-use anyhow::{bail, Context, Result};
-use bitvec::prelude::*;
-
-const INPUT: &str = include_str!("../input/day16.txt");
-
-pub fn run() -> Result<String> {
-    let mut res = String::with_capacity(128);
-
-    writeln!(res, "part 1: {}", part1(INPUT)?)?;
-    writeln!(res, "part 2: {}", part2(INPUT)?)?;
-
-    Ok(res)
-}
-
-fn part1(input: &str) -> Result<u64> {
-    let packet: Packet = input.parse()?;
-
-    Ok(packet.version_sum())
-}
-
-fn part2(input: &str) -> Result<u64> {
-    let packet: Packet = input.parse()?;
-
-    Ok(packet.value())
-}
-
-#[derive(PartialEq, Eq, Debug)]
-enum PacketType {
-    Litteral(LitteralPacket),
-    Operator(OperatorPacket),
-}
-
-#[derive(PartialEq, Eq, Debug)]
-struct Packet {
-    version: u8,
-    type_id: u8,
-    bits_used: usize,
-    packet: PacketType,
-}
-
-impl Packet {
-    fn version_sum(&self) -> u64 {
-        let version = self.version as u64;
-        match &self.packet {
-            PacketType::Litteral(_) => version,
-            PacketType::Operator(op) => {
-                version + op.sub_packets.iter().map(Packet::version_sum).sum::<u64>()
-            }
-        }
-    }
-
-    fn value(&self) -> u64 {
-        match &self.packet {
-            PacketType::Litteral(lit) => lit.value,
-            PacketType::Operator(op) => match op.op_type {
-                OperatorType::Sum => op.sub_packets.iter().map(Packet::value).sum(),
-                OperatorType::Product => op.sub_packets.iter().map(Packet::value).product(),
-                OperatorType::Minimum => op.sub_packets.iter().map(Packet::value).min().unwrap(),
-                OperatorType::Maximum => op.sub_packets.iter().map(Packet::value).max().unwrap(),
-                OperatorType::GreaterThan => {
-                    debug_assert_eq!(op.sub_packets.len(), 2);
-                    let pack1 = &op.sub_packets[0];
-                    let pack2 = &op.sub_packets[1];
-                    u64::from(pack1.value() > pack2.value())
-                }
-                OperatorType::LessThan => {
-                    debug_assert_eq!(op.sub_packets.len(), 2);
-                    let pack1 = &op.sub_packets[0];
-                    let pack2 = &op.sub_packets[1];
-                    u64::from(pack1.value() < pack2.value())
-                }
-                OperatorType::EqualTo => {
-                    debug_assert_eq!(op.sub_packets.len(), 2);
-                    let pack1 = &op.sub_packets[0];
-                    let pack2 = &op.sub_packets[1];
-                    u64::from(pack1.value() == pack2.value())
-                }
-            },
-        }
-    }
-}
-
-#[derive(PartialEq, Eq, Debug)]
-struct LitteralPacket {
-    value: u64,
-}
-
-#[derive(PartialEq, Eq, Debug)]
-enum OperatorType {
-    Sum,
-    Product,
-    Minimum,
-    Maximum,
-    GreaterThan,
-    LessThan,
-    EqualTo,
-}
-
-#[derive(PartialEq, Eq, Debug)]
-struct OperatorPacket {
-    sub_packets: Vec<Packet>,
-    op_type: OperatorType,
-}
-
-impl std::str::FromStr for Packet {
-    type Err = anyhow::Error;
-
-    fn from_str(s: &str) -> Result<Self> {
-        let s = s.trim();
-        let mut bits = BitVec::<usize, Msb0>::new();
-        bits.resize(4 * s.len(), false);
-
-        for (i, c) in s.chars().enumerate() {
-            let bit_index = i * 4;
-            let digit = c.to_digit(16).context("character wasn't hex digit")?;
-            bits[bit_index..(bit_index + 4)].store(digit);
-        }
-
-        bits.as_bitslice().try_into()
-    }
-}
-
-const VERSION_RANGE: Range<usize> = 0..3;
-const TYPE_ID_RANGE: Range<usize> = 3..6;
-
-const TYPE_LENGTH_ID_INDEX: usize = 6;
-const LENGTH_INDEX: usize = 6 + 1;
-
-const TLID0_SUBPACKET_LENGTH_BITS: usize = 15;
-const SUBPACKET_START_INDEX_TLID0: usize = LENGTH_INDEX + TLID0_SUBPACKET_LENGTH_BITS;
-const SUBPACKETS_BIT_LENGTH_RANGE: Range<usize> = LENGTH_INDEX..SUBPACKET_START_INDEX_TLID0;
-
-const TLID1_SUBPACKET_NUMBER_BITS: usize = 11;
-const SUBPACKET_START_INDEX_TLID1: usize = LENGTH_INDEX + TLID1_SUBPACKET_NUMBER_BITS;
-const SUBPACKETS_NUMBER_RANGE: Range<usize> = LENGTH_INDEX..SUBPACKET_START_INDEX_TLID1;
-
-impl<'bits, Store> TryFrom<&'bits BitSlice<Store, Msb0>> for Packet
-where
-    Store: BitStore,
-{
-    type Error = anyhow::Error;
-
-    fn try_from(bits: &'bits BitSlice<Store, Msb0>) -> Result<Self> {
-        let version: u8 = bits[VERSION_RANGE].load_be();
-        let type_id: u8 = bits[TYPE_ID_RANGE].load_be();
-
-        match type_id {
-            // LitteralPacket
-            4 => {
-                let mut value = 0;
-                let mut end = None;
-                for i in (6..).step_by(5) {
-                    let val = bits[(i + 1)..(i + 5)].load_be::<u64>();
-                    value = (value << 4) + val;
-
-                    if !bits[i] {
-                        end = Some(i + 5);
-                        break;
-                    }
-                }
-
-                Ok(Packet {
-                    version,
-                    type_id,
-                    bits_used: end.unwrap(),
-                    packet: PacketType::Litteral(LitteralPacket { value }),
-                })
-            }
-            // OperatorPacket
-            _ => {
-                let length_type_id = bits[TYPE_LENGTH_ID_INDEX];
-                let mut sub_packets = Vec::new();
-                let len = if length_type_id {
-                    let subpacket_num: usize = bits[SUBPACKETS_NUMBER_RANGE].load_be();
-                    let mut start_index = SUBPACKET_START_INDEX_TLID1;
-
-                    while sub_packets.len() < subpacket_num {
-                        let packet: Packet = bits[start_index..].try_into()?;
-                        start_index += packet.bits_used;
-                        sub_packets.push(packet);
-                    }
-
-                    start_index
-                } else {
-                    let length: usize = bits[SUBPACKETS_BIT_LENGTH_RANGE].load_be();
-
-                    let mut start_index = SUBPACKET_START_INDEX_TLID0;
-                    while start_index != SUBPACKET_START_INDEX_TLID0 + length {
-                        let packet: Packet = bits[start_index..].try_into()?;
-                        start_index += packet.bits_used;
-                        sub_packets.push(packet);
-                    }
-
-                    SUBPACKET_START_INDEX_TLID0 + length
-                };
-
-                let op_type = match type_id {
-                    0 => OperatorType::Sum,
-                    1 => OperatorType::Product,
-                    2 => OperatorType::Minimum,
-                    3 => OperatorType::Maximum,
-                    4 => unreachable!("impossible, would parse as a litteral packet"),
-                    5 => OperatorType::GreaterThan,
-                    6 => OperatorType::LessThan,
-                    7 => OperatorType::EqualTo,
-                    _ => bail!("unknown type id: {}", type_id),
-                };
-
-                Ok(Packet {
-                    version,
-                    type_id,
-                    bits_used: len,
-                    packet: PacketType::Operator(OperatorPacket {
-                        sub_packets,
-                        op_type,
-                    }),
-                })
-            }
-        }
-    }
-}
-
-#[cfg(test)]
-mod tests {
-    use super::*;
-
-    const PART1_PROVIDED1: &str = "D2FE28";
-    const PART1_PROVIDED2: &str = "38006F45291200";
-    const PART1_PROVIDED3: &str = "EE00D40C823060";
-
-    const PART1_PROVIDED4: &str = "8A004A801A8002F478";
-    const PART1_PROVIDED5: &str = "620080001611562C8802118E34";
-    const PART1_PROVIDED6: &str = "C0015000016115A2E0802F182340";
-    const PART1_PROVIDED7: &str = "A0016C880162017C3686B18A3D4780";
-
-    #[test]
-    fn part1_provided() {
-        assert_eq!(
-            PART1_PROVIDED1.parse::<Packet>().unwrap(),
-            Packet {
-                version: 6,
-                type_id: 4,
-                bits_used: 21,
-                packet: PacketType::Litteral(LitteralPacket { value: 2021 }),
-            }
-        );
-
-        assert_eq!(
-            PART1_PROVIDED2.parse::<Packet>().unwrap(),
-            Packet {
-                version: 1,
-                type_id: 6,
-                bits_used: 49,
-                packet: PacketType::Operator(OperatorPacket {
-                    sub_packets: vec![
-                        Packet {
-                            version: 6,
-                            type_id: 4,
-                            bits_used: 11,
-                            packet: PacketType::Litteral(LitteralPacket { value: 10 })
-                        },
-                        Packet {
-                            version: 2,
-                            type_id: 4,
-                            bits_used: 16,
-                            packet: PacketType::Litteral(LitteralPacket { value: 20 })
-                        },
-                    ],
-                    op_type: OperatorType::LessThan,
-                }),
-            }
-        );
-
-        assert_eq!(
-            PART1_PROVIDED3.parse::<Packet>().unwrap(),
-            Packet {
-                version: 7,
-                type_id: 3,
-                bits_used: 51,
-                packet: PacketType::Operator(OperatorPacket {
-                    sub_packets: vec![
-                        Packet {
-                            version: 2,
-                            type_id: 4,
-                            bits_used: 11,
-                            packet: PacketType::Litteral(LitteralPacket { value: 1 })
-                        },
-                        Packet {
-                            version: 4,
-                            type_id: 4,
-                            bits_used: 11,
-                            packet: PacketType::Litteral(LitteralPacket { value: 2 })
-                        },
-                        Packet {
-                            version: 1,
-                            type_id: 4,
-                            bits_used: 11,
-                            packet: PacketType::Litteral(LitteralPacket { value: 3 })
-                        },
-                    ],
-                    op_type: OperatorType::Maximum,
-                }),
-            }
-        );
-
-        assert_eq!(PART1_PROVIDED4.parse::<Packet>().unwrap().version_sum(), 16);
-        assert_eq!(PART1_PROVIDED5.parse::<Packet>().unwrap().version_sum(), 12);
-        assert_eq!(PART1_PROVIDED6.parse::<Packet>().unwrap().version_sum(), 23);
-        assert_eq!(PART1_PROVIDED7.parse::<Packet>().unwrap().version_sum(), 31);
-    }
-
-    #[test]
-    fn part1_real() {
-        assert_eq!(part1(INPUT).unwrap(), 925);
-    }
-
-    const PART2_PROVIDED1: &str = "C200B40A82";
-    const PART2_PROVIDED2: &str = "04005AC33890";
-    const PART2_PROVIDED3: &str = "880086C3E88112";
-    const PART2_PROVIDED4: &str = "CE00C43D881120";
-    const PART2_PROVIDED5: &str = "D8005AC2A8F0";
-    const PART2_PROVIDED6: &str = "F600BC2D8F";
-    const PART2_PROVIDED7: &str = "9C005AC2F8F0";
-    const PART2_PROVIDED8: &str = "9C0141080250320F1802104A08";
-
-    #[test]
-    fn part2_provided() {
-        assert_eq!(part2(PART2_PROVIDED1).unwrap(), 3);
-        assert_eq!(part2(PART2_PROVIDED2).unwrap(), 54);
-        assert_eq!(part2(PART2_PROVIDED3).unwrap(), 7);
-        assert_eq!(part2(PART2_PROVIDED4).unwrap(), 9);
-        assert_eq!(part2(PART2_PROVIDED5).unwrap(), 1);
-        assert_eq!(part2(PART2_PROVIDED6).unwrap(), 0);
-        assert_eq!(part2(PART2_PROVIDED7).unwrap(), 0);
-        assert_eq!(part2(PART2_PROVIDED8).unwrap(), 1);
-    }
-
-    #[test]
-    fn part2_real() {
-        assert_eq!(part2(INPUT).unwrap(), 342997120375);
-    }
-}
diff --git a/aoc2021/src/day17.rs b/aoc2021/src/day17.rs
deleted file mode 100644
index 1def61b..0000000
--- a/aoc2021/src/day17.rs
+++ /dev/null
@@ -1,213 +0,0 @@
-//! Improvement ideas:
-//!
-//! X and Y coordinates are independant, so we can compute them separately, and keep track of which
-//! values of X and Y can ever reach the target area, and if so, keep the step numbers where they
-//! match. Some cross referencing can then isolate the valid trajectories.
-//!
-//! This already runs in 1ms though so... maybe later
-use std::cmp::Ordering;
-use std::fmt::Write;
-use std::ops::RangeInclusive;
-
-use anyhow::{Context, Result};
-
-const INPUT: &str = include_str!("../input/day17.txt");
-
-pub fn run() -> Result<String> {
-    let mut res = String::with_capacity(128);
-
-    writeln!(res, "part 1: {}", part1(INPUT)?)?;
-    writeln!(res, "part 2: {}", part2(INPUT)?)?;
-
-    Ok(res)
-}
-
-fn part1(input: &str) -> Result<isize> {
-    let area: TargetArea = input
-        .parse()
-        .context("couldn't parse input to target area")?;
-
-    let min_x_vel = if area.min_x() > 0 {
-        (0..).find(|x| ((x * (x + 1)) / 2) >= area.min_x()).unwrap()
-    } else if area.max_x() < 0 {
-        -(0..)
-            .find(|x| ((x * (x + 1)) / 2) >= area.max_x().abs())
-            .unwrap()
-    } else {
-        0
-    };
-
-    let max_x_vel = if area.min_x() > 0 {
-        area.max_x()
-    } else if area.max_x() < 0 {
-        area.min_x()
-    } else {
-        0
-    };
-
-    // Rust ranges can only be increasing, so swap values around if negative
-    let (min_x_vel, max_x_vel) = (min_x_vel.min(max_x_vel), min_x_vel.max(max_x_vel));
-
-    // we could launch the prob downward, but in that case max Y reached would always be 0
-    let min_y_vel = 1;
-    let max_y_vel = area.min_y().abs();
-
-    (min_x_vel..=max_x_vel)
-        .flat_map(|x_vel| (min_y_vel..=max_y_vel).map(move |y_vel| (x_vel, y_vel)))
-        .filter_map(|(x_vel, y_vel)| throw(x_vel, y_vel, &area))
-        .max()
-        .context("couldn't find any trajectory")
-}
-
-fn part2(input: &str) -> Result<usize> {
-    let area: TargetArea = input
-        .parse()
-        .context("couldn't parse input to target area")?;
-
-    let min_x_vel = if area.min_x() > 0 {
-        (0..).find(|x| ((x * (x + 1)) / 2) >= area.min_x()).unwrap()
-    } else if area.max_x() < 0 {
-        -(0..)
-            .find(|x| ((x * (x + 1)) / 2) >= area.max_x().abs())
-            .unwrap()
-    } else {
-        0
-    };
-
-    let max_x_vel = if area.min_x() > 0 {
-        area.max_x()
-    } else if area.max_x() < 0 {
-        area.min_x()
-    } else {
-        0
-    };
-
-    // Rust ranges can only be increasing, so swap values around if negative
-    let (min_x_vel, max_x_vel) = (min_x_vel.min(max_x_vel), min_x_vel.max(max_x_vel));
-
-    // let's assume that the area is always lower than (0, 0)
-    let min_y_vel = area.min_y();
-    let max_y_vel = area.min_y().abs();
-
-    Ok((min_x_vel..=max_x_vel)
-        .flat_map(|x_vel| (min_y_vel..=max_y_vel).map(move |y_vel| (x_vel, y_vel)))
-        .filter_map(|(x_vel, y_vel)| throw(x_vel, y_vel, &area))
-        .count())
-}
-
-fn throw(mut xvel: isize, mut yvel: isize, area: &TargetArea) -> Option<isize> {
-    let (mut pos_x, mut pos_y) = (0, 0);
-    let mut highest_y = 0;
-
-    loop {
-        if area.contains(pos_x, pos_y) {
-            return Some(highest_y);
-        }
-
-        // Three cases where we can stop here:
-        // - probe is lower than area, and gravity pulls it even lower
-        // - probe is on the left, and x velocity goes left
-        // - probe is on the right, and x velocity goes right
-        if (pos_y < area.min_y() && yvel <= 0)
-            || (xvel <= 0 && pos_x < area.min_x())
-            || (xvel >= 0 && pos_x > area.max_x())
-        {
-            // the probe will never reach the area, we can stop the simulation here
-            return None;
-        }
-
-        // - The probe's x position increases by its x velocity.
-        pos_x += xvel;
-        // - The probe's y position increases by its y velocity.
-        pos_y += yvel;
-        // - Due to drag, the probe's x velocity changes by 1 toward the value 0; that is, it
-        // decreases by 1 if it is greater than 0, increases by 1 if it is less than 0, or does not
-        // change if it is already 0.
-        match xvel.cmp(&0) {
-            Ordering::Less => xvel += 1,
-            Ordering::Greater => xvel -= 1,
-            _ => {}
-        }
-        // - Due to gravity, the probe's y velocity decreases by 1.
-        yvel -= 1;
-
-        // update highest seen y
-        highest_y = highest_y.max(pos_y);
-    }
-}
-
-struct TargetArea {
-    x_range: RangeInclusive<isize>,
-    y_range: RangeInclusive<isize>,
-}
-
-impl TargetArea {
-    fn contains(&self, x: isize, y: isize) -> bool {
-        self.x_range.contains(&x) && self.y_range.contains(&y)
-    }
-
-    fn min_y(&self) -> isize {
-        *self.y_range.start()
-    }
-
-    fn min_x(&self) -> isize {
-        *self.x_range.start()
-    }
-
-    fn max_x(&self) -> isize {
-        *self.x_range.end()
-    }
-}
-
-impl std::str::FromStr for TargetArea {
-    type Err = anyhow::Error;
-
-    fn from_str(s: &str) -> Result<Self> {
-        let s = s
-            .trim()
-            .strip_prefix("target area: ")
-            .context("missing target area while parsing")?;
-
-        let (x, y) = s.split_once(", ").context("couldn't split on comma")?;
-
-        let x = x.strip_prefix("x=").context("couldn't find `x=`")?;
-        let (min_x, max_x) = x.split_once("..").context("couldn't split on `..`")?;
-        let (min_x, max_x) = (min_x.parse()?, max_x.parse()?);
-
-        let y = y.strip_prefix("y=").context("couldn't find `y=`")?;
-        let (min_y, max_y) = y.split_once("..").context("couldn't split on `..`")?;
-        let (min_y, max_y) = (min_y.parse()?, max_y.parse()?);
-
-        Ok(Self {
-            x_range: min_x..=max_x,
-            y_range: min_y..=max_y,
-        })
-    }
-}
-
-#[cfg(test)]
-mod tests {
-    use super::*;
-
-    const PROVIDED: &str = include_str!("../input/day17_provided.txt");
-
-    #[test]
-    fn part1_provided() {
-        assert_eq!(part1(PROVIDED).unwrap(), 45);
-    }
-
-    #[test]
-    fn part1_real() {
-        assert_eq!(part1(INPUT).unwrap(), 4186);
-    }
-
-    #[test]
-    fn part2_provided() {
-        assert_eq!(part2(PROVIDED).unwrap(), 112);
-    }
-
-    #[test]
-    fn part2_real() {
-        assert_eq!(part2(INPUT).unwrap(), 2709);
-    }
-}
diff --git a/aoc2021/src/day21.rs b/aoc2021/src/day21.rs
deleted file mode 100644
index 274439b..0000000
--- a/aoc2021/src/day21.rs
+++ /dev/null
@@ -1,183 +0,0 @@
-use std::collections::HashMap;
-use std::fmt::Write;
-use std::iter;
-use std::ops::RangeInclusive;
-
-use anyhow::{Context, Result};
-
-const INPUT: &str = include_str!("../input/day21.txt");
-
-pub fn run() -> Result<String> {
-    let mut res = String::with_capacity(128);
-
-    writeln!(res, "part 1: {}", part1(INPUT)?)?;
-    writeln!(res, "part 2: {}", part2(INPUT)?)?;
-
-    Ok(res)
-}
-
-fn part1(input: &str) -> Result<usize> {
-    let mut lines = input.lines();
-    let mut player1_pos: PlayerPos = lines
-        .next()
-        .and_then(|line| line.trim().strip_prefix("Player 1 starting position: "))
-        .and_then(|pos| pos.parse().ok())
-        .map(PlayerPos::new)
-        .context("couldn't find player 1 pos")?;
-    let mut player2_pos: PlayerPos = lines
-        .next()
-        .and_then(|line| line.trim().strip_prefix("Player 2 starting position: "))
-        .and_then(|pos| pos.parse().ok())
-        .map(PlayerPos::new)
-        .context("couldn't find player 2 pos")?;
-
-    let mut player1_score = 0;
-    let mut player2_score = 0;
-    let mut dice = DeterministicDice::new();
-
-    while player2_score < 1000 {
-        let mv = dice.next_3_sum();
-
-        player1_pos.advance_by(mv);
-        player1_score += player1_pos.pos();
-
-        std::mem::swap(&mut player1_pos, &mut player2_pos);
-        std::mem::swap(&mut player1_score, &mut player2_score);
-    }
-
-    let loser_score = player1_score;
-
-    Ok(loser_score * dice.rolls())
-}
-
-fn part2(input: &str) -> Result<usize> {
-    let mut lines = input.lines();
-    let player1_pos: PlayerPos = lines
-        .next()
-        .and_then(|line| line.trim().strip_prefix("Player 1 starting position: "))
-        .and_then(|pos| pos.parse().ok())
-        .map(PlayerPos::new)
-        .context("couldn't find player 1 pos")?;
-    let player2_pos: PlayerPos = lines
-        .next()
-        .and_then(|line| line.trim().strip_prefix("Player 2 starting position: "))
-        .and_then(|pos| pos.parse().ok())
-        .map(PlayerPos::new)
-        .context("couldn't find player 2 pos")?;
-
-    let (player1_score, player2_score) =
-        quantum_dice_game(player1_pos, player2_pos, 0, 0, &mut HashMap::new());
-
-    Ok(player1_score.max(player2_score))
-}
-
-type Cache = HashMap<(PlayerPos, PlayerPos, usize, usize), (usize, usize)>;
-
-fn quantum_dice_game(
-    pos1: PlayerPos,
-    pos2: PlayerPos,
-    score1: usize,
-    score2: usize,
-    cache: &mut Cache,
-) -> (usize, usize) {
-    // We swap players on each recursive call, so player 2 is the previous player 1. Player 1 is the
-    // only one who played, so we only need to check his score.
-    if score2 >= 21 {
-        return (0, 1);
-    }
-
-    // Memoization
-    if let Some(wins) = cache.get(&(pos1, pos2, score1, score2)) {
-        return *wins;
-    }
-
-    let (mut wins1, mut wins2) = (0, 0);
-    // 3 = 1 + 1 + 1
-    // 4 = 1 + 1 + 2, 1 + 2 + 1, 2 + 1 + 1
-    // ...
-    // 9 = 3 + 3 + 3
-    for (mv, times) in [(3, 1), (4, 3), (5, 6), (6, 7), (7, 6), (8, 3), (9, 1)] {
-        let mut pos1 = pos1; // copy
-        pos1.advance_by(mv);
-
-        // We swap out player 1 and 2 for the next recursion
-        let (w2, w1) = quantum_dice_game(pos2, pos1, score2, score1 + pos1.pos(), cache);
-
-        wins1 += w1 * times;
-        wins2 += w2 * times;
-    }
-
-    cache.insert((pos1, pos2, score1, score2), (wins1, wins2));
-    (wins1, wins2)
-}
-
-#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)]
-struct PlayerPos(usize);
-
-impl PlayerPos {
-    fn new(pos: usize) -> Self {
-        debug_assert!((1..=10).contains(&pos));
-
-        // represented from 0 to 9 for modulo ease of use
-        Self(pos - 1)
-    }
-
-    fn advance_by(&mut self, mv: usize) {
-        self.0 = (self.0 + mv) % 10
-    }
-
-    fn pos(&self) -> usize {
-        self.0 + 1
-    }
-}
-
-struct DeterministicDice {
-    iter: iter::Cycle<RangeInclusive<usize>>,
-    rolls: usize,
-}
-
-impl DeterministicDice {
-    fn new() -> Self {
-        Self {
-            iter: (1..=100).cycle(),
-            rolls: 0,
-        }
-    }
-
-    fn next_3_sum(&mut self) -> usize {
-        self.rolls += 3;
-
-        self.iter.next().unwrap() + self.iter.next().unwrap() + self.iter.next().unwrap()
-    }
-
-    fn rolls(&self) -> usize {
-        self.rolls
-    }
-}
-
-#[cfg(test)]
-mod tests {
-    use super::*;
-
-    const PROVIDED: &str = include_str!("../input/day21_provided.txt");
-
-    #[test]
-    fn part1_provided() {
-        assert_eq!(part1(PROVIDED).unwrap(), 739785);
-    }
-
-    #[test]
-    fn part1_real() {
-        assert_eq!(part1(INPUT).unwrap(), 908595);
-    }
-
-    #[test]
-    fn part2_provided() {
-        assert_eq!(part2(PROVIDED).unwrap(), 444356092776315);
-    }
-
-    #[test]
-    fn part2_real() {
-        assert_eq!(part2(INPUT).unwrap(), 91559198282731);
-    }
-}
diff --git a/aoc2021/src/lib.rs b/aoc2021/src/lib.rs
deleted file mode 100644
index 7e99714..0000000
--- a/aoc2021/src/lib.rs
+++ /dev/null
@@ -1,21 +0,0 @@
-#![warn(clippy::explicit_iter_loop, clippy::redundant_closure_for_method_calls)]
-
-pub mod day01;
-pub mod day02;
-pub mod day03;
-pub mod day04;
-pub mod day05;
-pub mod day06;
-pub mod day07;
-pub mod day08;
-pub mod day09;
-pub mod day10;
-pub mod day11;
-pub mod day12;
-pub mod day13;
-pub mod day14;
-pub mod day15;
-pub mod day16;
-pub mod day17;
-
-pub mod day21;
diff --git a/aoc2021/src/main.rs b/aoc2021/src/main.rs
deleted file mode 100644
index 6ba207f..0000000
--- a/aoc2021/src/main.rs
+++ /dev/null
@@ -1,48 +0,0 @@
-use anyhow::Result;
-
-use aoc::DayFunc;
-
-use aoc2021::day01;
-use aoc2021::day02;
-use aoc2021::day03;
-use aoc2021::day04;
-use aoc2021::day05;
-use aoc2021::day06;
-use aoc2021::day07;
-use aoc2021::day08;
-use aoc2021::day09;
-use aoc2021::day10;
-use aoc2021::day11;
-use aoc2021::day12;
-use aoc2021::day13;
-use aoc2021::day14;
-use aoc2021::day15;
-use aoc2021::day16;
-use aoc2021::day17;
-
-use aoc2021::day21;
-
-fn main() -> Result<()> {
-    let days: &[DayFunc] = &[
-        day01::run,
-        day02::run,
-        day03::run,
-        day04::run,
-        day05::run,
-        day06::run,
-        day07::run,
-        day08::run,
-        day09::run,
-        day10::run,
-        day11::run,
-        day12::run,
-        day13::run,
-        day14::run,
-        day15::run,
-        day16::run,
-        day17::run,
-        day21::run,
-    ];
-
-    aoc::run(days)
-}
diff --git a/aoc2022/Cargo.toml b/aoc2022/Cargo.toml
deleted file mode 100644
index 1f0e257..0000000
--- a/aoc2022/Cargo.toml
+++ /dev/null
@@ -1,25 +0,0 @@
-[package]
-name = "aoc2022"
-version = "0.1.0"
-authors = ["Antoine Martin <antoine@alarsyo.net>"]
-edition = "2021"
-
-# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
-
-[dependencies]
-aoc = { path = "../aoc" }
-anyhow = "1.0"
-
-[dev-dependencies]
-criterion = { version = "0.4", default-features = false, features = [ "rayon" ] }
-
-[lib]
-path = "src/lib.rs"
-
-[[bin]]
-name = "aoc2022"
-path = "src/main.rs"
-
-[[bench]]
-name = "aoc2022_bench"
-harness = false
diff --git a/aoc2022/benches/aoc2022_bench.rs b/aoc2022/benches/aoc2022_bench.rs
deleted file mode 100644
index 9daac04..0000000
--- a/aoc2022/benches/aoc2022_bench.rs
+++ /dev/null
@@ -1,18 +0,0 @@
-use criterion::{criterion_group, criterion_main, Criterion};
-
-use aoc2022::day01;
-use aoc2022::day02;
-use aoc2022::day03;
-
-fn aoc2022_all(c: &mut Criterion) {
-    c.bench_function("day01", |b| b.iter(|| day01::run().unwrap()));
-    c.bench_function("day02", |b| b.iter(|| day02::run().unwrap()));
-    c.bench_function("day03", |b| b.iter(|| day03::run().unwrap()));
-}
-
-criterion_group! {
-    name = all_days;
-    config = Criterion::default().sample_size(200);
-    targets = aoc2022_all
-}
-criterion_main!(all_days);
diff --git a/aoc2022/input/day01.txt b/aoc2022/input/day01.txt
deleted file mode 100644
index e1e0531..0000000
--- a/aoc2022/input/day01.txt
+++ /dev/null
@@ -1,2253 +0,0 @@
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diff --git a/aoc2022/input/day01_provided.txt b/aoc2022/input/day01_provided.txt
deleted file mode 100644
index 2094f91..0000000
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diff --git a/aoc2022/input/day02.txt b/aoc2022/input/day02.txt
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diff --git a/aoc2022/input/day02_provided.txt b/aoc2022/input/day02_provided.txt
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index db60e36..0000000
--- a/aoc2022/input/day02_provided.txt
+++ /dev/null
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diff --git a/aoc2022/input/day03.txt b/aoc2022/input/day03.txt
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-BRRRWQWbSRGGRTTtZHWSqTrvDfgfdfrrwrDgfbvfzfrd
-jRBhWRWTSRttQBZMNchNCsmFMchP
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-PZsQmfPphvPjSsjmPjfZllBwcNRDNcDqNNWbTclS
-fjqZBSDSDwwsQwCDND
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-gptBBdgzpsBbpQvvPQPRqrdcCC
diff --git a/aoc2022/input/day03_provided.txt b/aoc2022/input/day03_provided.txt
deleted file mode 100644
index f17e726..0000000
--- a/aoc2022/input/day03_provided.txt
+++ /dev/null
@@ -1,6 +0,0 @@
-vJrwpWtwJgWrhcsFMMfFFhFp
-jqHRNqRjqzjGDLGLrsFMfFZSrLrFZsSL
-PmmdzqPrVvPwwTWBwg
-wMqvLMZHhHMvwLHjbvcjnnSBnvTQFn
-ttgJtRGJQctTZtZT
-CrZsJsPPZsGzwwsLwLmpwMDw
diff --git a/aoc2022/src/day01.rs b/aoc2022/src/day01.rs
deleted file mode 100644
index 230ce57..0000000
--- a/aoc2022/src/day01.rs
+++ /dev/null
@@ -1,85 +0,0 @@
-use std::collections::BinaryHeap;
-use std::fmt::Write;
-
-use anyhow::{Context, Result};
-
-const INPUT: &str = include_str!("../input/day01.txt");
-
-pub fn run() -> Result<String> {
-    let mut res = String::with_capacity(128);
-
-    writeln!(res, "part 1: {}", part1(INPUT)?)?;
-    writeln!(res, "part 2: {}", part2(INPUT)?)?;
-
-    Ok(res)
-}
-
-fn part1(input: &str) -> Result<u64> {
-    let inventories = input
-        .split("\n\n")
-        .map(str::parse::<Inventory>)
-        .collect::<Result<Vec<_>>>()?;
-
-    inventories
-        .iter()
-        .map(Inventory::total_calories)
-        .max()
-        .context("inventory list was empty")
-}
-
-fn part2(input: &str) -> Result<u64> {
-    let inventories = input
-        .split("\n\n")
-        .map(|line| line.parse::<Inventory>().map(|inv| inv.total_calories()))
-        .collect::<Result<BinaryHeap<_>>>()?;
-
-    Ok(inventories.iter().take(3).sum())
-}
-
-#[derive(Debug)]
-struct Inventory(Vec<u64>);
-
-impl std::str::FromStr for Inventory {
-    type Err = anyhow::Error;
-
-    fn from_str(s: &str) -> Result<Self, Self::Err> {
-        Ok(Inventory(
-            s.lines()
-                .map(|line| line.parse::<u64>().map_err(anyhow::Error::new))
-                .collect::<Result<Vec<_>>>()?,
-        ))
-    }
-}
-
-impl Inventory {
-    fn total_calories(&self) -> u64 {
-        self.0.iter().sum()
-    }
-}
-
-#[cfg(test)]
-mod tests {
-    use super::*;
-
-    const PROVIDED: &str = include_str!("../input/day01_provided.txt");
-
-    #[test]
-    fn part1_provided() {
-        assert_eq!(part1(PROVIDED).unwrap(), 24000);
-    }
-
-    #[test]
-    fn part1_real() {
-        assert_eq!(part1(INPUT).unwrap(), 68923);
-    }
-
-    #[test]
-    fn part2_provided() {
-        assert_eq!(part2(PROVIDED).unwrap(), 45000);
-    }
-
-    #[test]
-    fn part2_real() {
-        assert_eq!(part2(INPUT).unwrap(), 200044);
-    }
-}
diff --git a/aoc2022/src/day02.rs b/aoc2022/src/day02.rs
deleted file mode 100644
index 97a24e5..0000000
--- a/aoc2022/src/day02.rs
+++ /dev/null
@@ -1,202 +0,0 @@
-use std::fmt::Write;
-
-use anyhow::{bail, Context, Result};
-
-const INPUT: &str = include_str!("../input/day02.txt");
-
-pub fn run() -> Result<String> {
-    let mut res = String::with_capacity(128);
-
-    writeln!(res, "part 1: {}", part1(INPUT)?)?;
-    writeln!(res, "part 2: {}", part2(INPUT)?)?;
-
-    Ok(res)
-}
-
-fn part1(input: &str) -> Result<u64> {
-    let mut score = 0;
-    for line in input.lines() {
-        let round: RoundPart1 = line.parse()?;
-        score += round.score();
-    }
-
-    Ok(score)
-}
-
-fn part2(input: &str) -> Result<u64> {
-    let mut score = 0;
-    for line in input.lines() {
-        let round: RoundPart2 = line.parse()?;
-        score += round.score();
-    }
-
-    Ok(score)
-}
-
-#[derive(Debug)]
-enum Shape {
-    Rock,
-    Paper,
-    Scissors,
-}
-
-impl std::str::FromStr for Shape {
-    type Err = anyhow::Error;
-
-    fn from_str(s: &str) -> Result<Self, Self::Err> {
-        match s {
-            "A" | "X" => Ok(Self::Rock),
-            "B" | "Y" => Ok(Self::Paper),
-            "C" | "Z" => Ok(Self::Scissors),
-            _ => bail!("unsupported shape encoding: {}", s),
-        }
-    }
-}
-
-impl Shape {
-    fn score(&self) -> u64 {
-        match self {
-            Self::Rock => 1,
-            Self::Paper => 2,
-            Self::Scissors => 3,
-        }
-    }
-}
-
-struct RoundPart1 {
-    opponent_move: Shape,
-    my_move: Shape,
-}
-
-impl std::str::FromStr for RoundPart1 {
-    type Err = anyhow::Error;
-
-    fn from_str(s: &str) -> Result<Self, Self::Err> {
-        let (opponent_move, my_move) =
-            s.split_once(' ').context("couldn't split round on space")?;
-        let opponent_move = opponent_move.parse()?;
-        let my_move = my_move.parse()?;
-
-        Ok(Self {
-            opponent_move,
-            my_move,
-        })
-    }
-}
-
-impl RoundPart1 {
-    fn outcome(&self) -> Outcome {
-        match (&self.opponent_move, &self.my_move) {
-            (Shape::Rock, Shape::Rock) => Outcome::Draw,
-            (Shape::Rock, Shape::Paper) => Outcome::Won,
-            (Shape::Rock, Shape::Scissors) => Outcome::Lost,
-            (Shape::Paper, Shape::Rock) => Outcome::Lost,
-            (Shape::Paper, Shape::Paper) => Outcome::Draw,
-            (Shape::Paper, Shape::Scissors) => Outcome::Won,
-            (Shape::Scissors, Shape::Rock) => Outcome::Won,
-            (Shape::Scissors, Shape::Paper) => Outcome::Lost,
-            (Shape::Scissors, Shape::Scissors) => Outcome::Draw,
-        }
-    }
-
-    fn score(&self) -> u64 {
-        self.outcome().score() + self.my_move.score()
-    }
-}
-
-struct RoundPart2 {
-    opponent_move: Shape,
-    outcome: Outcome,
-}
-
-impl std::str::FromStr for RoundPart2 {
-    type Err = anyhow::Error;
-
-    fn from_str(s: &str) -> Result<Self, Self::Err> {
-        let (opponent_move, outcome) =
-            s.split_once(' ').context("couldn't split round on space")?;
-        let opponent_move = opponent_move.parse()?;
-        let outcome = outcome.parse()?;
-
-        Ok(Self {
-            opponent_move,
-            outcome,
-        })
-    }
-}
-
-impl RoundPart2 {
-    fn shape_to_play(&self) -> Shape {
-        match (&self.opponent_move, &self.outcome) {
-            (Shape::Rock, Outcome::Lost) => Shape::Scissors,
-            (Shape::Rock, Outcome::Draw) => Shape::Rock,
-            (Shape::Rock, Outcome::Won) => Shape::Paper,
-            (Shape::Paper, Outcome::Lost) => Shape::Rock,
-            (Shape::Paper, Outcome::Draw) => Shape::Paper,
-            (Shape::Paper, Outcome::Won) => Shape::Scissors,
-            (Shape::Scissors, Outcome::Lost) => Shape::Paper,
-            (Shape::Scissors, Outcome::Draw) => Shape::Scissors,
-            (Shape::Scissors, Outcome::Won) => Shape::Rock,
-        }
-    }
-
-    fn score(&self) -> u64 {
-        self.outcome.score() + self.shape_to_play().score()
-    }
-}
-
-enum Outcome {
-    Lost,
-    Draw,
-    Won,
-}
-
-impl std::str::FromStr for Outcome {
-    type Err = anyhow::Error;
-
-    fn from_str(s: &str) -> Result<Self, Self::Err> {
-        match s {
-            "X" => Ok(Self::Lost),
-            "Y" => Ok(Self::Draw),
-            "Z" => Ok(Self::Won),
-            _ => bail!("unsupported outcome encoding: {}", s),
-        }
-    }
-}
-
-impl Outcome {
-    fn score(&self) -> u64 {
-        match self {
-            Self::Lost => 0,
-            Self::Draw => 3,
-            Self::Won => 6,
-        }
-    }
-}
-
-#[cfg(test)]
-mod tests {
-    use super::*;
-
-    const PROVIDED: &str = include_str!("../input/day02_provided.txt");
-
-    #[test]
-    fn part1_provided() {
-        assert_eq!(part1(PROVIDED).unwrap(), 15);
-    }
-
-    #[test]
-    fn part1_real() {
-        assert_eq!(part1(INPUT).unwrap(), 11150);
-    }
-
-    #[test]
-    fn part2_provided() {
-        assert_eq!(part2(PROVIDED).unwrap(), 12);
-    }
-
-    #[test]
-    fn part2_real() {
-        assert_eq!(part2(INPUT).unwrap(), 8295);
-    }
-}
diff --git a/aoc2022/src/day03.rs b/aoc2022/src/day03.rs
deleted file mode 100644
index a58b5dd..0000000
--- a/aoc2022/src/day03.rs
+++ /dev/null
@@ -1,164 +0,0 @@
-use std::{collections::BTreeSet, fmt::Write, str::FromStr};
-
-use anyhow::{bail, Context, Result};
-
-const INPUT: &str = include_str!("../input/day03.txt");
-
-pub fn run() -> Result<String> {
-    let mut res = String::with_capacity(128);
-
-    writeln!(res, "part 1: {}", part1(INPUT)?)?;
-    writeln!(res, "part 2: {}", part2(INPUT)?)?;
-
-    Ok(res)
-}
-
-fn part1(input: &str) -> Result<u64> {
-    let mut priorities = 0;
-    for line in input.lines() {
-        let rucksack = RucksackSplit::from_str(line)?;
-        let item = rucksack
-            .find_duplicate()
-            .context("rucksack didn't have any duplicate!")?;
-        priorities += item.priority();
-    }
-
-    Ok(priorities)
-}
-
-fn part2(input: &str) -> Result<u64> {
-    let mut priorities = 0;
-    let mut lines = input.lines();
-    while let (Some(first), Some(second), Some(third)) = (lines.next(), lines.next(), lines.next())
-    {
-        let first = Rucksack::from_str(first)?;
-        let second = Rucksack::from_str(second)?;
-        let third = Rucksack::from_str(third)?;
-
-        let priority = first
-            .items
-            .intersection(&second.items)
-            .copied()
-            .collect::<BTreeSet<_>>()
-            .intersection(&third.items)
-            .next()
-            .context("the three elves didn't have any item in common!")?
-            .priority();
-
-        priorities += priority;
-    }
-
-    Ok(priorities)
-}
-
-#[derive(Debug, PartialEq, Eq, PartialOrd, Ord, Clone, Copy)]
-struct Item(u8);
-
-impl TryFrom<u8> for Item {
-    type Error = anyhow::Error;
-
-    fn try_from(value: u8) -> Result<Self, Self::Error> {
-        match value {
-            b'A'..=b'Z' | b'a'..=b'z' => Ok(Self(value)),
-            _ => bail!("unsupported item kind: `{}'", value),
-        }
-    }
-}
-
-impl Item {
-    fn priority(self) -> u64 {
-        match self.0 {
-            b'A'..=b'Z' => (self.0 - b'A' + 27).into(),
-            b'a'..=b'z' => (self.0 - b'a' + 1).into(),
-            _ => unreachable!("shouldn't happen if Item is constructed from TryFrom"),
-        }
-    }
-}
-
-struct RucksackSplit {
-    first_half: BTreeSet<Item>,
-    second_half: BTreeSet<Item>,
-}
-
-impl std::str::FromStr for RucksackSplit {
-    type Err = anyhow::Error;
-
-    fn from_str(s: &str) -> Result<Self, Self::Err> {
-        if !s.len().is_multiple_of(2) {
-            bail!(
-                "rucksack should contain an even number of items, this one contained {}",
-                s.len()
-            );
-        }
-
-        let half = s.len() / 2;
-        let mut bytes = s.bytes();
-        let first_half = (&mut bytes)
-            .take(half)
-            .map(Item::try_from)
-            .collect::<Result<_>>()?;
-
-        let second_half = (&mut bytes)
-            .take(half)
-            .map(Item::try_from)
-            .collect::<Result<_>>()?;
-
-        debug_assert!(bytes.count() == 0, "something went terribly wrong!");
-
-        Ok(Self {
-            first_half,
-            second_half,
-        })
-    }
-}
-
-impl RucksackSplit {
-    fn find_duplicate(&self) -> Option<Item> {
-        self.first_half
-            .intersection(&self.second_half)
-            .next()
-            .copied()
-    }
-}
-
-struct Rucksack {
-    items: BTreeSet<Item>,
-}
-
-impl std::str::FromStr for Rucksack {
-    type Err = anyhow::Error;
-
-    fn from_str(s: &str) -> Result<Self, Self::Err> {
-        let mut bytes = s.bytes();
-        let items = (&mut bytes).map(Item::try_from).collect::<Result<_>>()?;
-
-        Ok(Self { items })
-    }
-}
-
-#[cfg(test)]
-mod tests {
-    use super::*;
-
-    const PROVIDED: &str = include_str!("../input/day03_provided.txt");
-
-    #[test]
-    fn part1_provided() {
-        assert_eq!(part1(PROVIDED).unwrap(), 157);
-    }
-
-    #[test]
-    fn part1_real() {
-        assert_eq!(part1(INPUT).unwrap(), 8018);
-    }
-
-    #[test]
-    fn part2_provided() {
-        assert_eq!(part2(PROVIDED).unwrap(), 70);
-    }
-
-    #[test]
-    fn part2_real() {
-        assert_eq!(part2(INPUT).unwrap(), 2518);
-    }
-}
diff --git a/aoc2022/src/lib.rs b/aoc2022/src/lib.rs
deleted file mode 100644
index eef213c..0000000
--- a/aoc2022/src/lib.rs
+++ /dev/null
@@ -1,5 +0,0 @@
-#![warn(clippy::explicit_iter_loop, clippy::redundant_closure_for_method_calls)]
-
-pub mod day01;
-pub mod day02;
-pub mod day03;
diff --git a/aoc2022/src/main.rs b/aoc2022/src/main.rs
deleted file mode 100644
index fefc61d..0000000
--- a/aoc2022/src/main.rs
+++ /dev/null
@@ -1,13 +0,0 @@
-use anyhow::Result;
-
-use aoc::DayFunc;
-
-use aoc2022::day01;
-use aoc2022::day02;
-use aoc2022::day03;
-
-fn main() -> Result<()> {
-    let days: &[DayFunc] = &[day01::run, day02::run, day03::run];
-
-    aoc::run(days)
-}
diff --git a/aoc2023/Cargo.toml b/aoc2023/Cargo.toml
deleted file mode 100644
index 30be3b6..0000000
--- a/aoc2023/Cargo.toml
+++ /dev/null
@@ -1,21 +0,0 @@
-[package]
-name = "aoc2023"
-version = "0.1.0"
-authors = ["Antoine Martin <antoine@alarsyo.net>"]
-edition = "2021"
-
-# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
-
-[dependencies]
-aoc = { path = "../aoc" }
-anyhow = "1.0"
-
-[dev-dependencies]
-criterion = { version = "0.4", default-features = false, features = [ "rayon" ] }
-
-[lib]
-path = "src/lib.rs"
-
-[[bin]]
-name = "aoc2023"
-path = "src/main.rs"
diff --git a/aoc2023/input/day01.txt b/aoc2023/input/day01.txt
deleted file mode 100644
index 25b1572..0000000
--- a/aoc2023/input/day01.txt
+++ /dev/null
@@ -1,1000 +0,0 @@
-zlmlk1
-vqjvxtc79mvdnktdsxcqc1sevenone
-vsskdclbtmjmvrseven6
-8jkfncbeight7seven8
-six8dbfrsxp
-2zpcbjdxcjfone68six
-zqmzgfivethreefdnlhpeight8798
-fivenineone6
-6sixzvdsprdqlftwonine
-lqztrmztwo8dg
-four6onerv2pfhm
-plvzrs5
-5282gdnc918
-pskjsrchjpxoneonenine96fivefour
-fivefour2hhtprpjndm4
-6qbdcfdjsd1lmldklflteight
-gctgdhpkkjninekj65rkqg8
-eight6gcjlsmzt5
-5chvmhmfgl7xkjfdpdbp
-5tpzpnrgpftrnine
-threeonehqbzktq1
-685fivetwofour4lvgxgdb
-9jdxljkfqttstqxdzdsztsxrfjbkqmmsqzseven
-twostcllbpndtwo15seven
-8fivetwofivetjfvsxzs5kdkpxgxvsfhr7
-sevenlvrc2fivefivesixqkzdkrfour
-45jjpmnscmmk
-lhxgbfjtcknpvz6
-tndgnkcqtjbrzgbrfjr3fiveqxlktntzthree
-vqb6threeeightbdt
-1eighteight7fourone8
-bcmqn9onecnrzhsrsgzggzhtskjeightbz6khfhccktwonenrj
-6qmgkbkmlxfourprhxrxrdseight
-9three479
-9two6zhtjzfmjrteight
-1fiverrxdmvfvxhs7jqzzqpcflzt75
-pnjmlpbbeightskgdf6one
-6cpzqzfsjtpfq135
-484
-llfvhxglfivesixthreenseven36
-jhcpt9rq7fhzbnhk
-tthree5lrgtbxxvonezfmdpseven2
-67jmrxfdmfbmzsixkzghng
-sixthreefdbzhslqone2sevenfoursevennlnpjgsx
-54zrkfbfq
-six7rfpfbzbghxcnxlnfjkznine7
-8dfoursm338cz
-sevenfiveeightone68
-dqmvcbdclx23653
-eight58qgjlcvflrggndskff
-shmmk28
-93eightdtgcnhphv1
-gdtdjgggtj3dgrqsmvfh
-one3pksbh32three
-9kkpjrmhmmlzvqngnhftwoonexjqmnfive
-rlsevenblrvrk7
-nine9hqmtshkjdhs
-93fdbrbnnvxsktggqnjfjk7brsncmxkcfzhm34
-248twofbkfpxtheightwovng
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diff --git a/aoc2023/input/day01_provided.txt b/aoc2023/input/day01_provided.txt
deleted file mode 100644
index 7bbc69a..0000000
--- a/aoc2023/input/day01_provided.txt
+++ /dev/null
@@ -1,4 +0,0 @@
-1abc2
-pqr3stu8vwx
-a1b2c3d4e5f
-treb7uchet
diff --git a/aoc2023/src/day01.rs b/aoc2023/src/day01.rs
deleted file mode 100644
index 4e0fb86..0000000
--- a/aoc2023/src/day01.rs
+++ /dev/null
@@ -1,50 +0,0 @@
-use std::fmt::Write;
-
-use anyhow::Result;
-
-const INPUT: &str = include_str!("../input/day01.txt");
-
-pub fn run() -> Result<String> {
-    let mut res = String::with_capacity(128);
-
-    writeln!(res, "part 1: {}", part1(INPUT)?)?;
-    writeln!(res, "part 2: {}", part2(INPUT)?)?;
-
-    Ok(res)
-}
-
-fn part1(input: &str) -> Result<u64> {
-    let digit_list = input
-        .lines()
-        .map(|s| s.chars().filter(char::is_ascii_digit).collect::<String>());
-
-    Ok(digit_list
-        .map(|digits| {
-            let first = digits.chars().next().unwrap().to_digit(10).unwrap() as u64;
-            let last = digits.chars().last().unwrap().to_digit(10).unwrap() as u64;
-
-            first * 10 + last
-        })
-        .sum())
-}
-
-fn part2(_input: &str) -> Result<u64> {
-    todo!()
-}
-
-#[cfg(test)]
-mod tests {
-    use super::*;
-
-    const PROVIDED: &str = include_str!("../input/day01_provided.txt");
-
-    #[test]
-    fn part1_provided() {
-        assert_eq!(part1(PROVIDED).unwrap(), 142);
-    }
-
-    #[test]
-    fn part1_real() {
-        assert_eq!(part1(INPUT).unwrap(), 54697);
-    }
-}
diff --git a/aoc2023/src/lib.rs b/aoc2023/src/lib.rs
deleted file mode 100644
index 12b8f18..0000000
--- a/aoc2023/src/lib.rs
+++ /dev/null
@@ -1 +0,0 @@
-pub mod day01;
diff --git a/aoc2023/src/main.rs b/aoc2023/src/main.rs
deleted file mode 100644
index 44ee634..0000000
--- a/aoc2023/src/main.rs
+++ /dev/null
@@ -1,11 +0,0 @@
-use anyhow::Result;
-
-use aoc::DayFunc;
-
-use aoc2023::day01;
-
-fn main() -> Result<()> {
-    let days: &[DayFunc] = &[day01::run];
-
-    aoc::run(days)
-}
diff --git a/aoc2025/Cargo.toml b/aoc2025/Cargo.toml
deleted file mode 100644
index a5d2468..0000000
--- a/aoc2025/Cargo.toml
+++ /dev/null
@@ -1,23 +0,0 @@
-[package]
-name = "aoc2025"
-version = "0.1.0"
-authors = ["Antoine Martin <antoine@alarsyo.net>"]
-edition = "2024"
-
-[dependencies]
-aoc = { path = "../aoc" }
-anyhow = "1.0"
-
-[dev-dependencies]
-criterion = { version = "0.8" }
-
-[lib]
-path = "src/lib.rs"
-
-[[bin]]
-name = "aoc2025"
-path = "src/main.rs"
-
-[[bench]]
-name = "aoc2025_bench"
-harness = false
diff --git a/aoc2025/benches/aoc2025_bench.rs b/aoc2025/benches/aoc2025_bench.rs
deleted file mode 100644
index 54497a0..0000000
--- a/aoc2025/benches/aoc2025_bench.rs
+++ /dev/null
@@ -1,30 +0,0 @@
-use criterion::{Criterion, criterion_group, criterion_main};
-
-use aoc2025::day01;
-use aoc2025::day02;
-use aoc2025::day03;
-use aoc2025::day04;
-use aoc2025::day05;
-use aoc2025::day06;
-use aoc2025::day07;
-use aoc2025::day08;
-use aoc2025::day09;
-
-fn aoc2025_all(c: &mut Criterion) {
-    c.bench_function("day01", |b| b.iter(|| day01::run().unwrap()));
-    c.bench_function("day02", |b| b.iter(|| day02::run().unwrap()));
-    c.bench_function("day03", |b| b.iter(|| day03::run().unwrap()));
-    c.bench_function("day04", |b| b.iter(|| day04::run().unwrap()));
-    c.bench_function("day05", |b| b.iter(|| day05::run().unwrap()));
-    c.bench_function("day06", |b| b.iter(|| day06::run().unwrap()));
-    c.bench_function("day07", |b| b.iter(|| day07::run().unwrap()));
-    c.bench_function("day08", |b| b.iter(|| day08::run().unwrap()));
-    c.bench_function("day09", |b| b.iter(|| day09::run().unwrap()));
-}
-
-criterion_group! {
-    name = all_days;
-    config = Criterion::default().sample_size(200);
-    targets = aoc2025_all
-}
-criterion_main!(all_days);
diff --git a/aoc2025/input/day01.txt b/aoc2025/input/day01.txt
deleted file mode 100644
index 95c8342..0000000
--- a/aoc2025/input/day01.txt
+++ /dev/null
@@ -1,4392 +0,0 @@
-L32
-L15
-R38
-R47
-L40
-L9
-R27
-L7
-R27
-R37
-L26
-R49
-R29
-L24
-L42
-R29
-R2
-R47
-R19
-L46
-R1
-L30
-R34
-L16
-R41
-L32
-R46
-L17
-R34
-R9
-L22
-L42
-R22
-L15
-L15
-L42
-R42
-L6
-R42
-R34
-R13
-L2
-L9
-L45
-R3
-R30
-L5
-R11
-R18
-L42
-R68
-L94
-R7
-L15
-R34
-L26
-R23
-L97
-L18
-R61
-L96
-R88
-L16
-L19
-L7
-L93
-R50
-R67
-L17
-L38
-L62
-R91
-L14
-R89
-R15
-R42
-L46
-L93
-R16
-R24
-R76
-R50
-R30
-R20
-L57
-L43
-L97
-L1
-L54
-R52
-L95
-R95
-L94
-L24
-L64
-R60
-R68
-R32
-L50
-R58
-R6
-L92
-L121
-R33
-R288
-L20
-L4
-L1
-R25
-R86
-R49
-R65
-L48
-R948
-L48
-L1
-R77
-R42
-L70
-L98
-L7
-L30
-L758
-R293
-R94
-L510
-R14
-R5
-R14
-R37
-L55
-R185
-R16
-R870
-L40
-L18
-L152
-R10
-R914
-L84
-L51
-L447
-L2
-R57
-R43
-L448
-L80
-R83
-R45
-L94
-L10
-R88
-R57
-L31
-L10
-L187
-L86
-R73
-R54
-R32
-L8
-R117
-L4
-R9
-L56
-R56
-L13
-L265
-L22
-L335
-R35
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-L60
-L70
-R28
-L428
-L516
-L4
-R462
-R675
-R6
-L22
-L58
-L43
-R60
-L60
-L11
-R94
-R66
-L49
-L73
-L83
-L7
-L95
-L84
-L64
-R28
-R33
-R45
-L17
-R94
-L887
-L390
-L81
-L38
-L95
-L13
-R38
-L11
-L917
-R17
-R61
-R47
-L659
-L50
-R59
-R80
-R44
-L35
-L47
-L191
-L79
-L30
-R79
-L79
-R88
-R97
-R27
-R6
-R37
-L8
-R139
-L552
-L71
-R48
-R19
-L246
-L95
-L56
-R397
-L14
-L93
-R80
-R86
-R11
-R585
-L85
-L91
-L909
-R92
-R8
-L82
-L50
-R45
-L24
-L51
-R59
-L15
-L82
-R58
-L31
-L27
-L727
-R55
-L24
-R47
-L74
-L98
-R29
-R92
-R17
-R83
-L29
-L35
-R52
-R312
-R54
-L20
-R27
-R60
-L91
-L96
-R95
-L29
-R47
-L14
-R64
-L52
-L445
-L23
-L84
-L93
-R63
-R89
-L52
-L78
-R78
-L37
-L11
-L111
-L40
-L901
-R26
-R50
-L676
-L57
-R343
-L5
-L81
-R491
-L12
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diff --git a/aoc2025/input/day01_provided.txt b/aoc2025/input/day01_provided.txt
deleted file mode 100644
index 53287c7..0000000
--- a/aoc2025/input/day01_provided.txt
+++ /dev/null
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diff --git a/aoc2025/input/day02.txt b/aoc2025/input/day02.txt
deleted file mode 100644
index 2bc9ca3..0000000
--- a/aoc2025/input/day02.txt
+++ /dev/null
@@ -1 +0,0 @@
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diff --git a/aoc2025/input/day02_provided.txt b/aoc2025/input/day02_provided.txt
deleted file mode 100644
index a3f22ef..0000000
--- a/aoc2025/input/day02_provided.txt
+++ /dev/null
@@ -1 +0,0 @@
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diff --git a/aoc2025/input/day03.txt b/aoc2025/input/day03.txt
deleted file mode 100644
index 611b5dc..0000000
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diff --git a/aoc2025/input/day03_provided.txt b/aoc2025/input/day03_provided.txt
deleted file mode 100644
index 7255fca..0000000
--- a/aoc2025/input/day03_provided.txt
+++ /dev/null
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diff --git a/aoc2025/input/day04.txt b/aoc2025/input/day04.txt
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diff --git a/aoc2025/input/day04_provided.txt b/aoc2025/input/day04_provided.txt
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diff --git a/aoc2025/input/day05.txt b/aoc2025/input/day05.txt
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diff --git a/aoc2025/input/day05_provided.txt b/aoc2025/input/day05_provided.txt
deleted file mode 100644
index 2e9078d..0000000
--- a/aoc2025/input/day05_provided.txt
+++ /dev/null
@@ -1,11 +0,0 @@
-3-5
-10-14
-16-20
-12-18
-
-1
-5
-8
-11
-17
-32
diff --git a/aoc2025/input/day06.txt b/aoc2025/input/day06.txt
deleted file mode 100644
index 00468a3..0000000
--- a/aoc2025/input/day06.txt
+++ /dev/null
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diff --git a/aoc2025/input/day06_provided.txt b/aoc2025/input/day06_provided.txt
deleted file mode 100644
index 337b837..0000000
--- a/aoc2025/input/day06_provided.txt
+++ /dev/null
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diff --git a/aoc2025/input/day07.txt b/aoc2025/input/day07.txt
deleted file mode 100644
index 95f51c6..0000000
--- a/aoc2025/input/day07.txt
+++ /dev/null
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diff --git a/aoc2025/input/day07_provided.txt b/aoc2025/input/day07_provided.txt
deleted file mode 100644
index 57a2466..0000000
--- a/aoc2025/input/day07_provided.txt
+++ /dev/null
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diff --git a/aoc2025/input/day08.txt b/aoc2025/input/day08.txt
deleted file mode 100644
index 9df6b93..0000000
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diff --git a/aoc2025/input/day08_provided.txt b/aoc2025/input/day08_provided.txt
deleted file mode 100644
index e98a3b6..0000000
--- a/aoc2025/input/day08_provided.txt
+++ /dev/null
@@ -1,20 +0,0 @@
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diff --git a/aoc2025/input/day09.txt b/aoc2025/input/day09.txt
deleted file mode 100644
index 9c9aa1a..0000000
--- a/aoc2025/input/day09.txt
+++ /dev/null
@@ -1,496 +0,0 @@
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diff --git a/aoc2025/input/day09_provided.txt b/aoc2025/input/day09_provided.txt
deleted file mode 100644
index c8563ea..0000000
--- a/aoc2025/input/day09_provided.txt
+++ /dev/null
@@ -1,8 +0,0 @@
-7,1
-11,1
-11,7
-9,7
-9,5
-2,5
-2,3
-7,3
diff --git a/aoc2025/src/day01.rs b/aoc2025/src/day01.rs
deleted file mode 100644
index 43766af..0000000
--- a/aoc2025/src/day01.rs
+++ /dev/null
@@ -1,135 +0,0 @@
-use std::{fmt::Write, str::FromStr};
-
-use anyhow::{Result, bail};
-
-const INPUT: &str = include_str!("../input/day01.txt");
-const DIAL_SIZE: u16 = 100;
-
-pub fn run() -> Result<String> {
-    let mut res = String::with_capacity(128);
-    writeln!(res, "part 1: {}", part1(INPUT)?)?;
-    writeln!(res, "part 2: {}", part2(INPUT)?)?;
-    Ok(res)
-}
-
-enum Rotation {
-    Left(u16),
-    Right(u16),
-}
-
-impl FromStr for Rotation {
-    type Err = anyhow::Error;
-
-    fn from_str(s: &str) -> Result<Self> {
-        let dir = &s[..1];
-        let num = s[1..].parse()?;
-
-        match dir {
-            "L" => Ok(Rotation::Left(num)),
-            "R" => Ok(Rotation::Right(num)),
-            _ => bail!("rotation can only be left or right, got `{}'", dir),
-        }
-    }
-}
-
-impl Rotation {
-    fn apply(&self, state: u16) -> u16 {
-        match self {
-            Rotation::Left(num) => {
-                let num = num % DIAL_SIZE;
-                if num > state {
-                    DIAL_SIZE - (num - state)
-                } else {
-                    state - num
-                }
-            }
-            Rotation::Right(num) => (state + num) % DIAL_SIZE,
-        }
-    }
-
-    /// Counts the number of zeroes encountered while rotating the dial. Does NOT take the initial
-    /// state into account if it is 0.
-    fn apply_and_count_zeroes(&self, state: u16) -> (u16, usize) {
-        match self {
-            Rotation::Left(num) => {
-                let zeroes = (num / DIAL_SIZE) as usize;
-                let num = num % DIAL_SIZE;
-                if num > state {
-                    (
-                        DIAL_SIZE - (num - state),
-                        zeroes + if state != 0 { 1 } else { 0 },
-                    )
-                } else {
-                    let new_state = state - num;
-                    (new_state, zeroes + if new_state == 0 { 1 } else { 0 })
-                }
-            }
-            Rotation::Right(num) => (
-                (state + num) % DIAL_SIZE,
-                ((state + num) / DIAL_SIZE) as usize,
-            ),
-        }
-    }
-}
-
-fn part1(input: &str) -> Result<usize> {
-    let rotations = input
-        .lines()
-        .map(Rotation::from_str)
-        .collect::<Result<Vec<Rotation>>>()?;
-
-    let res = rotations
-        .iter()
-        .fold((50, 0), |(state, mut count), rot| {
-            let new_state = rot.apply(state);
-            if new_state == 0 {
-                count += 1;
-            }
-            (new_state, count)
-        })
-        .1;
-    Ok(res)
-}
-
-fn part2(input: &str) -> Result<usize> {
-    let rotations = input
-        .lines()
-        .map(Rotation::from_str)
-        .collect::<Result<Vec<Rotation>>>()?;
-
-    let res = rotations
-        .iter()
-        .fold((50, 0), |(state, count), rot| {
-            let (new_state, zeroes) = rot.apply_and_count_zeroes(state);
-            (new_state, count + zeroes)
-        })
-        .1;
-    Ok(res)
-}
-
-#[cfg(test)]
-mod tests {
-    use super::*;
-
-    const PROVIDED: &str = include_str!("../input/day01_provided.txt");
-
-    #[test]
-    fn part1_provided() {
-        assert_eq!(part1(PROVIDED).unwrap(), 3);
-    }
-
-    #[test]
-    fn part1_real() {
-        assert_eq!(part1(INPUT).unwrap(), 1092);
-    }
-
-    #[test]
-    fn part2_provided() {
-        assert_eq!(part2(PROVIDED).unwrap(), 6);
-    }
-
-    #[test]
-    fn part2_real() {
-        assert_eq!(part2(INPUT).unwrap(), 6616);
-    }
-}
diff --git a/aoc2025/src/day02.rs b/aoc2025/src/day02.rs
deleted file mode 100644
index 60613cf..0000000
--- a/aoc2025/src/day02.rs
+++ /dev/null
@@ -1,180 +0,0 @@
-use anyhow::{Context, Result, anyhow};
-use std::{fmt::Write, ops::RangeInclusive, str::FromStr};
-
-const INPUT: &str = include_str!("../input/day02.txt");
-
-pub fn run() -> Result<String> {
-    let mut res = String::with_capacity(128);
-    writeln!(res, "part 1: {}", part1(INPUT)?)?;
-    writeln!(res, "part 2: {}", part2(INPUT)?)?;
-    Ok(res)
-}
-
-struct IdRange(RangeInclusive<u64>);
-
-impl FromStr for IdRange {
-    type Err = anyhow::Error;
-
-    fn from_str(s: &str) -> Result<Self> {
-        let (left, right) = s
-            .split_once('-')
-            .ok_or_else(|| anyhow!("couldn't find dash in range: `{}'", s))?;
-        let (left, right) = (
-            left.parse()
-                .with_context(|| format!("couldn't parse left member of range: `{}'", left))?,
-            right
-                .trim()
-                .parse()
-                .with_context(|| format!("couldn't parse right member of range: `{}'", right))?,
-        );
-
-        Ok(IdRange(left..=right))
-    }
-}
-
-impl Iterator for IdRange {
-    type Item = <RangeInclusive<u64> as Iterator>::Item;
-
-    fn next(&mut self) -> Option<Self::Item> {
-        self.0.next()
-    }
-}
-
-fn get_num_digits(num: &u64) -> usize {
-    num.ilog10() as usize + 1
-}
-
-fn is_repeated_twice(num: &u64) -> bool {
-    let num_digits = get_num_digits(num);
-    if !num_digits.is_multiple_of(2) {
-        return false;
-    }
-    let half = num_digits / 2;
-    let mask = 10_u64.pow(half as u32);
-
-    *num / mask == *num % mask
-}
-
-fn part1(input: &str) -> Result<u64> {
-    let ranges = input
-        .split(',')
-        .map(IdRange::from_str)
-        .collect::<Result<Vec<_>>>()?;
-
-    Ok(ranges
-        .into_iter()
-        .map(|range| range.filter(is_repeated_twice).sum::<u64>())
-        .sum())
-}
-
-fn has_identical_chunks(num: &u64, chunk_size: usize) -> bool {
-    // build a "mask" for our chunk size
-    let mask = 10_u64.pow(chunk_size as u32);
-
-    // this is what all chunks should look like to satisfy our condition
-    let target = *num % mask;
-
-    let mut num = *num;
-    while num > target {
-        // shift num right by 10^(sub_digit_num)
-        num /= mask;
-        if num % mask != target {
-            return false;
-        }
-    }
-
-    true
-}
-
-fn is_repeated_at_least_twice(num: &u64) -> bool {
-    let num_digits = get_num_digits(num);
-    if num_digits < 2 {
-        return false;
-    }
-
-    has_identical_chunks(num, 1)
-        || (2..=(num_digits / 2)).any(|n| {
-            // walk all possible divisors of our number of digits
-            if !num_digits.is_multiple_of(n) {
-                return false;
-            }
-            let chunk_size = num_digits / n;
-            has_identical_chunks(num, chunk_size)
-        })
-}
-
-fn part2(input: &str) -> Result<u64> {
-    let ranges = input
-        .split(',')
-        .map(IdRange::from_str)
-        .collect::<Result<Vec<_>>>()?;
-
-    Ok(ranges
-        .into_iter()
-        .map(|range| range.filter(is_repeated_at_least_twice).sum::<u64>())
-        .sum())
-}
-
-#[cfg(test)]
-mod tests {
-    use super::*;
-
-    const PROVIDED: &str = include_str!("../input/day02_provided.txt");
-
-    #[test]
-    fn repeated_twice() {
-        assert!(is_repeated_twice(&11));
-        assert!(is_repeated_twice(&22));
-        assert!(is_repeated_twice(&99));
-        assert!(is_repeated_twice(&1010));
-        assert!(is_repeated_twice(&1188511885));
-        assert!(is_repeated_twice(&222222));
-        assert!(is_repeated_twice(&446446));
-        assert!(is_repeated_twice(&38593859));
-
-        assert!(!is_repeated_twice(&111));
-        assert!(!is_repeated_twice(&121));
-        assert!(!is_repeated_twice(&1));
-    }
-
-    #[test]
-    fn part1_provided() {
-        assert_eq!(part1(PROVIDED).unwrap(), 1227775554);
-    }
-
-    #[test]
-    fn part1_real() {
-        assert_eq!(part1(INPUT).unwrap(), 26255179562);
-    }
-
-    #[test]
-    fn repeated_at_least_twice() {
-        assert!(is_repeated_at_least_twice(&11));
-        assert!(is_repeated_at_least_twice(&22));
-        assert!(is_repeated_at_least_twice(&99));
-        assert!(is_repeated_at_least_twice(&111));
-        assert!(is_repeated_at_least_twice(&999));
-        assert!(is_repeated_at_least_twice(&1010));
-        assert!(is_repeated_at_least_twice(&1188511885));
-        assert!(is_repeated_at_least_twice(&222222));
-        assert!(is_repeated_at_least_twice(&446446));
-        assert!(is_repeated_at_least_twice(&38593859));
-        assert!(is_repeated_at_least_twice(&565656));
-        assert!(is_repeated_at_least_twice(&824824824));
-        assert!(is_repeated_at_least_twice(&2121212121));
-
-        assert!(!is_repeated_at_least_twice(&1121));
-        assert!(!is_repeated_at_least_twice(&121));
-        assert!(!is_repeated_at_least_twice(&1));
-    }
-
-    #[test]
-    fn part2_provided() {
-        assert_eq!(part2(PROVIDED).unwrap(), 4174379265);
-    }
-
-    #[test]
-    fn part2_real() {
-        assert_eq!(part2(INPUT).unwrap(), 31680313976);
-    }
-}
diff --git a/aoc2025/src/day03.rs b/aoc2025/src/day03.rs
deleted file mode 100644
index 7058be1..0000000
--- a/aoc2025/src/day03.rs
+++ /dev/null
@@ -1,105 +0,0 @@
-use std::{cmp, fmt::Write};
-
-use anyhow::{Context, Result};
-
-const INPUT: &str = include_str!("../input/day03.txt");
-
-pub fn run() -> Result<String> {
-    let mut res = String::with_capacity(128);
-    writeln!(res, "part 1: {}", part1(INPUT)?)?;
-    writeln!(res, "part 2: {}", part2(INPUT)?)?;
-    Ok(res)
-}
-
-fn find_max_digit(bank: &[u8]) -> Option<(usize, u8)> {
-    bank.iter()
-        .copied()
-        .enumerate()
-        // We want the max, but use min + Reverse because min selects the FIRST minimum, while max
-        // selects the LAST maximum, and we want the first (to leave more choices available to us
-        // for the units digit).
-        .min_by_key(|&(_idx, val)| cmp::Reverse(val))
-}
-
-fn compute_max_joltage(mut bank: &[u8], batteries: usize) -> Result<u64> {
-    let mut joltage = 0;
-    for battery in 0..batteries {
-        // We don't include the last [batteries - battery - 1] bytes since we need at least these other
-        // digits for the final number
-        let not_in_search = batteries - battery - 1;
-        let (idx, digit) = find_max_digit(&bank[..(bank.len() - not_in_search)])
-            .context("couldn't find max digit in bank")?;
-
-        let digit = (digit - b'0') as u64;
-        joltage = joltage * 10 + digit;
-        bank = &bank[(idx + 1)..];
-    }
-    Ok(joltage)
-}
-
-fn part1(input: &str) -> Result<u64> {
-    let mut sum = 0;
-    for line in input.lines() {
-        let joltage = compute_max_joltage(line.as_bytes(), 2)
-            .with_context(|| format!("couldn't compute joltage for bank `{}'", line))?;
-        sum += joltage;
-    }
-
-    Ok(sum)
-}
-
-fn part2(input: &str) -> Result<u64> {
-    let mut sum = 0;
-    for line in input.lines() {
-        let joltage = compute_max_joltage(line.as_bytes(), 12)
-            .with_context(|| format!("couldn't compute joltage for bank `{}'", line))?;
-        sum += joltage;
-    }
-
-    Ok(sum)
-}
-
-#[cfg(test)]
-mod tests {
-    use super::*;
-
-    const PROVIDED: &str = include_str!("../input/day03_provided.txt");
-
-    #[test]
-    fn part1_provided() {
-        assert_eq!(
-            compute_max_joltage("987654321111111".as_bytes(), 2).ok(),
-            Some(98)
-        );
-        assert_eq!(
-            compute_max_joltage("811111111111119".as_bytes(), 2).ok(),
-            Some(89)
-        );
-        assert_eq!(
-            compute_max_joltage("234234234234278".as_bytes(), 2).ok(),
-            Some(78)
-        );
-        assert_eq!(
-            compute_max_joltage("818181911112111".as_bytes(), 2).ok(),
-            Some(92)
-        );
-        // added this test to check for min + Reverse usage
-        assert_eq!(compute_max_joltage("9892".as_bytes(), 2).ok(), Some(99));
-        assert_eq!(part1(PROVIDED).unwrap(), 357);
-    }
-
-    #[test]
-    fn part1_real() {
-        assert_eq!(part1(INPUT).unwrap(), 17034);
-    }
-
-    #[test]
-    fn part2_provided() {
-        assert_eq!(part2(PROVIDED).unwrap(), 3121910778619);
-    }
-
-    #[test]
-    fn part2_real() {
-        assert_eq!(part2(INPUT).unwrap(), 168798209663590);
-    }
-}
diff --git a/aoc2025/src/day04.rs b/aoc2025/src/day04.rs
deleted file mode 100644
index 91f24ce..0000000
--- a/aoc2025/src/day04.rs
+++ /dev/null
@@ -1,151 +0,0 @@
-use std::{fmt::Write, str::FromStr};
-
-use anyhow::{Result, bail};
-
-const INPUT: &str = include_str!("../input/day04.txt");
-
-pub fn run() -> Result<String> {
-    let mut res = String::with_capacity(128);
-    writeln!(res, "part 1: {}", part1(INPUT)?)?;
-    writeln!(res, "part 2: {}", part2(INPUT)?)?;
-    Ok(res)
-}
-
-struct PaperRollsMap(Vec<Vec<bool>>);
-
-impl FromStr for PaperRollsMap {
-    type Err = anyhow::Error;
-
-    fn from_str(s: &str) -> Result<Self> {
-        let mut grid = Vec::new();
-
-        let mut width = None;
-        for line in s.lines() {
-            match width {
-                Some(size) => assert_eq!(size, line.len()),
-                None => width = Some(line.len()),
-            }
-
-            grid.push(
-                line.chars()
-                    .map(|c| match c {
-                        '@' => Ok(true),
-                        '.' => Ok(false),
-                        _ => bail!("unknown character `{}' while parsing grid", c),
-                    })
-                    .collect::<Result<Vec<_>>>()?,
-            );
-        }
-
-        Ok(Self(grid))
-    }
-}
-
-impl PaperRollsMap {
-    fn width(&self) -> usize {
-        self.0[0].len()
-    }
-
-    fn len(&self) -> usize {
-        self.0.len()
-    }
-
-    fn count_accessible_rolls(&self) -> usize {
-        let mut count = 0;
-        for y in 0..self.len() {
-            for x in 0..self.width() {
-                if self.0[y][x] && self.roll_is_accessible(x, y) {
-                    count += 1
-                }
-            }
-        }
-        count
-    }
-
-    fn roll_is_accessible(&self, x: usize, y: usize) -> bool {
-        let mut count = 0;
-        for dy in [-1, 0, 1] {
-            match y.checked_add_signed(dy) {
-                None => continue,
-                Some(yval) if yval == self.len() => continue,
-                Some(yval) => {
-                    for dx in [-1, 0, 1] {
-                        match x.checked_add_signed(dx) {
-                            None => continue,
-                            Some(xval) if xval == self.width() => continue,
-                            Some(xval) => {
-                                if self.0[yval][xval] {
-                                    count += 1
-                                }
-                            }
-                        }
-                    }
-                }
-            }
-        }
-        count <= 4
-    }
-
-    fn count_removable_rolls(&mut self) -> usize {
-        let mut count = 0;
-        loop {
-            let mut cur_loop_count = 0;
-            let mut copy = PaperRollsMap(self.0.clone());
-            for y in 0..self.len() {
-                for x in 0..self.width() {
-                    if self.0[y][x] && self.roll_is_accessible(x, y) {
-                        copy.0[y][x] = false;
-                        cur_loop_count += 1;
-                    }
-                }
-            }
-
-            if cur_loop_count == 0 {
-                break;
-            }
-
-            *self = copy;
-            count += cur_loop_count;
-        }
-        count
-    }
-}
-
-fn part1(input: &str) -> Result<usize> {
-    let grid: PaperRollsMap = input.parse()?;
-
-    Ok(grid.count_accessible_rolls())
-}
-
-fn part2(input: &str) -> Result<usize> {
-    let mut grid: PaperRollsMap = input.parse()?;
-
-    Ok(grid.count_removable_rolls())
-}
-
-#[cfg(test)]
-mod tests {
-    use super::*;
-
-    const PROVIDED: &str = include_str!("../input/day04_provided.txt");
-
-    #[test]
-    fn part1_provided() {
-        assert_eq!(part1(PROVIDED).unwrap(), 13);
-    }
-
-    #[test]
-    fn part1_real() {
-        assert_eq!(part1(INPUT).unwrap(), 1393);
-    }
-
-    #[test]
-    fn part2_provided() {
-        assert_eq!(part2(PROVIDED).unwrap(), 43);
-    }
-
-    #[test]
-    fn part2_real() {
-        assert_eq!(part2(INPUT).unwrap(), 8643);
-    }
-}
diff --git a/aoc2025/src/day05.rs b/aoc2025/src/day05.rs
deleted file mode 100644
index 9f506ca..0000000
--- a/aoc2025/src/day05.rs
+++ /dev/null
@@ -1,127 +0,0 @@
-use std::{
-    fmt::Write,
-    ops::{Bound, RangeBounds},
-};
-
-use anyhow::{Context, Result};
-
-const INPUT: &str = include_str!("../input/day05.txt");
-
-pub fn run() -> Result<String> {
-    let mut res = String::with_capacity(128);
-    writeln!(res, "part 1: {}", part1(INPUT)?)?;
-    writeln!(res, "part 2: {}", part2(INPUT)?)?;
-    Ok(res)
-}
-
-fn part1(input: &str) -> Result<u64> {
-    let mut fresh_id_ranges = Vec::new();
-    let mut available_ids = Vec::new();
-
-    let mut lines = input.lines();
-    for line in lines.by_ref() {
-        if line.is_empty() {
-            break;
-        }
-        let (left, right) = line
-            .split_once('-')
-            .with_context(|| format!("failed to split range `{}' on `-'", line))?;
-        let (left, right) = (left.parse::<u64>()?, right.parse::<u64>()?);
-        let range = left..=right;
-        fresh_id_ranges.push(range);
-    }
-
-    for line in lines {
-        available_ids.push(line.parse::<u64>()?);
-    }
-
-    let mut count = 0;
-    for id in available_ids {
-        for range in &fresh_id_ranges {
-            if range.contains(&id) {
-                count += 1;
-                break;
-            }
-        }
-    }
-
-    Ok(count)
-}
-
-fn part2(input: &str) -> Result<usize> {
-    let mut fresh_id_ranges = Vec::new();
-
-    for line in input.lines() {
-        if line.is_empty() {
-            break;
-        }
-        let (left, right) = line
-            .split_once('-')
-            .with_context(|| format!("failed to split range `{}' on `-'", line))?;
-        let (left, right) = (left.parse::<u64>()?, right.parse::<u64>()?);
-        let range = left..=right;
-        fresh_id_ranges.push(range);
-    }
-
-    // sort all ranges to prepare for merging of overlapping ranges
-    let mut new_ranges = Vec::new();
-    fresh_id_ranges.sort_by_key(|range| match (range.start_bound(), range.end_bound()) {
-        (Bound::Included(&beg), Bound::Included(&end)) => (beg, end),
-        _ => unreachable!("We're only handling inclusive ranges"),
-    });
-
-    let mut fresh_id_ranges = fresh_id_ranges.into_iter();
-    new_ranges.push(
-        fresh_id_ranges
-            .next()
-            .context("Input did not contain any ranges!")?,
-    );
-    for range in fresh_id_ranges {
-        let latest = new_ranges
-            .last_mut()
-            .expect("new_ranges always contains at least one element");
-        let (last_start, last_end) = match (latest.start_bound(), latest.end_bound()) {
-            (Bound::Included(&beg), Bound::Included(&end)) => (beg, end),
-            _ => unreachable!("We're only handling inclusive ranges"),
-        };
-        let (cur_start, cur_end) = match (range.start_bound(), range.end_bound()) {
-            (Bound::Included(&beg), Bound::Included(&end)) => (beg, end),
-            _ => unreachable!("We're only handling inclusive ranges"),
-        };
-
-        if cur_start <= last_end + 1 {
-            *latest = (last_start)..=(last_end.max(cur_end));
-        } else {
-            new_ranges.push(range);
-        }
-    }
-
-    Ok(new_ranges.into_iter().map(|r| r.count()).sum())
-}
-
-#[cfg(test)]
-mod tests {
-    use super::*;
-
-    const PROVIDED: &str = include_str!("../input/day05_provided.txt");
-
-    #[test]
-    fn part1_provided() {
-        assert_eq!(part1(PROVIDED).unwrap(), 3);
-    }
-
-    #[test]
-    fn part1_real() {
-        assert_eq!(part1(INPUT).unwrap(), 509);
-    }
-
-    #[test]
-    fn part2_provided() {
-        assert_eq!(part2(PROVIDED).unwrap(), 14);
-    }
-
-    #[test]
-    fn part2_real() {
-        assert_eq!(part2(INPUT).unwrap(), 336790092076620);
-    }
-}
diff --git a/aoc2025/src/day06.rs b/aoc2025/src/day06.rs
deleted file mode 100644
index 86077d4..0000000
--- a/aoc2025/src/day06.rs
+++ /dev/null
@@ -1,199 +0,0 @@
-use std::{fmt::Write, str::FromStr};
-
-use anyhow::{Context, Result, bail};
-
-const INPUT: &str = include_str!("../input/day06.txt");
-
-pub fn run() -> Result<String> {
-    let mut res = String::with_capacity(128);
-    writeln!(res, "part 1: {}", part1(INPUT)?)?;
-    writeln!(res, "part 2: {}", part2(INPUT)?)?;
-    Ok(res)
-}
-
-#[derive(Debug, Clone, Copy)]
-enum MathOp {
-    Add,
-    Mult,
-}
-
-impl FromStr for MathOp {
-    type Err = anyhow::Error;
-
-    fn from_str(s: &str) -> Result<Self> {
-        match s {
-            "+" => Ok(MathOp::Add),
-            "*" => Ok(MathOp::Mult),
-            _ => bail!("cannot parse `{}' as MathOp", s),
-        }
-    }
-}
-
-#[derive(Debug, Clone)]
-struct MathProblem {
-    numbers: Vec<u64>,
-    op: MathOp,
-}
-
-impl MathProblem {
-    fn compute(&self) -> u64 {
-        match self.op {
-            MathOp::Add => self.numbers.iter().sum(),
-            MathOp::Mult => self.numbers.iter().product(),
-        }
-    }
-}
-
-fn part1(input: &str) -> Result<u64> {
-    let mut numbers: Vec<Vec<u64>> = Vec::new();
-    let mut ops = Vec::new();
-
-    for line in input.lines() {
-        let line = line.trim();
-        if line
-            .chars()
-            .next()
-            .context("got an empty line")?
-            .is_ascii_punctuation()
-        {
-            ops = line
-                .split_ascii_whitespace()
-                .map(|c| c.parse::<MathOp>())
-                .collect::<Result<_>>()?;
-            break;
-        }
-
-        let split_line = line.trim().split_ascii_whitespace();
-        let width = split_line.clone().count();
-        if !numbers.is_empty() && numbers.len() != width {
-            bail!(
-                "all input lines should have the same number of columns: current line has {}, previous lines had {}",
-                width,
-                numbers.len()
-            );
-        }
-        if numbers.is_empty() {
-            for _ in 0..width {
-                numbers.push(Vec::new());
-            }
-        }
-
-        for (idx, num) in split_line.enumerate() {
-            numbers[idx].push(num.parse::<u64>()?);
-        }
-    }
-
-    Ok(ops
-        .into_iter()
-        .zip(numbers)
-        .map(|(op, numbers)| MathProblem { numbers, op })
-        .map(|problem| problem.compute())
-        .sum())
-}
-
-fn part2(input: &str) -> Result<u64> {
-    let mut numbers: Vec<Vec<u8>> = Vec::new();
-    let mut ops = Vec::new();
-
-    for line in input.lines() {
-        if line
-            .chars()
-            .next()
-            .context("got an empty line")?
-            .is_ascii_punctuation()
-        {
-            ops = line
-                .split_ascii_whitespace()
-                .map(|c| c.parse::<MathOp>())
-                .collect::<Result<_>>()?;
-            break;
-        }
-
-        let line = line.as_bytes().to_vec();
-        if !numbers.is_empty() && numbers[0].len() != line.len() {
-            bail!(
-                "all input lines should have the same number of columns: current line has {}, previous lines had {}",
-                line.len(),
-                numbers[0].len(),
-            );
-        }
-        numbers.push(line);
-    }
-
-    if numbers.is_empty() {
-        bail!("input had no numbers");
-    }
-
-    let mut parsed_numbers = Vec::new();
-    let mut cur_problem_numbers = Vec::new();
-    for col in 0..numbers[0].len() {
-        fn col_is_empty(col: usize, numbers: &[Vec<u8>]) -> bool {
-            (0..numbers.len()).all(|line| numbers[line][col].is_ascii_whitespace())
-        }
-
-        if col_is_empty(col, &numbers) {
-            parsed_numbers.push(cur_problem_numbers);
-            cur_problem_numbers = Vec::new();
-            continue;
-        }
-
-        let mut num = 0;
-        for line in &numbers {
-            let chr = line[col];
-            if chr.is_ascii_whitespace() {
-                continue;
-            }
-            if !chr.is_ascii_digit() {
-                bail!("input contained non-digit ascii character: `{}'", chr)
-            }
-            let digit = (chr - b'0') as u64;
-            num *= 10;
-            num += digit;
-        }
-        cur_problem_numbers.push(num);
-    }
-    if !cur_problem_numbers.is_empty() {
-        parsed_numbers.push(cur_problem_numbers);
-    }
-    if parsed_numbers.len() != ops.len() {
-        bail!(
-            "got a different number of number sets ({}) and operators ({})",
-            parsed_numbers.len(),
-            ops.len()
-        );
-    }
-
-    Ok(ops
-        .into_iter()
-        .zip(parsed_numbers)
-        .map(|(op, numbers)| MathProblem { numbers, op })
-        .map(|problem| problem.compute())
-        .sum())
-}
-
-#[cfg(test)]
-mod tests {
-    use super::*;
-
-    const PROVIDED: &str = include_str!("../input/day06_provided.txt");
-
-    #[test]
-    fn part1_provided() {
-        assert_eq!(part1(PROVIDED).unwrap(), 4277556);
-    }
-
-    #[test]
-    fn part1_real() {
-        assert_eq!(part1(INPUT).unwrap(), 5316572080628);
-    }
-
-    #[test]
-    fn part2_provided() {
-        assert_eq!(part2(PROVIDED).unwrap(), 3263827);
-    }
-
-    #[test]
-    fn part2_real() {
-        assert_eq!(part2(INPUT).unwrap(), 11299263623062);
-    }
-}
diff --git a/aoc2025/src/day07.rs b/aoc2025/src/day07.rs
deleted file mode 100644
index ad3ac30..0000000
--- a/aoc2025/src/day07.rs
+++ /dev/null
@@ -1,206 +0,0 @@
-use anyhow::{Result, anyhow, bail};
-use std::{
-    collections::{HashMap, hash_map::Entry},
-    fmt::Write,
-    str::FromStr,
-};
-
-const INPUT: &str = include_str!("../input/day07.txt");
-
-pub fn run() -> Result<String> {
-    let mut res = String::with_capacity(128);
-    writeln!(res, "part 1: {}", part1(INPUT)?)?;
-    writeln!(res, "part 2: {}", part2(INPUT)?)?;
-    Ok(res)
-}
-
-#[derive(Debug, Copy, Clone)]
-enum DiagramCell {
-    Source,
-    EmptySpace,
-    Splitter,
-}
-
-impl FromStr for DiagramCell {
-    type Err = anyhow::Error;
-
-    fn from_str(s: &str) -> Result<Self> {
-        match s {
-            "S" => Ok(DiagramCell::Source),
-            "." => Ok(DiagramCell::EmptySpace),
-            "^" => Ok(DiagramCell::Splitter),
-            _ => Err(anyhow!(
-                "cannot parse unexpected string `{}' as DiagramCell",
-                s
-            )),
-        }
-    }
-}
-
-#[derive(Debug, Clone)]
-struct ManifoldDiagram {
-    grid: Vec<Vec<DiagramCell>>,
-    source_coords: (usize, usize),
-}
-
-impl FromStr for ManifoldDiagram {
-    type Err = anyhow::Error;
-
-    fn from_str(s: &str) -> Result<Self> {
-        let mut grid = Vec::new();
-        let mut source_coords = None;
-        for (line_idx, line) in s.lines().enumerate() {
-            let mut grid_line = Vec::new();
-            for cell_idx in 0..line.len() {
-                let cell = line[cell_idx..=cell_idx].parse()?;
-                if let DiagramCell::Source = cell {
-                    match source_coords {
-                        None => source_coords = Some((cell_idx, line_idx)),
-                        Some(_) => bail!("found two different sources in diagram"),
-                    }
-                }
-                grid_line.push(cell);
-            }
-            grid.push(grid_line);
-        }
-
-        source_coords
-            .ok_or(anyhow!("couldn't find source in diagram"))
-            .map(|source_coords| Self {
-                grid,
-                source_coords,
-            })
-    }
-}
-
-impl ManifoldDiagram {
-    fn count_ray_splits(&self) -> usize {
-        let mut ray_sources = vec![self.source_coords];
-        // TODO: we use a HashMap<(usize, usize), ()> because a HashSet doesn't have `entry` methods in stable:
-        // https://github.com/rust-lang/rust/issues/60896
-        let mut used_splitters = HashMap::new();
-
-        let mut count = 0;
-        while let Some(ray_source) = ray_sources.pop() {
-            let (x, mut y) = ray_source;
-            y += 1;
-            while y < self.grid.len()
-                && let DiagramCell::EmptySpace = self.grid[y][x]
-            {
-                y += 1;
-            }
-
-            if y == self.grid.len() {
-                // We've reached the end of the diagram, we can stop computing this ray
-                continue;
-            }
-            // otherwise, we've hit a splitter (unless there are multiple sources, which shouldn't happen)
-            if let DiagramCell::Splitter = self.grid[y][x] {
-                // make sure we don't exit the grid when splitting, shouldn't happen
-                assert!(x > 0 && x < (self.grid[0].len() - 1));
-
-                if let Entry::Vacant(e) = used_splitters.entry((x, y)) {
-                    e.insert(());
-                } else {
-                    continue;
-                }
-                ray_sources.push((x - 1, y));
-                ray_sources.push((x + 1, y));
-                count += 1;
-            }
-        }
-
-        count
-    }
-
-    // This is an iterative implementation of the obvious recursive algorithm for Part 2. It's
-    // probably unnecessarily complex written this way, it ended up that way because I reused the
-    // Part 1 code and felt it was faster to adapt it rather than rewrite the recursive version :)
-    fn count_timelines(&self) -> usize {
-        let mut ray_sources = vec![self.source_coords];
-        let mut timelines_from: HashMap<(usize, usize), usize> = HashMap::new();
-
-        while let Some(ray_source) = ray_sources.pop() {
-            let (x, mut y) = ray_source;
-            y += 1;
-            while y < self.grid.len()
-                && let DiagramCell::EmptySpace = self.grid[y][x]
-            {
-                y += 1;
-            }
-
-            if y == self.grid.len() {
-                // We've reached the end of the diagram, this ray is a single timeline
-                timelines_from.insert(ray_source, 1);
-                continue;
-            }
-
-            // Otherwise, we've hit a splitter (unless there are multiple sources, which shouldn't happen)
-            if let DiagramCell::Splitter = self.grid[y][x] {
-                // Make sure we don't exit the grid when splitting, shouldn't happen
-                assert!(x > 0 && x < (self.grid[0].len() - 1));
-                let (ray_left, ray_right) = ((x - 1, y), (x + 1, y));
-
-                let left = timelines_from.get(&ray_left);
-                let right = timelines_from.get(&ray_right);
-                match (left, right) {
-                    (Some(res_left), Some(res_right)) => {
-                        timelines_from.insert(ray_source, res_left + res_right);
-                    }
-                    (None, Some(_)) => {
-                        ray_sources.push(ray_source);
-                        ray_sources.push(ray_left);
-                    }
-                    (Some(_), None) => {
-                        ray_sources.push(ray_source);
-                        ray_sources.push(ray_right);
-                    }
-                    (None, None) => {
-                        ray_sources.push(ray_source);
-                        ray_sources.push(ray_left);
-                        ray_sources.push(ray_right);
-                    }
-                }
-            }
-        }
-
-        *timelines_from.get(&self.source_coords).unwrap()
-    }
-}
-
-fn part1(input: &str) -> Result<usize> {
-    let diagram = input.parse::<ManifoldDiagram>()?;
-    Ok(diagram.count_ray_splits())
-}
-
-fn part2(input: &str) -> Result<usize> {
-    let diagram = input.parse::<ManifoldDiagram>()?;
-    Ok(diagram.count_timelines())
-}
-
-#[cfg(test)]
-mod tests {
-    use super::*;
-
-    const PROVIDED: &str = include_str!("../input/day07_provided.txt");
-
-    #[test]
-    fn part1_provided() {
-        assert_eq!(part1(PROVIDED).unwrap(), 21);
-    }
-
-    #[test]
-    fn part1_real() {
-        assert_eq!(part1(INPUT).unwrap(), 1537);
-    }
-
-    #[test]
-    fn part2_provided() {
-        assert_eq!(part2(PROVIDED).unwrap(), 40);
-    }
-
-    #[test]
-    fn part2_real() {
-        assert_eq!(part2(INPUT).unwrap(), 18818811755665);
-    }
-}
diff --git a/aoc2025/src/day08.rs b/aoc2025/src/day08.rs
deleted file mode 100644
index a6aaa89..0000000
--- a/aoc2025/src/day08.rs
+++ /dev/null
@@ -1,230 +0,0 @@
-use anyhow::{Context, Result, bail};
-use std::{collections::HashMap, fmt::Write, hash::Hash, str::FromStr};
-
-const INPUT: &str = include_str!("../input/day08.txt");
-
-pub fn run() -> Result<String> {
-    let mut res = String::with_capacity(128);
-    writeln!(res, "part 1: {}", part1(INPUT, 1000)?)?;
-    writeln!(res, "part 2: {}", part2(INPUT)?)?;
-    Ok(res)
-}
-
-#[derive(Debug, Clone, Copy, Hash, PartialEq, Eq)]
-struct JunctionBox {
-    x: usize,
-    y: usize,
-    z: usize,
-}
-
-impl FromStr for JunctionBox {
-    type Err = anyhow::Error;
-
-    fn from_str(s: &str) -> Result<Self> {
-        let (x, rest) = s
-            .split_once(',')
-            .context("couldn't split JunctionBox coordinates on comma")?;
-        let (y, z) = rest
-            .split_once(',')
-            .context("couldn't split JunctionBox coordinates on second comma")?;
-
-        let x = x.parse()?;
-        let y = y.parse()?;
-        let z = z.parse()?;
-
-        Ok(Self { x, y, z })
-    }
-}
-
-impl JunctionBox {
-    fn distance_to(&self, other: &JunctionBox) -> f64 {
-        ((self.x as f64 - other.x as f64).powi(2)
-            + (self.y as f64 - other.y as f64).powi(2)
-            + (self.z as f64 - other.z as f64).powi(2))
-        .sqrt()
-    }
-}
-
-#[derive(Debug, Clone, Copy, PartialEq, Eq)]
-struct UnionFindKey(usize);
-
-/// UnionFind implementation that maintains a circular linked list in addition to the usual tree for
-/// each disjoint subset, allowing easy iteration on a subset's members.
-struct UnionFind<T: Sized + Hash> {
-    members_to_keys: HashMap<T, UnionFindKey>,
-    parent: Vec<UnionFindKey>,
-    #[allow(unused)]
-    next: Vec<UnionFindKey>,
-    size: Vec<usize>,
-}
-
-impl<T: Sized + Hash + Eq> UnionFind<T> {
-    fn from(members: Vec<T>) -> Self {
-        let keys: Vec<UnionFindKey> = (0..members.len()).map(UnionFindKey).collect();
-        Self {
-            parent: keys.clone(),
-            next: keys.clone(),
-            size: (0..members.len()).map(|_| 1).collect(),
-            members_to_keys: members.into_iter().zip(keys).collect(),
-        }
-    }
-
-    fn size(&self) -> usize {
-        self.parent.len()
-    }
-
-    fn get_key(&self, member: &T) -> Result<UnionFindKey> {
-        self.members_to_keys
-            .get(member)
-            .context("unknown member")
-            .copied()
-    }
-
-    fn union(&mut self, left: &T, right: &T) -> Result<UnionFindKey> {
-        let left = self.get_key(left)?;
-        let right = self.get_key(right)?;
-        Ok(self.union_by_key(left, right))
-    }
-
-    fn union_by_key(&mut self, left: UnionFindKey, right: UnionFindKey) -> UnionFindKey {
-        let mut left_root = self.find_by_key(left);
-        let mut right_root = self.find_by_key(right);
-
-        if left_root == right_root {
-            return left_root;
-        }
-
-        if self.size[left_root.0] < self.size[right_root.0] {
-            (left_root, right_root) = (right_root, left_root)
-        }
-
-        self.parent[right_root.0] = left_root;
-        let new_size = self.size[left_root.0] + self.size[right_root.0];
-        self.size[left_root.0] = new_size;
-
-        left_root
-    }
-
-    #[allow(unused)]
-    fn find(&mut self, member: &T) -> Result<UnionFindKey> {
-        let key = self.get_key(member)?;
-        Ok(self.find_by_key(key))
-    }
-
-    // This could be implemented with &self using interior mutability...
-    fn find_by_key(&mut self, key: UnionFindKey) -> UnionFindKey {
-        if key != self.parent[key.0] {
-            self.parent[key.0] = self.find_by_key(self.parent[key.0]);
-        }
-
-        self.parent[key.0]
-    }
-
-    fn roots(&self) -> impl Iterator<Item = UnionFindKey> {
-        self.parent
-            .iter()
-            .enumerate()
-            .filter_map(|(idx, &key)| if idx == key.0 { Some(key) } else { None })
-    }
-
-    fn get_size(&mut self, key: UnionFindKey) -> usize {
-        let root = self.find_by_key(key);
-        self.size[root.0]
-    }
-}
-
-fn part1(input: &str, connections: usize) -> Result<usize> {
-    let points = input
-        .lines()
-        .map(JunctionBox::from_str)
-        .collect::<Result<Vec<_>>>()?;
-
-    let mut distances = Vec::new();
-    for (i, &pi) in points.iter().enumerate() {
-        for &pj in points.iter().skip(i + 1) {
-            distances.push((pi.distance_to(&pj), (pi, pj)));
-        }
-    }
-    distances.sort_by(|(dist1, _), (dist2, _)| dist1.total_cmp(dist2));
-    if connections > distances.len() {
-        bail!(
-            "There are less possible matchings than the required number of connections: {} matchings",
-            distances.len()
-        );
-    }
-
-    let mut uf = UnionFind::from(points);
-    for (_, (p1, p2)) in distances.into_iter().take(connections) {
-        uf.union(&p1, &p2)?;
-    }
-
-    let roots = uf.roots().collect::<Vec<_>>();
-    let mut sizes = roots.iter().map(|r| uf.get_size(*r)).collect::<Vec<_>>();
-    sizes.sort_by_key(|v| std::cmp::Reverse(*v));
-
-    Ok(sizes[0] * sizes[1] * sizes[2])
-}
-
-fn part2(input: &str) -> Result<usize> {
-    let points = input
-        .lines()
-        .map(JunctionBox::from_str)
-        .collect::<Result<Vec<_>>>()?;
-
-    let mut distances = Vec::new();
-    for (i, &pi) in points.iter().enumerate() {
-        for &pj in points.iter().skip(i + 1) {
-            distances.push((pi.distance_to(&pj), (pi, pj)));
-        }
-    }
-    distances.sort_by(|(dist1, _), (dist2, _)| dist1.total_cmp(dist2));
-
-    let mut uf = UnionFind::from(points);
-    let mut unions = 0;
-    let mut last_pair = None;
-    for (_, (p1, p2)) in distances {
-        if unions >= (uf.size() - 1) {
-            break;
-        }
-        last_pair = Some((p1, p2));
-
-        if uf.find(&p1)? == uf.find(&p2)? {
-            continue;
-        }
-
-        uf.union(&p1, &p2)?;
-        unions += 1;
-    }
-
-    Ok(match last_pair {
-        Some((p1, p2)) => p1.x * p2.x,
-        None => bail!("points was empty?"),
-    })
-}
-
-#[cfg(test)]
-mod tests {
-    use super::*;
-
-    const PROVIDED: &str = include_str!("../input/day08_provided.txt");
-
-    #[test]
-    fn part1_provided() {
-        assert_eq!(part1(PROVIDED, 10).unwrap(), 40);
-    }
-
-    #[test]
-    fn part1_real() {
-        assert_eq!(part1(INPUT, 1000).unwrap(), 127551);
-    }
-
-    #[test]
-    fn part2_provided() {
-        assert_eq!(part2(PROVIDED).unwrap(), 25272);
-    }
-
-    #[test]
-    fn part2_real() {
-        assert_eq!(part2(INPUT).unwrap(), 2347225200);
-    }
-}
diff --git a/aoc2025/src/day09.rs b/aoc2025/src/day09.rs
deleted file mode 100644
index 90ff1af..0000000
--- a/aoc2025/src/day09.rs
+++ /dev/null
@@ -1,164 +0,0 @@
-use anyhow::{Context, Result, anyhow};
-use std::{fmt::Write, str::FromStr};
-
-const INPUT: &str = include_str!("../input/day09.txt");
-
-pub fn run() -> Result<String> {
-    let mut res = String::with_capacity(128);
-    writeln!(res, "part 1: {}", part1(INPUT)?)?;
-    writeln!(res, "part 2: {}", part2(INPUT)?)?;
-    Ok(res)
-}
-
-#[derive(Debug, Clone, Copy, PartialEq, Eq)]
-struct Point {
-    x: usize,
-    y: usize,
-}
-
-impl FromStr for Point {
-    type Err = anyhow::Error;
-
-    fn from_str(s: &str) -> Result<Self> {
-        let (x, y) = s
-            .split_once(',')
-            .with_context(|| format!("couldn't parse point `{}'", s))?;
-        let (x, y) = (x.parse()?, y.parse()?);
-
-        Ok(Self { x, y })
-    }
-}
-
-fn rectangle_area(p1: &Point, p2: &Point) -> usize {
-    (p1.x.max(p2.x) - p1.x.min(p2.x) + 1) * (p1.y.max(p2.y) - p1.y.min(p2.y) + 1)
-}
-
-fn part1(input: &str) -> Result<usize> {
-    let points = input
-        .lines()
-        .map(|line| line.parse::<Point>())
-        .collect::<Result<Vec<_>>>()?;
-
-    let mut max = None;
-    for (idx, p1) in points.iter().enumerate() {
-        for p2 in points.iter().skip(idx + 1) {
-            let area = rectangle_area(p1, p2);
-            match max {
-                Some(m) => max = Some(area.max(m)),
-                None => max = Some(area),
-            }
-        }
-    }
-
-    max.ok_or_else(|| anyhow!("input was empty"))
-}
-
-// Computes whether a segment crosses through our rectangle.
-//
-// Since edges are always parallel to axes, this is easier than in the general case
-fn edge_intersects(&(e1, e2): &(Point, Point), (r1, r2): (&Point, &Point)) -> bool {
-    let (rect_xmin, rect_xmax) = (r1.x.min(r2.x), r1.x.max(r2.x));
-    let (rect_ymin, rect_ymax) = (r1.y.min(r2.y), r1.y.max(r2.y));
-
-    #[allow(clippy::nonminimal_bool)]
-    if e1.x == e2.x {
-        // segment is vertical
-        let edge_ymin = e1.y.min(e2.y);
-        let edge_ymax = e1.y.max(e2.y);
-        (rect_xmin < e1.x && e1.x < rect_xmax ) // we're in the right X range to cross
-            && ((edge_ymin <= rect_ymin && edge_ymax >= rect_ymax) // segment crosses through both sides
-                || (edge_ymin <= rect_ymin && rect_ymin < edge_ymax) // segment crosses through bottom edge
-                || (edge_ymin < rect_ymax && edge_ymax >= rect_ymax) // segment crosses through top edge
-                )
-    } else {
-        // segment is horizontal
-        let edge_xmin = e1.x.min(e2.x);
-        let edge_xmax = e1.x.max(e2.x);
-        (rect_ymin < e1.y && e1.y < rect_ymax ) // we're in the right X range to cross
-            && ((edge_xmin <= rect_xmin && edge_xmax >= rect_xmax) // segment crosses through both sides
-                || (edge_xmin <= rect_xmin && rect_xmin < edge_xmax) // segment crosses through bottom edge
-                || (edge_xmin < rect_xmax && edge_xmax >= rect_xmax) // segment crosses through top edge
-                )
-    }
-}
-
-fn part2(input: &str) -> Result<usize> {
-    let points = input
-        .lines()
-        .map(|line| line.parse::<Point>())
-        .collect::<Result<Vec<_>>>()?;
-
-    let mut edges = points.windows(2).map(|w| (w[0], w[1])).collect::<Vec<_>>();
-    edges.push((
-        *points.last().context("input was empty")?,
-        *points.first().context("input was empty")?,
-    ));
-
-    let mut max = None;
-    for (idx, p1) in points.iter().enumerate() {
-        for p2 in points.iter().skip(idx + 1) {
-            if edges.iter().any(|e| edge_intersects(e, (p1, p2))) {
-                // If an edge crosses through our rectangle then one side of the edge is obviously
-                // outside our polygon.
-                //
-                // Generally, this isn't sufficient to guarantee that a rectangle is "valid".
-                // Consider the following polygon:
-                //
-                // ..........
-                // .#X1..#X#.
-                // .XXX..XXX.
-                // .XX#XX2XX.
-                // .#XXXXXX#.
-                // ..........
-                //
-                // The rectangle between 1 and 2 isn't crossed by any edge, yet it is outside the
-                // polygon. However looking at the shape of my input (which more or less looks like
-                // a rasterized circle), it's obvious that this kind of edge case will never happen
-                // for rectangles large enough to be of maximal area.
-                continue;
-            }
-            let area = rectangle_area(p1, p2);
-            match max {
-                Some(m) => max = Some(area.max(m)),
-                None => max = Some(area),
-            }
-        }
-    }
-
-    max.ok_or_else(|| anyhow!("input was empty"))
-}
-
-#[cfg(test)]
-mod tests {
-    use super::*;
-
-    const PROVIDED: &str = include_str!("../input/day09_provided.txt");
-
-    #[test]
-    fn part1_provided() {
-        assert_eq!(part1(PROVIDED).unwrap(), 50);
-    }
-
-    #[test]
-    fn part1_real() {
-        assert_eq!(part1(INPUT).unwrap(), 4758121828);
-    }
-
-    #[test]
-    fn part2_provided() {
-        assert!(edge_intersects(
-            &(Point { x: 7, y: 3 }, Point { x: 7, y: 1 }),
-            (&Point { x: 2, y: 5 }, &Point { x: 11, y: 1 })
-        ));
-        assert!(edge_intersects(
-            &(Point { x: 9, y: 5 }, Point { x: 2, y: 5 }),
-            (&Point { x: 9, y: 7 }, &Point { x: 2, y: 3 })
-        ));
-        assert_eq!(part2(PROVIDED).unwrap(), 24);
-    }
-
-    #[test]
-    fn part2_real() {
-        assert_eq!(part2(INPUT).unwrap(), 1577956170);
-    }
-}
diff --git a/aoc2025/src/lib.rs b/aoc2025/src/lib.rs
deleted file mode 100644
index a8fc1a9..0000000
--- a/aoc2025/src/lib.rs
+++ /dev/null
@@ -1,9 +0,0 @@
-pub mod day01;
-pub mod day02;
-pub mod day03;
-pub mod day04;
-pub mod day05;
-pub mod day06;
-pub mod day07;
-pub mod day08;
-pub mod day09;
diff --git a/aoc2025/src/main.rs b/aoc2025/src/main.rs
deleted file mode 100644
index daa8ec3..0000000
--- a/aoc2025/src/main.rs
+++ /dev/null
@@ -1,29 +0,0 @@
-use anyhow::Result;
-
-use aoc::DayFunc;
-
-use aoc2025::day01;
-use aoc2025::day02;
-use aoc2025::day03;
-use aoc2025::day04;
-use aoc2025::day05;
-use aoc2025::day06;
-use aoc2025::day07;
-use aoc2025::day08;
-use aoc2025::day09;
-
-fn main() -> Result<()> {
-    let days: &[DayFunc] = &[
-        day01::run,
-        day02::run,
-        day03::run,
-        day04::run,
-        day05::run,
-        day06::run,
-        day07::run,
-        day08::run,
-        day09::run,
-    ];
-
-    aoc::run(days)
-}
diff --git a/flake.lock b/flake.lock
deleted file mode 100644
index fab776e..0000000
--- a/flake.lock
+++ /dev/null
@@ -1,96 +0,0 @@
-{
-  "nodes": {
-    "flake-utils": {
-      "inputs": {
-        "systems": "systems"
-      },
-      "locked": {
-        "lastModified": 1694529238,
-        "narHash": "sha256-zsNZZGTGnMOf9YpHKJqMSsa0dXbfmxeoJ7xHlrt+xmY=",
-        "owner": "numtide",
-        "repo": "flake-utils",
-        "rev": "ff7b65b44d01cf9ba6a71320833626af21126384",
-        "type": "github"
-      },
-      "original": {
-        "owner": "numtide",
-        "repo": "flake-utils",
-        "type": "github"
-      }
-    },
-    "nixpkgs": {
-      "locked": {
-        "lastModified": 1764522689,
-        "narHash": "sha256-SqUuBFjhl/kpDiVaKLQBoD8TLD+/cTUzzgVFoaHrkqY=",
-        "owner": "NixOS",
-        "repo": "nixpkgs",
-        "rev": "8bb5646e0bed5dbd3ab08c7a7cc15b75ab4e1d0f",
-        "type": "github"
-      },
-      "original": {
-        "owner": "NixOS",
-        "ref": "nixos-25.11",
-        "repo": "nixpkgs",
-        "type": "github"
-      }
-    },
-    "nixpkgs_2": {
-      "locked": {
-        "lastModified": 1744536153,
-        "narHash": "sha256-awS2zRgF4uTwrOKwwiJcByDzDOdo3Q1rPZbiHQg/N38=",
-        "owner": "NixOS",
-        "repo": "nixpkgs",
-        "rev": "18dd725c29603f582cf1900e0d25f9f1063dbf11",
-        "type": "github"
-      },
-      "original": {
-        "owner": "NixOS",
-        "ref": "nixpkgs-unstable",
-        "repo": "nixpkgs",
-        "type": "github"
-      }
-    },
-    "root": {
-      "inputs": {
-        "flake-utils": "flake-utils",
-        "nixpkgs": "nixpkgs",
-        "rust-overlay": "rust-overlay"
-      }
-    },
-    "rust-overlay": {
-      "inputs": {
-        "nixpkgs": "nixpkgs_2"
-      },
-      "locked": {
-        "lastModified": 1764557621,
-        "narHash": "sha256-kX5PoY8hQZ80+amMQgOO9t8Tc1JZ70gYRnzaVD4AA+o=",
-        "owner": "oxalica",
-        "repo": "rust-overlay",
-        "rev": "93316876c2229460a5d6f5f052766cc4cef538ce",
-        "type": "github"
-      },
-      "original": {
-        "owner": "oxalica",
-        "repo": "rust-overlay",
-        "type": "github"
-      }
-    },
-    "systems": {
-      "locked": {
-        "lastModified": 1681028828,
-        "narHash": "sha256-Vy1rq5AaRuLzOxct8nz4T6wlgyUR7zLU309k9mBC768=",
-        "owner": "nix-systems",
-        "repo": "default",
-        "rev": "da67096a3b9bf56a91d16901293e51ba5b49a27e",
-        "type": "github"
-      },
-      "original": {
-        "owner": "nix-systems",
-        "repo": "default",
-        "type": "github"
-      }
-    }
-  },
-  "root": "root",
-  "version": 7
-}
diff --git a/flake.nix b/flake.nix
deleted file mode 100644
index f8c01dd..0000000
--- a/flake.nix
+++ /dev/null
@@ -1,34 +0,0 @@
-{
-  inputs = {
-    nixpkgs.url = "github:NixOS/nixpkgs/nixos-25.11";
-    rust-overlay.url = "github:oxalica/rust-overlay";
-    flake-utils.url = "github:numtide/flake-utils";
-  };
-
-  outputs = { self, nixpkgs, rust-overlay, flake-utils, ... }:
-    flake-utils.lib.eachDefaultSystem (system:
-      let
-        overlays = [ (import rust-overlay) ];
-        pkgs = import nixpkgs { inherit system overlays; };
-        myRust = pkgs.rust-bin.stable.latest.default.override {
-          extensions = ["rust-src" "rust-analysis"];
-        };
-      in
-        {
-          devShell = pkgs.mkShell {
-            buildInputs = with pkgs; [
-              nixpkgs-fmt
-              rust-analyzer
-              myRust
-
-              self.packages.${system}.aoc-get
-            ];
-
-            RUST_SRC_PATH = "${pkgs.rust-bin.stable.latest.rust-src}/lib/rustlib/src/rust/library";
-          };
-
-          packages = {
-            aoc-get = pkgs.callPackage ./aoc-get {};
-          };
-        });
-}