2022: day 01 part 1

Cargo.lock

@@ -100,6 +100,22 @@ dependencies = [
  "criterion",
 ]
 
+[[package]]
+name = "aoc2022"
+version = "0.1.0"
+dependencies = [
+ "anyhow",
+ "aoc",
+]
+
+[[package]]
+name = "aoc2022_bench"
+version = "0.1.0"
+dependencies = [
+ "aoc2022",
+ "criterion",
+]
+
 [[package]]
 name = "atty"
 version = "0.2.14"

Cargo.toml

@@ -1,7 +1,7 @@
 [workspace]
 members = ["aoc20*", "aoc20*/aoc20*_bench"]
 
-default-members = ["aoc2021"]
+default-members = ["aoc2022"]
 
 [profile.release]
 debug = true

aoc2022/Cargo.toml

@@ -0,0 +1,18 @@
+[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"
+
+[lib]
+path = "src/lib.rs"
+
+[[bin]]
+name = "aoc2022"
+path = "src/main.rs"

aoc2022/aoc2022_bench/Cargo.toml

@@ -0,0 +1,17 @@
+[package]
+name = "aoc2022_bench"
+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]
+aoc2022 = { path = "../" }
+
+[dev-dependencies]
+criterion = "0.3"
+
+[[bench]]
+name = "aoc2022_bench"
+harness = false

aoc2022/aoc2022_bench/benches/aoc2022_bench.rs

@@ -0,0 +1,14 @@
+use criterion::{criterion_group, criterion_main, Criterion};
+
+use aoc2022::day01;
+
+fn aoc2022_all(c: &mut Criterion) {
+    c.bench_function("day01", |b| b.iter(|| day01::run().unwrap()));
+}
+
+criterion_group! {
+    name = all_days;
+    config = Criterion::default().sample_size(200);
+    targets = aoc2022_all
+}
+criterion_main!(all_days);

aoc2022/input/day01_provided.txt

@@ -0,0 +1,14 @@
+1000
+2000
+3000
+
+4000
+
+5000
+6000
+
+7000
+8000
+9000
+
+10000

aoc2022/src/day01.rs

@@ -0,0 +1,63 @@
+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)?)?;
+
+    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")
+}
+
+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);
+    }
+}

aoc2022/src/lib.rs

@@ -0,0 +1,3 @@
+#![warn(clippy::explicit_iter_loop, clippy::redundant_closure_for_method_calls)]
+
+pub mod day01;

aoc2022/src/main.rs

@@ -0,0 +1,11 @@
+use anyhow::Result;
+
+use aoc::DayFunc;
+
+use aoc2022::day01;
+
+fn main() -> Result<()> {
+    let days: &[DayFunc] = &[day01::run];
+
+    aoc::run(days)
+}

flake.lock

@@ -32,16 +32,16 @@
     },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1637593665,
-        "narHash": "sha256-R7jKS7A+0tZS8qD5pBr1UFcMiTdsw5bfoxgXbYsoWhM=",
+        "lastModified": 1669834992,
+        "narHash": "sha256-YnhZGHgb4C3Q7DSGisO/stc50jFb9F/MzHeKS4giotg=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "98747f27ecfee70c8c97b195cbb94df80a074dda",
+        "rev": "596a8e828c5dfa504f91918d0fa4152db3ab5502",
         "type": "github"
       },
       "original": {
         "owner": "NixOS",
-        "ref": "nixpkgs-unstable",
+        "ref": "nixos-22.11",
         "repo": "nixpkgs",
         "type": "github"
       }

flake.nix

@@ -1,6 +1,6 @@
 {
   inputs = {
-    nixpkgs.url = "github:NixOS/nixpkgs/nixpkgs-unstable";
+    nixpkgs.url = "github:NixOS/nixpkgs/nixos-22.11";
     rust-overlay.url = "github:oxalica/rust-overlay";
     flake-utils.url = "github:numtide/flake-utils";
   };