From b80637585b2e44b5e36c6c58d47267fbf3b94e06 Mon Sep 17 00:00:00 2001 From: Antoine Martin Date: Thu, 14 Nov 2019 18:19:23 +0100 Subject: [PATCH] 2018: aoc02 part1 --- 2018/aoc02/Cargo.toml | 9 ++ 2018/aoc02/input/input.txt | 250 +++++++++++++++++++++++++++++++++++++ 2018/aoc02/src/main.rs | 44 +++++++ Cargo.lock | 4 + Cargo.toml | 1 + 5 files changed, 308 insertions(+) create mode 100644 2018/aoc02/Cargo.toml create mode 100644 2018/aoc02/input/input.txt create mode 100644 2018/aoc02/src/main.rs diff --git a/2018/aoc02/Cargo.toml b/2018/aoc02/Cargo.toml new file mode 100644 index 0000000..58c8f72 --- /dev/null +++ b/2018/aoc02/Cargo.toml @@ -0,0 +1,9 @@ +[package] +name = "aoc02" +version = "0.1.0" +authors = ["Antoine Martin "] +edition = "2018" + +# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html + +[dependencies] diff --git a/2018/aoc02/input/input.txt b/2018/aoc02/input/input.txt new file mode 100644 index 0000000..1a334bf --- 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+tqyvundgzarflkpcbdewmmnhxi +tzyvunogzarflkpcndewsmjhxb +tkyvunogzxrflkpcbdewfmjhxi +tqyvunogzarflkxcbdzwsmjfxi +kqavunogzarflkycbdewsmjhxi +tqyvunogzarjlkpcbdxwkmjhxi +tqyvinogzarfqkpcbdewsmjpxi diff --git a/2018/aoc02/src/main.rs b/2018/aoc02/src/main.rs new file mode 100644 index 0000000..802f59a --- /dev/null +++ b/2018/aoc02/src/main.rs @@ -0,0 +1,44 @@ +use std::collections::HashMap; +use std::env; +use std::fs; + +type Result = std::result::Result>; + +fn main() -> Result<()> { + let mut args = env::args(); + args.next(); + + let input = fs::read_to_string( + &args + .next() + .expect("Please provide the path to the input file"), + )?; + + part1(&input)?; + + Ok(()) +} + +fn part1(input: &str) -> Result<()> { + let mut twice = 0; + let mut thrice = 0; + + for line in input.lines() { + let mut seen: HashMap = HashMap::new(); + for c in line.chars() { + *seen.entry(c).or_default() += 1; + } + + if seen.values().any(|x| *x == 2) { + twice += 1; + } + + if seen.values().any(|x| *x == 3) { + thrice += 1; + } + } + + println!("{}", twice * thrice); + + Ok(()) +} diff --git a/Cargo.lock b/Cargo.lock index fa1c669..5fc2e56 100644 --- a/Cargo.lock +++ b/Cargo.lock @@ -4,3 +4,7 @@ name = "aoc01" version = "0.1.0" +[[package]] +name = "aoc02" +version = "0.1.0" + diff --git a/Cargo.toml b/Cargo.toml index e583ea6..91cf50d 100644 --- a/Cargo.toml +++ b/Cargo.toml @@ -1,4 +1,5 @@ [workspace] members = [ "2018/aoc01", + "2018/aoc02", ]