Start AoC.
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2
2022-aoc/.gitignore
vendored
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2022-aoc/.gitignore
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/target
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/input
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10
2022-aoc/Cargo.toml
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2022-aoc/Cargo.toml
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[package]
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name = "aoc"
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version = "0.1.0"
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edition = "2021"
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# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
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[dependencies]
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aoc-runner = "0.3.0"
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aoc-runner-derive = "0.3.0"
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40
2022-aoc/src/d1.rs
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2022-aoc/src/d1.rs
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use aoc_runner_derive::{aoc as aoc_run, aoc_generator};
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#[aoc_generator(day1)]
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fn parse_input_day1(input: &str) -> Vec<i32> {
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let mut cur = 0;
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let mut out = Vec::new();
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for line in input.lines() {
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if let Ok(n) = line.parse::<i32>() {
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cur += n;
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} else {
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out.push(cur);
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cur = 0;
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}
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}
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out
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}
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#[aoc_run(day1, part1)]
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fn part1(calories: &[i32]) -> i32 {
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unsafe { *calories.iter().max().unwrap_unchecked() }
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}
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#[aoc_run(day1, part2)]
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fn p2(cals: &[i32]) -> i32 {
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let mut cals = std::collections::BinaryHeap::from_iter(cals.iter().copied());
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let mut out = 0;
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for _ in 0..3 {
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out += cals.pop().unwrap();
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}
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out
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}
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// much slower than using a heap
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#[aoc_run(day1, part2, alt)]
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fn p2a(cals: &[i32]) -> i32 {
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let mut cals = cals.to_owned();
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cals.sort_unstable_by(|x, y| y.cmp(x));
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cals.iter().take(3).sum()
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}
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5
2022-aoc/src/lib.rs
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2022-aoc/src/lib.rs
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use aoc_runner_derive::aoc_lib;
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mod d1;
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aoc_lib! { year = 2022 }
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3
2022-aoc/src/main.rs
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3
2022-aoc/src/main.rs
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use aoc_runner_derive::aoc_main;
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aoc_main! { lib = aoc }
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