53 lines
1.2 KiB
Rust
53 lines
1.2 KiB
Rust
use std::collections::VecDeque;
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use aoc_runner_derive::{aoc, aoc_generator};
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#[aoc_generator(day10)]
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fn parse(input: &str) -> Vec<char> {
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input.chars().collect()
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}
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#[aoc(day10, part1)]
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fn part1(input: &Vec<char>) -> usize {
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solve(input, 40).len()
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}
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fn solve(input: &Vec<char>, runs: usize) -> String {
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let mut saying: VecDeque<char> = input.iter().map(|c| *c).collect();
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let mut next: VecDeque<char> = VecDeque::new();
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for _ in 0..runs {
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while let Some(current) = saying.pop_front() {
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let mut count = 1;
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while saying.front() == Some(¤t) {
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count += 1;
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saying.pop_front();
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}
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let s = format!("{count}{current}");
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for c in s.chars() {
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next.push_back(c);
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}
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}
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saying = next;
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next = VecDeque::new();
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}
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saying.into_iter().collect()
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}
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#[aoc(day10, part2)]
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fn part2(input: &[char]) -> String {
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todo!()
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}
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#[cfg(test)]
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mod tests {
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use super::*;
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#[test]
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fn part1_example() {
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assert_eq!(solve(&parse("111221"), 1), "312211");
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}
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// #[test]
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// fn part2_example() {
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// assert_eq!(part2(&parse("<EXAMPLE>")), "<RESULT>");
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// }
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} |