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qselleqselle
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Add day 8
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7 files changed

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‎Cargo.lock‎

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‎Cargo.toml‎

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@@ -6,5 +6,6 @@ edition = "2021"
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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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itertools = "0.13.0"
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memoize = "0.4.2"
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regex = "1.11.1"

‎input/2024/day8.txt‎

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...........................A.............W........
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.......x..........AZ......P.........m......k..W...
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....v.....Z..K...V..........A.......R....f........
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.............d..........V.............2...........
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.........Z........d...V.....B....C.....e..........
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............Z.vA...........m...................s.W
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...x..o.....................ek....................
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...O.....VK..................R......B.............
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.........O..................my....kB..............
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.v...................y..........C........B.....z..
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xb.v..................................C..z........
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.........................2.ey.....................
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..K.......................y...................s...
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..........................................z.......
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.......................2.......R........z......F..
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O.....d..................D..k.........F...........
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..........O..........D.............s....E.........
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..o......9....................D........C..s.......
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.....o..r....................c...................m
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.......P..............................e...........
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..............1......................d............
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...................o...............3..............
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........................c.......24..........S.....
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....x..................c.............F4.........S.
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P............N..8.......W.D.......................
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.....K............1.8.............................
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.........P..............Q...M.....................
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9...................R........4...8.....0..........
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....n.........................F...................
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........Y...n......1......................3..J....
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.........................3...8....................
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...n...M............................0.......ja...S
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....f................................6.....S.....E
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....................i.........M...J...............
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...r..........q..........1......l..0.....L........
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.........f7....i.Nc......................j.......l
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..9....Y7......X.........Q...M5....J4...........3.
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.Y........NX..I............Q........L.............
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......Xw...nb.............0..............l6.......
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......b.....f....5..q.....................a..6....
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.......5..........iq.9.....p..........a...........
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........X........I................p...6...........
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..................N.............L.........j.......
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...b.7.......................p....Q......E........
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....Y....7......................p................j
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.......r..........................................
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.................i...................a............
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..w.........5.....................................
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......w........I..............J...................
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.w............r.....................lL............

‎src/day12.rs‎

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// use aoc_runner_derive::{aoc, aoc_generator};
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// #[aoc_generator(day8)]
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// pub fn input_generator(input: &str) -> (Vec<usize>, Vec<usize>) {
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// #[aoc(day8, part1)]
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// pub fn part1(input: &[Equation]) -> usize {
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// #[aoc(day8, part2)]
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// pub fn part2(input: &[Equation]) -> usize {

‎src/day8.rs‎

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@@ -1,10 +1,142 @@
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// use aoc_runner_derive::{aoc, aoc_generator};
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use aoc_runner_derive::{aoc, aoc_generator};
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use std::collections::{HashMap, HashSet};
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// #[aoc_generator(day8)]
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// pub fn input_generator(input: &str) -> (Vec<usize>, Vec<usize>) {
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#[derive(Debug)]
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pub struct City {
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frequencies: HashMap<char, HashSet<(usize, usize)>>,
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y_len: usize,
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x_len: usize,
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}
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// #[aoc(day8, part1)]
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// pub fn part1(input: &[Equation]) -> usize {
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#[aoc_generator(day8)]
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pub fn input_generator(input: &str) -> City {
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let mut frequencies: HashMap<char, HashSet<(usize, usize)>> = HashMap::new();
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let map: Vec<Vec<char>> = input
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.lines()
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.enumerate()
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.map(|(y, l)| {
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l.chars()
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.enumerate()
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.map(|(x, c)| {
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if c != '.' {
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frequencies.entry(c).or_default().insert((y, x));
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}
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c
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})
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.collect()
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})
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.collect();
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City {
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y_len: map.len(),
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x_len: map[0].len(),
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frequencies,
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}
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}
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// #[aoc(day8, part2)]
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// pub fn part2(input: &[Equation]) -> usize {
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#[aoc(day8, part1)]
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pub fn part1(input: &City) -> usize {
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let mut antinodes: HashSet<(usize, usize)> = HashSet::new();
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let mut count = 0;
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for positions in input.frequencies.values() {
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for current_pos in positions {
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for around_pos in positions {
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if current_pos == around_pos {
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continue;
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}
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let y = (current_pos.0 * 2).wrapping_sub(around_pos.0);
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let x = (current_pos.1 * 2).wrapping_sub(around_pos.1);
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if y < input.y_len && x < input.x_len && !antinodes.contains(&(y, x)) {
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count += 1;
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antinodes.insert((y, x));
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}
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}
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}
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}
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count
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}
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#[aoc(day8, part2)]
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pub fn part2(input: &City) -> usize {
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let mut antinodes: HashSet<(usize, usize)> = HashSet::new();
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let mut count = 0;
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for positions in input.frequencies.values() {
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for current_pos in positions {
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for around_pos in positions {
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if current_pos == around_pos {
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continue;
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}
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let delta_y: isize = current_pos.0 as isize - around_pos.0 as isize;
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let delta_x: isize = current_pos.1 as isize - around_pos.1 as isize;
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let mut y: isize = around_pos.0 as isize;
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let mut x: isize = around_pos.1 as isize;
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loop {
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y -= delta_y;
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x -= delta_x;
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if x < 0 || y < 0 || x >= input.x_len as isize || y >= input.y_len as isize {
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break;
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}
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if !antinodes.contains(&(y as usize, x as usize)) {
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count += 1;
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antinodes.insert((y as usize, x as usize));
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}
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}
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y = around_pos.0 as isize;
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x = around_pos.1 as isize;
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loop {
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y = y.wrapping_add(delta_y);
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x = x.wrapping_add(delta_x);
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if x < 0 || y < 0 || x >= input.x_len as isize || y >= input.y_len as isize {
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break;
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}
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if !antinodes.contains(&(y as usize, x as usize)) {
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count += 1;
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antinodes.insert((y as usize, x as usize));
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}
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}
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}
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}
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}
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count
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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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const INPUT: &str = "............
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........0...
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.....0......
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.......0....
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....0.......
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......A.....
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............
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............
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........A...
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.........A..
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............
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............
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";
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// const INPUT: &str = "T.........
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// ...T......
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// .T........
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// ..........
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// ..........
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// ..........
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// ..........
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// ..........
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// ..........
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// ..........";
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#[test]
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fn test_part1() {
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assert_eq!(14, part1(&input_generator(INPUT)))
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}
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#[test]
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fn test_part2() {
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assert_eq!(34, part2(&input_generator(INPUT)))
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}
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}

‎src/day9.rs‎

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// use aoc_runner_derive::{aoc, aoc_generator};
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// #[aoc_generator(day8)]
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// pub fn input_generator(input: &str) -> (Vec<usize>, Vec<usize>) {
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// #[aoc(day8, part1)]
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// pub fn part1(input: &[Equation]) -> usize {
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// #[aoc(day8, part2)]
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// pub fn part2(input: &[Equation]) -> usize {

‎src/lib.rs‎

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@@ -9,5 +9,6 @@ mod day4;
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mod day5;
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mod day6;
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mod day7;
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mod day8;
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aoc_lib! { year = 2024 }

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