diff --git a/input/day14.txt b/input/day14.txt new file mode 100644 index 0000000..ae164f1 --- /dev/null +++ b/input/day14.txt @@ -0,0 +1,100 @@ +..#..#..#.#OO.O#...#O..O..O#.###.O...##..OO...#.O#..##......OO.#O.O.#.O..#...#OO..OO..O.O..#.OO...## +.#.#..#.OO.O...O###OO.O.OO......O.OO#....O#....##O.O..O....##...O...O#..O###O...OO#......O#.#...O..O +..O..#OOO##.....O...#O..#.#.O##......O.##.OO..O...O...OO.O.#.##.OOO...OO....#..#...........#.....#.. +.......O....O#........O.O#..#....#..O.O.........#O.OO.OOO..........O#OO..#.......O#OO#O.....O....O.. +##..O##.#.#.#.##...O.O..#.#O....#......#..O.#..#.O..#.......O......O..###OOO...#.....#...#....OO...O +..#.#....O...O.....#..............O.O.....OO.#OO.#..#.O...O..#.##.#.#O.O#O.....#O..#..O.#....O.#O.O. +.#..O....O...#O...#...###...#O......#O..#......O.....O...O...O..#..#..#.O.O....O....O##.#O.#...#O#OO +O..O.....#OOO.OO.O#.O..O.....O..O.O##..O...##...#.#.....O...#.O..#.O.##.#...#..###......#..O..###..O +#.....#.O#..#.#O....#O..#..OO..#OOO..#......O#..O#..O.#..#.O...O.OO...O#.O.O.#.......#O...#..#...... +....#..........O.#....#..#..OO.O...##......O.#.#.O...O.#.OO#O.OO...O.#.#OO.....O#.#....#..O.#O#..OO. +#..#..#....O....#.#..O...##..O#.O..O#........O.#O....OO.#OO#..........O.OO.......##O.O..O....O.OOO.. +OO#....OOO##O..........O.O.O.O#.....#........OO..OO...#.......#O.....#O..#....#.#...O...O.....OOO#.O +...O......#...O#O..#O.O...O.O.#.....O......O....#O...O.....#......#O.O...#.............#O..#O....... +..#..#..O.#..#O..#.OO#.O#.O..#.#..#.O..#..O....OOO.#.OO.O##..#.#.#.##..##OO##.#.O.O.#O..#..#.OO.O#.. +..#O#.#....O..OO.#O..OOOO.O#OO#...#O.O..O#...#....O#.#..#..#.#...#....#.....##..O.O....O#....#...... +...O.O.O#.O.#.......O..........O.O##..O##O#.#..#O.O..#O#...O.#.#....O.O....OOO.OO...#.OO..#.O##O..## +.O...OO.#......OO..#.##....##...O#.#..OO....#..#.#......O.O..O........OO.O.O..OO.O.O.#..O..#O..O.... +........O.O.OOOO#.#..O.........O...O....O..#.#O...#.#O...O...O.##.O....##..#.....O.##....OO.#O...... +.O...#O..#.........OO....###.O#....###..O.....O..##O...#OO..O...O.O..O.O.O.O#OO.OOO...O#.#O.....O... +OO..OO.#......O..##.........O..OO#..OO......#.......#.#..O#.###..O.O...##O.....OOO.O#OO...#.#O...O.. +#...#O.......O.OO.O.........O....O.O.O#.....O...O...O.#.O....#..##.#.O....O#..O...OOOO.#.#OO.#..#O.. +O.#.O..O...O#.....#.O.O#........OO..#.O...........#.........O.OO.#.O.#.#.....O#..O.O.O###.#.O.....#. +.......##O#..#.#.OO.O#O##.#....OO#O#..##O#...O.#O..O.#.##......O.....O..O.OOO..........O.O...O..#.O. +.......O..O.....#OO....O.#........O......O.......OO..##.O.....O...#.....O.O..O..O...O....O...#..O..O +.OO..O........#..O.OO#.O.O..O..#.........O.....O.....#..O..#.......#..#.O...OO.##.#.O..#.#..#..#..#O +..O..#.#.O...O#O..O..O.#O#O..##...#O..O.O.OO..OO......O...O..O#O...O.............O......##..OO..#... +..O.##O##....#..O..#OO.#O...#.#..........#.O..#..#....#...O......O..##O.....O..##.OO...#....O..#.O.. +O.#........###.......#..#.O..O...#.....O#.##.#.O..........O...OO..O...O.#.#..O..#....O..OO...#O##... +.......O.#OO..#.O##.....#.O.O..O....##OOOO...#.OOOO.O.#.O.OO..#O#.O..O.#..O......#.....O.....#.#.O.. +O#..#.O.......#....#..#....O.....O....#OO.O.....#O..#.OO...O.O...O...##....OO#...#.......O.....O.... +...#.O.#O..O#.O..#...#O#..#.....OO#..##O.O...O.O..O.O....#...OO.###OOO..#.#..##OO#.#.#...O.OO.O...#. +#......#.O..........#OO#.#.O.#.O...O.#..O..#.#..OO......#..O..OOOO..#O...O...O.OO...........#...O..# +O..O....#OO.#.#.O#O##.O#..##...OO##.#....##O.....O.O....O...O..#O#....#..O...O#.O.O.O..O.........#.O +.O.O..............O..O...O...#..#...O...O.O....##.#.O...O.#O..........O#.O..O.##....#.......#..O##.O +...O.OO...O#...OO.#OO..#..#...O#.......O#.....O#..#.O..#..#.OO#...O..O.O..###....O..#.O.O......##.O# +.#.#..#O....OOO..#.OOO..#..O.O.#....#......#..#OO.O....O...O.....O#.O..O..OO.O...O#..O#.#...O#..#..O +.O.#.O.#..#.O.#O......O..#..OO..O.O#.#.O...#.O#O.#O.#.##...#.O.....O##....#.##....#..#O.#O.O..O..OO. +##.........O...O...O#O..#..#..OO......OO..O...#..O..#O.#..OO.......##...O....OO..#.O.OOO..........O. +..O..OO.O..O.#OO##.O...OO#.#..#.#O.#.#..#......O#O...#.O....O.#O#...##.......OO.......O...O.#.#...#. +O.O..#.......O#O...#.O.#OO...#O......#..O.O.....O...#O....#....O#....OO..O#OO.O......#.#..#OO...#..O +....##..O.O#OO.....#..........O..OO.#O...#..O#..O.#O....OO#O.###...#.......O..#.O.....O...O.....O... +...#.O.O.#O...#...................#..O..OO..OO.#...#..#.#OO....O.O#.O...#..#O.....OO..#OOO.#..#.O... +....OO...O...#O.O..O#O.O.#.....OOO.#O..O...#....O.....O#....O...#OO#.##O#.O..OO......O#.OO.O#....O.O +.#...#O....O.#...#.O##...........#..............O..#.#...#..#....O...#....O............O.......#O... +O......O....#O#......O.#.##O#O..#.......#.......O....#O..O.....#OOOO.O#OO.O..O.......O#....O..O..... +.O.....O#.......O#O.O#......O....O.O##....O..OO.#..O#.##........#..#.......##...O..O#..O.OO.OO..O.OO +......#..OO...##.#..###O.........O.....O..#.#.##O..O.#.OO#O#.#.#.#O.#O....O.#..##.#.#....O....O..... +O#..O.....#..O#O.#O.O.#........#..O......#.O.O.OO..O#........OOO....O#O..O.O#O#.####.O#.O.....#O.O.. +#.O....O#..#.O...O......O.......O.#.....O....O......#.O....#.##O.OO.O..#..#.O..#..#.O#..O....O#....# +#OO..#...#.#..........OOO.#.#O.....#..#..##O.O#O#.O#.#..#...O....#..#O..##...##.O.O#.O...#O.O..OO.O# +OO#.....#.OO#O.#O#..#.#OOO.#..##....#.#.#.O#..#....#..........OOO...#.O...#O#......O.#....#.#.##.O.O +#..##OOO..OO.O.#...O#.....O......O..#....O.#.#......O#O....OO#..O.OO.#...#.#O..O###.O.##.#.##.#O.#.. +.O..#...#.O.......O...O..O.....O..O.....#.O.#O...O#......#.....#...#..#.O#.O......O#...#....O.##.#.. +O..O#.O#...###.....O.O.#..O.........O..O.O#..#.O..#O.O#..###.#.#..O.O..OO.#..O.....OOO.O.......#...O +....O##......#.........#.#O....O....O..O.......O#O..O..#.#..........O.O..#.OO.O#.#.#....O###.#O....# +.#.O.......#.#....O..O.........#O..O.OO.....#.OO.O..#.O..#.#O.#O....#....O.##O.#.O....O.O..O#.#O.##. +..OO.##.#.....OO#.#O.#.O...#..#...O..#......#..#O.#.O#OO.....#...O.O..O#O.O.#..##...O....#......O.#. +....OO.#OOOO#....#..#...#.....O.#.#.........#.O.#.O..O#..O..........O.#.OO.#....##OO..O.O....#.O#... +.......O.#.O.#OO#O..#.#...O..#...OO...OO..........#...O...............#O..####....#..##..##O........ +.......O...OO..#...O.O.#.O..O.O..O..O##O.O.........#.O.O...O.#....#.....##OO....#..#.#OOO........... +...O..O...O#....O#...#.OO......OO.OO.....O...O...#.O..#..OO.O...O.......O..O#O...O..#O.#OOOOO..O.... +....O..O.O.OO..O#...O.#.#....#....##O##.#..OOO...#.........OOO..O#..OO.....#...O.......####.#O.#..#. +#O.#..#......O......O#........O.#.OO..#............#....#O..O....#..OO...OO#O.O..O.O#...O.OO....#... +...#..##O.......##..#.O....####OO.#OO#.#.O..O..O.O...O.O.....O...#..##.O........#....#O#.#.OOO.#...# +..##OO..O.#.#OO##....O.........#........#.O....O.##...OO.#.O......O..O..#....#O.#...#O.OO...O....... +#.O.#O...........#OO#...#...O#..OO.O...O..#.O#OOOO.O......OO.....O..#................#.#OO....O.OO.# +..O..#....OOOO..O##OO#.O..#O..O..#...OOO....OO.#.....#.O.#.O..O...OO........O.O...#OO...O..O....OO#O +#.....#....#..O#.###..#OO..O.#.O#O..#.O....O#O...#O..#....###.O...#.#.##OO...O.#....#.O..#..O.#....O +......O.#..#...O..O....O.OO.##....OO.O...O.O..O#..#....O..O.....#..O....#.....#...O................. +..#O......O.O...#...#..O.O.#OO.....O.O...OO....O...#..OO.#....O.....OO....O..OO#..O...#....O.OO#.#O. +.O#O.##....O.#.....O..#.#..#.O#O..O...O..#....#O.##OOO...O##..#..#.O#..O#.....O#....#OO.#..O.#OO.... +.O#...#.....#.....##..OO........###....O...O......#.O#.#.#.....#..O..#O.O.#O....#.O.OOO....O#O...O#. +.OO.#..O..O#O.OO...#........O.OOO..#O#.OOO#.#O...OO#O.#....O#..O.......O.O...O..###O.#O##.....#.#O.. +#O...##.O#...O.#.O.O#O.....#.......O.#O....#O......#...OOO...O.#.#..OO..O##..#..O.O##...O...#O..OO.O +..##.........O.O..#.O#O#.#....OO#O.#.#.O.O...OO..#.#.OO..O..O#...##....O..O....#......O..OOOO.O..... +...O.O..O......O............O...#.#..#.#...O#O.#....O.#..O...#.#.OO#O...#.O.....#O...#.....OO.##...# +..O#.#.O..O..#O..#OO.#..#.O....#O#O#O..#O#O...OO.#.##...#...OO.....##..#...O....##...O..#.O..#...... +....#..O#.....#O.........#O..#....#.O.#.....#.O..#..OO......O.OOO.O...O##..O.#.......O.O.#.......O.. +....O.O#...O....O.O.##..O......O..#....O......#.....#.##O.#.O..OO..#...O..#..O.##OOO..O.......#..#OO +...O.....#O......##...OO#...O.#.#O..#..#.#O..#.O...#.#..O#..#O....#.O#O#.......OO.##.......O..##.... +.#...OO.O......#O.O#.O.O...O#O.O#O..O.O.O..#O.O...........##.O....OO.O.O..O.O.O.O..OO...#..O.O...... +....#.##.O.OO.O#..#.O.....O.O....O..O..........#O....#..OO.OO....OO..O.O..OO...O.OO#..O....#O...O#.. +..#O.O#O.O...O....OO.#..O...#.O..#..#..O...O.O.O....##...O.#..OO###..O.O.#..#O#..O#.O.O#..#....O..OO +#..O.#..O.#.O...#.#.OOO.....O...O#..#O#.#...O.##.O#.#.OOO....##.#.#..#..#..##...#..OO.....##...#.... +O##...O....O##....#.O#..#O#.OO......#OOO...O.OO....O...#O.##....OO..O.O#O.#..O#.O...O#.........#.O.. +.#O.O.##OO.....O.O##....OO#.O......##.O.O#O.....O.....OOO#.......##.##....#O..OO..O......#.........O +#...OOO.#....#.O.O.OO....OO..O.....O..#.O.......###......O...O.O...OO.#.....#OOO..#......O#.#..#.O.# +.OO...O#.O#.#.#...OO.O#...##.O..OO.....O.O.##..#......OO.###.#.....OO....O...O..#.......O..#.O...... +.....O..O.#.#..O......O.O....#O#.O...#.O...##O#........O#O.O#.O...#O#O.O..O..O..#.....#.....#....... +..#O.O.##.OO#OOO..O.O#..OO.....#..O...#..#OOO#..O.O####OO..#.O....#O#.O.#....#.OO.OO.O.#....O.O#.#.. +...#....O.O..##..O......#OO.##OO.O...O...O...O..OO.O.OOOO.#...OO..O..#OO..........#O......#...#..O.. +##O.#...O......#..##....OO....#......#..#...O.....#...O##.O....O...#O.O#O..#O.........##O.#......O.. +.#....#.....O#..O..O...#OO.#...O.#..O..O.....#...#.OO.....O......O...OO...O#......#...#O..##.##.O.O# +##OO.O..OO##O.O.O.#.#...#....OO.........O...O....#.#.#..#............#O.....OO.#..O.....#..O...O.... +...#OO.#.O...OO.O....###..#...OO..#.#..O.O.O....OO..#O..#.###..#O..#.O.....#OO.OO..###O..##.OOO..... +O.O.#....###....#..##...O..O....O.OO.#OO.....O.###....O.#.....O...O..##..#O#O.O...OO#....O.#........ +OO..O....O#.#.O.....#......#.O#O.##.O.#....O.#O.OO..O........O#.....OO.#...O....O..O#...........#O#. +.#....#O....OO.O##....O.O.O..OO....#O...OO..#...#.#.......O###..O.#O#...#...O.#OO.........O..O...O.O +#OOO#.O#.O#.#.O...#.........#.O....#O#.#O..O#...#.O..###..O.O#...##...O.O#.......O#OO#OO.O...O...##. +.....O.OO#.#..O.#.O.O#....##O.#....#O..#.......O#.#O##...O.#.#...O#...O#...O.O#........#.OO#..O..... diff --git a/src/day14.rs b/src/day14.rs new file mode 100644 index 0000000..0f8d8b9 --- /dev/null +++ b/src/day14.rs @@ -0,0 +1,506 @@ +use std::{fmt::Debug, thread::current}; + +pub fn run() { + let input = include_str!("../input/day14.txt"); + // let input = r#" + // O....#.... + // O.OO#....# + // .....##... + // OO.#O....O + // .O.....O#. + // O.#..O.#.# + // ..O..#O..O + // .......O.. + // #....###.. + // #OO..#.... + // "#; + let mut m: Map = input.into(); + m.tilt_north(); + dbg!(m.load(Direction::North)); + + m = input.into(); + dbg!(part2(&mut m)); +} + +fn part2(map: &mut Map) -> usize { + // the problem says 1b cycles, but the output gets into a loop pretty quickly + // do 1k iterations and then figure out the period of the loop + let mut v = vec![]; + for _ in 0..1_000 { + map.tilt_north(); + map.tilt_west(); + map.tilt_south(); + map.tilt_east(); + v.push(map.load(Direction::North)); + } + + dbg!(&v[0..15]); + + let mut r = None; + for i in 0..990 { + let start = v.iter().skip(i).take(10); + if let Some(j) = (i + 1..990) + .filter(|j| v.iter().skip(*j).take(10).eq(start.clone())) + .next() + { + r = Some((i, j - i)); + break; + } + } + + let (period_start, period_length) = dbg!(r.unwrap()); + + let repeating = &v[period_start..(period_start + period_length)]; + repeating[(1_000_000_000 - period_start - 1) % period_length] +} + +#[derive(Clone, PartialEq, Eq)] +struct Map { + tiles: Vec>, + width: usize, + height: usize, +} + +#[derive(Debug, Clone, Copy, PartialEq, Eq)] +enum Tile { + Empty, + Round, + Cube, +} + +impl From<&str> for Map { + fn from(value: &str) -> Self { + let tiles = value + .trim() + .lines() + .map(|l| { + l.trim() + .chars() + .map(|c| match c { + '.' => Tile::Empty, + 'O' => Tile::Round, + '#' => Tile::Cube, + _ => panic!("invalid char {:?}", c), + }) + .collect::>() + }) + .collect::>(); + let width = tiles[0].len(); + let height = tiles.len(); + Self { + tiles, + width, + height, + } + } +} + +impl Debug for Map { + fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result { + write!(f, "Map(")?; + for row in self.tiles.iter() { + write!(f, "\n")?; + for tile in row.iter() { + write!( + f, + "{}", + match tile { + Tile::Empty => '.', + Tile::Round => 'O', + Tile::Cube => '#', + } + )?; + } + } + write!(f, ")") + } +} + +enum Direction { + North, + South, + West, + East, +} + +impl Direction { + fn offset(&self) -> (i32, i32) { + match self { + Self::North => (0, -1), + Self::South => (0, 1), + Self::West => (-1, 0), + Self::East => (1, 0), + } + } + + fn vertical(&self) -> bool { + match self { + Self::North | Self::South => true, + _ => false, + } + } +} + +impl Map { + fn tilt_north(&mut self) { + for col in 0..self.width { + let mut last_stop = -1i32; + let mut current_round = 0; + + let finish_run = + |tiles: &mut Vec>, current_round: i32, last_stop: i32, row: usize| { + if current_round == 0 { + return; + } + for i in 0..current_round { + tiles[(last_stop + 1 + i) as usize][col] = Tile::Round; + } + for i in (last_stop + 1 + current_round) as usize..row { + tiles[i][col] = Tile::Empty; + } + }; + + for row in 0..self.height { + match self.tiles[row][col] { + Tile::Empty => (), + Tile::Round => current_round += 1, + Tile::Cube => { + finish_run(&mut self.tiles, current_round, last_stop, row); + last_stop = row as i32; + current_round = 0; + } + } + } + finish_run(&mut self.tiles, current_round, last_stop, self.height); + } + } + + fn tilt_south(&mut self) { + for col in 0..self.width { + let mut last_stop = self.height as i32; + let mut current_round = 0; + + let finish_run = + |tiles: &mut Vec>, current_round: i32, last_stop: i32, row: i32| { + if current_round == 0 { + return; + } + for i in 0..current_round { + tiles[(last_stop - 1 - i) as usize][col] = Tile::Round; + } + for i in (row + 1)..=(last_stop - 1 - current_round) { + tiles[i as usize][col] = Tile::Empty; + } + }; + + for row in (0..self.height).rev() { + match self.tiles[row][col] { + Tile::Empty => (), + Tile::Round => current_round += 1, + Tile::Cube => { + finish_run(&mut self.tiles, current_round, last_stop, row as i32); + last_stop = row as i32; + current_round = 0; + } + } + } + finish_run(&mut self.tiles, current_round, last_stop, -1); + } + } + + fn tilt_west(&mut self) { + for row in 0..self.height { + let mut last_stop = -1i32; + let mut current_round = 0; + + let finish_run = + |tiles: &mut Vec>, current_round: i32, last_stop: i32, col: usize| { + if current_round == 0 { + return; + } + for i in 0..current_round { + tiles[row][(last_stop + 1 + i) as usize] = Tile::Round; + } + for i in (last_stop + 1 + current_round) as usize..col { + tiles[row][i] = Tile::Empty; + } + }; + + for col in 0..self.width { + match self.tiles[row][col] { + Tile::Empty => (), + Tile::Round => current_round += 1, + Tile::Cube => { + finish_run(&mut self.tiles, current_round, last_stop, col); + last_stop = col as i32; + current_round = 0; + } + } + } + finish_run(&mut self.tiles, current_round, last_stop, self.width); + } + } + + fn tilt_east(&mut self) { + for row in 0..self.height { + let mut last_stop = self.width as i32; + let mut current_round = 0; + + let finish_run = + |tiles: &mut Vec>, current_round: i32, last_stop: i32, col: i32| { + if current_round == 0 { + return; + } + for i in 0..current_round { + tiles[row][(last_stop - 1 - i) as usize] = Tile::Round; + } + for i in (col + 1)..=(last_stop - 1 - current_round) { + tiles[row][i as usize] = Tile::Empty; + } + }; + + for col in (0..self.width).rev() { + match self.tiles[row][col] { + Tile::Empty => (), + Tile::Round => current_round += 1, + Tile::Cube => { + finish_run(&mut self.tiles, current_round, last_stop, col as i32); + last_stop = col as i32; + current_round = 0; + } + } + } + finish_run(&mut self.tiles, current_round, last_stop, -1); + } + } + + fn move_run( + &mut self, + round_count: i32, + last_stop: i32, + dir: Direction, + run_end_index: i32, + dir_axis_index: usize, + ) { + if round_count == 0 { + return; + } + + let (dx, dy) = dir.offset(); + let sign = -1 * (if dx != 0 { dx } else { dy }); + + let run_start = last_stop + sign * 1; + let round_end = last_stop + sign * (1 + round_count); + + for i in run_start.min(round_end)..round_end.max(run_start) { + if dir.vertical() { + self.tiles[i as usize][dir_axis_index] = Tile::Round; + } else { + self.tiles[dir_axis_index][i as usize] = Tile::Round; + } + } + for i in round_end.min(run_end_index)..run_end_index.max(round_end) { + if dir.vertical() { + self.tiles[i as usize][dir_axis_index] = Tile::Empty; + } else { + self.tiles[dir_axis_index][i as usize] = Tile::Empty; + } + } + } + + fn load(&self, dir: Direction) -> usize { + let (dx, dy) = dir.offset(); + let dir_axis_count = if dir.vertical() { + self.height + } else { + self.width + }; + let perpendicular_axis_count = if dir.vertical() { + self.width + } else { + self.height + }; + + let mut total = 0; + for i in 0..dir_axis_count { + let factor = if dx == -1 || dy == -1 { + dir_axis_count - i + } else { + i + 1 + }; + + let mut count = 0; + for j in 0..perpendicular_axis_count { + let tile = if dir.vertical() { + self.tiles[i][j] + } else { + self.tiles[j][i] + }; + if tile == Tile::Round { + count += 1; + } + } + + total += factor * count; + } + total + } +} + +#[cfg(test)] +mod tests { + use super::*; + + #[test] + fn tilt_north() { + let mut m: Map = r#" +O....#.... +O.OO#....# +.....##... +OO.#O....O +.O.....O#. +O.#..O.#.# +..O..#O..O +.......O.. +#....###.. +#OO..#.... + "# + .into(); + m.tilt_north(); + assert_eq!( + m, + r#" +OOOO.#.O.. +OO..#....# +OO..O##..O +O..#.OO... +........#. +..#....#.# +..O..#.O.O +..O....... +#....###.. +#....#...."# + .into() + ); + } + + #[test] + fn tilt_south() { + let mut m: Map = r#" +O....#.... +O.OO#....# +.....##... +OO.#O....O +.O.....O#. +O.#..O.#.# +..O..#O..O +.......O.. +#....###.. +#OO..#.... + "# + .into(); + m.tilt_south(); + assert_eq!( + m, + r#" +.....#.... +....#....# +...O.##... +...#...... +O.O....O#O +O.#..O.#.# +O....#.... +OO....OO.. +#OO..###.. +#OO.O#...O +"# + .into() + ); + } + + #[test] + fn tilt_west() { + let mut m: Map = r#" +O....#.... +O.OO#....# +.....##... +OO.#O....O +.O.....O#. +O.#..O.#.# +..O..#O..O +.......O.. +#....###.. +#OO..#.... + "# + .into(); + m.tilt_west(); + assert_eq!( + m, + r#" +O....#.... +OOO.#....# +.....##... +OO.#OO.... +OO......#. +O.#O...#.# +O....#OO.. +O......... +#....###.. +#OO..#.... +"# + .into() + ); + } + + #[test] + fn tilt_east() { + let mut m: Map = r#" +O....#.... +O.OO#....# +.....##... +OO.#O....O +.O.....O#. +O.#..O.#.# +..O..#O..O +.......O.. +#....###.. +#OO..#.... + "# + .into(); + m.tilt_east(); + assert_eq!( + m, + r#" +....O#.... +.OOO#....# +.....##... +.OO#....OO +......OO#. +.O#...O#.# +....O#..OO +.........O +#....###.. +#..OO#.... +"# + .into() + ); + } + + #[test] + fn load_north() { + let m: Map = r#" +OOOO.#.O.. +OO..#....# +OO..O##..O +O..#.OO... +........#. +..#....#.# +..O..#.O.O +..O....... +#....###.. +#....#.... +"# + .into(); + assert_eq!(m.load(Direction::North), 136); + } +} diff --git a/src/main.rs b/src/main.rs index cb35461..1f4fd1d 100644 --- a/src/main.rs +++ b/src/main.rs @@ -14,7 +14,8 @@ mod day10; mod day11; mod day12; mod day13; +mod day14; fn main() { - day13::run(); + day14::run(); }