day 14
This commit is contained in:
Moritz Hölting
parent
16987a4bf8
commit
d93dc91117
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@ -159,6 +159,13 @@ dependencies = [
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"rayon",
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]
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[[package]]
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name = "day-14"
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version = "0.0.0"
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dependencies = [
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"indoc",
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]
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[[package]]
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name = "deprecate-until"
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version = "0.1.1"
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@ -0,0 +1,7 @@
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[package]
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name = "day-14"
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version = "0.0.0"
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edition = "2021"
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[dev-dependencies]
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indoc.workspace = true
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@ -0,0 +1,100 @@
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O.O#..O.#...#..O.O#..O#...O..O.#...O#.OO.O...#....#.O.##..####.OOO....OO......##..........#O.#O.O.#.
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..O.#..#O...#..#.....O..O..OO..#.O..O#..#O#...#......O.O.O......#..OO##...O..#.O.O..#...#O....O.OO..
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....O#O#.O#...#..O.O#..#.....O....#.....OOO#OO.#....#...#.O.OOOO..#O.O##....##..O.....##.OOO.#..##..
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OO...OO...#..OOO..#....O.#.......##O....#..O.O#..#.O.#..O.#O.#.#..#....#...O.......O#O.....OOO###...
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..#...#...O.O....#..O.....#...OO.##O...#O...#.#.O#O.OO.OO.O...#O#...#.#...#.....O..#..O##.##.OO..#.O
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..#.#.O.#OO#...#.#O##O.OO..#......#OO....O........#OO#..O.O.....#.....O.O..O.#O#..O......O....O.##.#
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.....O..O......O...#.#.#.....#OOO##O.#O...O...O.O..#...#O##.OO......O......OO..O#..##......#OO#..O..
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...#...O.#O.......#.O....#..#.....#.O.#.....#..O..#.....O#..O#.O.O......O###O#..O...OO..##........##
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.......#O..O..O........#...#....O..#...#.....#.....#.#O.#.O...O#.....OO.O........#O#O.O..#.....O#O..
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OOO....OO..#O.O#....O#O....OO...O.O...O..O.#..O#........OO....#...#.....OO..O#....##OO#.O#O........O
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#.#......O..O...O###O.OO..##......#........O........O......O..O..O.....O.##.O...O..O..OO.O##O.O..#O.
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...O.............#.OO.O#.#.....O.O#..OO#.............O..OO.#.O.#O#.O....#..#........O.#.O.......O#..
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.............OO#.....O.O..O..O...O.O..#..#.#..O....OO#..OO..#.O..O#.....#.#....O.O...#.#O....#...O.#
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..O..#O.#.#OOO.....#O..OO.##....O..##.O.....O....O..#.#...O.O..O##...O...O..#..O.#O.##.......O...#..
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...O#.....O#O...O....OOO...#.#....##O.....OOO.##...OO.........#.#.#..O....#O#.OO.O........O.........
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.......#........#....OO........O...OO.##...O.#.....#....O..OO.O.#...OO..O...O..O....O.#....#.......#
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..#....#...##O..#....O#..O.O....#....#..###.#.O.....###..OO....#...OO.OOO#O...##...O.#O#...O...O.O..
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O#..O#...OO..#.......#....OOO...OO.O...OO...##.O..O##.O......#....#O.O..O#OOO.#.O#O.......OO...OO...
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OO.#.#...#..O.#.#.OO..OO.#O.#..O....OOO.#.....O.OO....O.#.#..##.....O.#...O......#OO#..O.O..#.....#.
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O.....O..O..........O....O..#..#...........#.#O.......#....O.#..##....#O#...#O.O...O#O..#O#..OO.#.O.
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.#.##....O.#...OO##O.#..O..OO........O...O......O#OO..OO.O...#..#.O#O.......O#...O.O#..#OOO.O...OO#.
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..O..#OO#O#.O..O..#......#.O..#...O..O..O...##O.O..##.....#O.O.OOO.O..O...O...O..O..O....#......#OO.
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...OOOO.#.#.O.OO#......#.#.O..O.#...O..O..#......#....##O.#.O.#O#O....###.#..#.....O#.O........O....
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..OO#.........OOO..........O...O..###...##...O........#....O.O#O....#...............#...O..O.O...#..
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.O......#O.OO.....O..#........O#OO.....O....O.O#.O.O...O....#..O#O....#.....O...O#O.O..#.OO..##.#.#.
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....O.O#..#...O#.O.O.#......OO..O#..#..#..##...O.#..###.O#.O..O#....O.#..O.O#..##O#....#O.OO#.#.....
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O##..#.....##...O......#..O....#O..#O...O.........O..OO......#.#OO##...#.....#......O.....O#..O..#..
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.##.O#O#O...O..#...........#OO....O.#.O.O.#.#O.#..#...O........O...#...#..OOO..##..O......O##O#.....
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...O...O#.....#O..#..#..O.#.##O..........#.O..###.O..O#O....O...O#O....OO.O..#.#.O#O#.....#.#.O.OO#O
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...O..#O.#O......O....O...O..O#......OO...#..O.OO.O.#..#..#......OOO..#.....OO....O..#.#O......O....
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.....#...##.....O#..O.....#O.#..OO..#.#..##....#.O.#......#.#O.O..O.O.......O......O#.O#O#...OO...#.
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......##.O#....O#.....O......#OO#...O....O#....#....O...#..#.#....OO...##OO..#.....##..O..O.O...O..O
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OO##..#...OO.......O...#..#..O.....O..OO.OO.#..#.#O.#O..#O.##..............O...O.#O..#..#.O......##.
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..O.#.....O#O......O#O#..O.O.....#...OO.#.O.#....#.###....#.#...........O#O.....OO.#..O...#..OO...#O
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#..O..O..O#..O...#O.#...###..O..#.O#.#OO.......OO..........O..OOO...#....OO......O..OO#.OO#...O.O.O.
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O.O..O..##..O...O.#O#.O.#.O..#O.OO#.OO..O..#...O.........#OO.......O...OO..####O...O..O...#OOO..O.O.
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O..#.O.#.OOO...#O.....O#O.#O#.OO...#OO.#.##.........O..O#O#.#.O#...O..O....O..#O...O#O...O..O.O.....
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O.O..O...#.O#.#...O..#.O.#.O##.O..#..#...OO#...##.O.#.##.OOO.#.........O.O....#..O.O.....#......OOO.
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O..#O.#....OO#..O.##........O...#.#.....OO.....#O...OO........OO.#OO.....#.......O.#..OO#..O.#O#....
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.OO..O.#..#...O.O.OOO#.O...O.O..OO.#O#..OO..#.....#.#..O....O.#O.##...O..O.....#...##...O.O#O...O..O
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#....O.#......OO....#..O#.OOO..O.#...O.........###O.....##..O..O.O.O.O....##.....O...O.O..O.O.....O.
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#...OO...O....##O........O.O..OO..#.....#.....OO...O...O.....#..O...#.....#.#...#...................
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...O....O..OO.OO.......##...#OOO.....O..OO.O#.#........O..O.O....O.#.O#...#.#.........#......O....#.
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O.........#..#..##..OO#....#..OO#O....O.O...O...................O.....O..OO.O.O.O..O.#...#...O.#.#O.
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....#.O#.O..#..#..#...#OO.#.......O.#....O...O...#.##...O...O....O#.O.....O#....#.#......#.#..O.O.O.
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#O##.#.....#.##O..#...O...###.OO......#......#O....#..#..O........#.O..O.....O#..O...OO#..OO.#.OO.OO
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.O#.###O.O.#...####O....#.##O.O##.#..#.#..O........###.#....##O....O.O....OO.O...O.#O...OOO##...#.O.
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....O..O....O............O.O......OO.##..#OO..#O...#.O.O..#..#O.O.........##.#..#..OO.....O.......#.
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O....##.#O...O.OO..O#..O...#...O.OO.#..O.#......#.O..#.#..........O###...OOO.O..#.......O.O.O......O
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.#......##...O.....#.O.....O.#.......O#O...O#.O.......O..#O..O#...O..O..OO#..#.O#...O.#.#.O...#.#.OO
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...O.#.O.#......##..O..........OOO.....O.O......O.....O..#.O..#...#.OOO...O..#..#...#......O...#...O
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..O..OO...#..#O....OO...#O...O#..O##....O#....#..#.#...#...........###...........#...OO...OO........
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OO....O...#OO..O..O.O.O..#.O.....O.#...O........OO...#......O.#....O..O.#.##.........OO.O#...O.OO...
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.#.....O.O#O..O.....#.#...O.O##O.......#..O#.#.#.OO#.O.O.#O#..OO..O.#O..O.OOOO......O....O...#..#...
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#......O..#...O..#.O....#..OO...#.........O.O...#..O......O.O.O.#.O.......O..##..O#.#..O..#....OO.#.
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.O..##O#O.O.O....#...#..O#.#.#.......O........#..#OO.OO..O..O.#...O..OOOO.....O#....O####.......#...
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.#OO#.O.#..........OO..O.......O#....#.OO#...##......####...O...OOO...#....O.#..O.......#..O.O......
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....O..#........#OO.......O.#..O...O..O..#.O....#.O.O.O..OO.O#O.O..O.###..O.#.#.......#.#...O#...O..
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OO....O#O.O.#.#.##O#.#O#....#....O.O.......O.O.OO....O#.....O.O.OO#.##.O.#..##O..O..O#O......O...O#O
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.#...#O..##.##.OO....##.....#O...#.O.O..#.....##......OO#OO.#...O...#..O....O#.#.O..O.#.......O.#.#O
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O.#OO#OOO..O.#..OO..O......#O...O....##..#..#O...OO#.#.OO........O.#...O..O#OOO.O....##.O.O........#
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.###..O.O...O#O..OO.O....#...OO.OO.O..OO..O.O.O.........#.O#...#...#..O..#..O..OO..#.O.....OO#......
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.O#...O#..#.....O......O##..O.O.O..#..#.#.....#...#....#..#...O.O#..O...O..#...O......#.#...O.....O.
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.O#..OO#.O.O...#O...O.....#....##..####.....O..O.....O...#O..#.......#OOO#.#....O.......O.#O.#..O#..
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......O.O#....O.......O.O...O..O#..O...#....#O..##OO.#O......OOO.....#.#O.O#.O#.O....O#O#O..###.#...
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#.O....#O......OOO......##.O.OO....#O...#OO...OO.##...O.O..#OO..OOO#..#.O.........O#...O........#...
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.O....#.......O#.O..##...O##OO......#..O.O#O.O.#...........#OO........O...O....#.............#.#..O.
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....#O.#..#.#..........OO...O..........O....O#...#OO.......O...O.#OO..OOO....O.O#..O.O.###..O.O#...O
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O...#..OO....O.......#.OO...O........O.OO..#..#..#.#.O..O.#....O.O......OO..OO.O..#..OOO#..OOO......
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.OO#.O.....O..#...O.....O....O#........#....#.....O..#..###...#.O.......OO......O..O.OO..O..#.O#O#..
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O....O...##.#....#O..O.#......................O..O#OOO..##....#.#..O.O.....O#..O.O.O...#.#.OOO...O..
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.......O..OO.O..O#.OO.#.O..#O....#.OOO.........##......#.O#.O..O....O....O.....#O.O...O.#.......O.#O
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....O##.#...O.##...O#...OOOO...OO...#.O.#...O.#O.......#.O.....##....O.#O....#......##.O....O.OO#..O
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OO...O#O#O#.#OO.#O.O..#.#.#.#.............#.O........#...O..O......O#.#OO.O...#.O..O...O#.O....O#..O
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.#..O..#.OO.#O...O#.O.#.#..#.......#.......#O...#..#O#....O...#....OO.....O......O..#.....O..O..#.O#
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...OO....O.#....#.O.#..#.#O.#.#O.....O..O##.......O..#O.#.O...OOO#O.#......O....#......#......O##...
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...##.O.O.....##....O.....#O..O........#.#.O#O....O#..O...O#OO...O....O..O.O.#.#..#OO...O..#....OO..
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O...#OO.O.OO#..O....##O...#....#...#.O.O..O.........#..##.#O.#.OO..OO...#...O.O#.OO..#.O.OO#.#..##OO
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..O.O#..O..#O...O.#.O.#....#....#.#O...O..O#O....#...#..#..##......#.O..........OOO........O.#......
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.....#....#....OO....#....O.#O..O...O#O..#...###....O.....O........##.#.#..#.O.OO.#O.O.O..#...O#O..O
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.OO.....O.O.....#....O.O....O......O#O....O#.#..O....O.#............#..O.#.....OO....O...O....O.#.O.
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.........O#OO.#O.....O......O...#..#O..O.#...O.O..OO.........#.O#OO.#.OO.........#.OO..O.O#O..O.O#..
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#...O...O....#O.###.....O.OO..O..OO.O#O....#O..#O..OO..O..#........O...#.....#..#...OO..O....#.....O
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......O.O.OO#.O.......O#O.OO.#..O....O...#.O#..#....O.#....#..#O...#.OO.O#........#......O....O.O...
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..#...##...#.O.O..#...O#.....##.......OO..O.#....O.O#O#..O...O#..OO...##O...O..O.....#.#...O.O......
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OOO.O.O#O......#..OO.O...OO...O............O..O#..##O...###.#......O#..#.O..O.OOO...#..O#......#OO.#
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O###.......#.O.O.#.....#.OO..O.O...#..O#O..#O.O.#.O..O.O..O#.#....#..#...O#..###.#..O#.O.........OO.
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.......#O#OO#...#.#...#.O...O.....O.O#.....O.O.O##.#...#O.#....OO...O.OO..O....O.O..#..#.....O...#..
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.O..###..OO#O.#.#OO.O#...#..O#...O.....O#.O......O...OO..O..O.....O..##.....OO.....O......O........O
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..O..#.O.#..OO.O#..O#..O.....OO#O#....OO.OO#O...O...O.O......OO.#O#....O..#O.#.OO##.#....#O#.#......
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O.#O.O.O.O...OO.....O.#...##..#....O....O..#..#O#..O#.#.OO.#O..........#...O..##..O.##.O.O...#.#O..#
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......O#...O.#..O#.O.........#.#....O.O....O.#..O..O##.#..O....#..#O#.OO.........#.O##O.....OO.OO.O.
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#....#.#O.O.O............O.O.#.O..O.........O..O........O......O.....OO.OO..OO.#....OO.OO.#....#..##
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.......#...O.O.#.O.....#.O#.#..O..O...O.O.#O..#...##.........O..#.OO..O........#.....#.......OO.....
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...#....O...O...#O.OO...#....#..O.#.O.#......##.#.#.OO.O.O...#..#..O........O.##..O...O#O...OO.O....
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.......OO...O..O...........O###......#....O.......O..O.....O#...#.O.#.#......O..O.....#.#OO.......O.
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.#..#.....#.O..O..O.....##..O.........O#.##O....OO...O...#..O.O.##OO......O.#..O....O..O.#.O.O...O.O
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.O....O...O....#.O......#..##O.#..O..O.....O...OO..###....#..#..#..........#.#.#.#.#........O...O.O.
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.OOO.#.#O....O.#...OO#.##...#...O.#...OO..###..OO.#.O....O..OO#..O..O....O#.#.O####..O....O..O#O....
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.OO.OO#......#....#..##O#O...OO....#....O......OO..OOO.....##.......O#.#.O.#O......O..#.#O..O.O..#..
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@ -0,0 +1,109 @@
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use std::cmp::Ordering;
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fn main() {
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println!("{}", part1(include_str!("./input.txt")));
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}
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fn part1(input: &str) -> usize {
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let slid_lines = slide_north(input);
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slid_lines
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.iter()
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.enumerate()
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.map(|(i, line)| line.iter().filter(|c| **c == 'O').count() * (slid_lines.len() - i))
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.sum()
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}
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fn slide_north(input: &str) -> Vec<Vec<char>> {
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let lines = input.lines().collect::<Vec<_>>();
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let columns = (0..lines[0].len())
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.map(|i| {
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let mut column = lines
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.iter()
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.map(|row| row.chars().nth(i).unwrap())
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.collect::<Vec<_>>();
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// bubble sort
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for n in (1..column.len()).rev() {
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for j in 0..n {
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if sort_slide_north(&column[j], &column[j + 1]) == Ordering::Greater {
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column.swap(j, j + 1);
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}
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}
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}
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column
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})
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.collect::<Vec<_>>();
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(0..columns[0].len())
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.map(|i| {
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columns
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.iter()
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.map(|column| *column.get(i).unwrap())
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.collect::<Vec<_>>()
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})
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.collect::<Vec<_>>()
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}
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fn sort_slide_north(a: &char, b: &char) -> Ordering {
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if a == &'#' || b == &'#' {
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Ordering::Equal
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} else if a == &'.' && b == &'O' {
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Ordering::Greater
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} else if a == &'O' && b == &'.' {
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Ordering::Less
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} else {
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a.cmp(b)
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}
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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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use indoc::indoc;
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const INPUT: &str = indoc!(
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"
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O....#....
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O.OO#....#
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.....##...
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OO.#O....O
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.O.....O#.
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O.#..O.#.#
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..O..#O..O
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.......O..
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#....###..
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#OO..#....
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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!(part1(INPUT), 136);
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}
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#[test]
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fn test_slide_north() {
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assert_eq!(
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slide_north(INPUT)
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.iter()
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.map(|line| line.iter().collect::<String>())
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.collect::<Vec<_>>()
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.join("\n"),
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indoc!(
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"
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OOOO.#.O..
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OO..#....#
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OO..O##..O
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O..#.OO...
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........#.
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..#....#.#
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..O..#.O.O
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..O.......
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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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@ -0,0 +1,196 @@
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use std::{cmp::Ordering, collections::HashMap};
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const REPETITIONS: u32 = 1_000_000_000;
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fn main() {
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println!("{}", part2(include_str!("./input.txt")));
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}
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fn part2(input: &str) -> usize {
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let mut lines = input
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.lines()
|
||||
.map(|l| l.chars().collect())
|
||||
.collect::<Vec<Vec<_>>>();
|
||||
|
||||
let mut seen = HashMap::new();
|
||||
seen.insert(lines.clone(), 0);
|
||||
|
||||
let mut stop_at = None;
|
||||
|
||||
for i in 1..REPETITIONS + 1 {
|
||||
lines = cycle(lines);
|
||||
// stop at correct iteration
|
||||
if stop_at.is_some_and(|j| j == i) {
|
||||
break;
|
||||
}
|
||||
// check if we've seen this before & calculate where to stop
|
||||
if seen.contains_key(&lines) && stop_at.is_none() {
|
||||
let repeat_period = i - seen.get(&lines).unwrap();
|
||||
stop_at = Some(i + ((REPETITIONS - i) % repeat_period));
|
||||
}
|
||||
seen.insert(lines.clone(), i);
|
||||
}
|
||||
|
||||
lines
|
||||
.iter()
|
||||
.enumerate()
|
||||
.map(|(i, line)| line.iter().filter(|c| **c == 'O').count() * (lines.len() - i))
|
||||
.sum()
|
||||
}
|
||||
|
||||
fn cycle(matrix: Vec<Vec<char>>) -> Vec<Vec<char>> {
|
||||
let north_lines = transmute(slide_rows_left(transmute(matrix)));
|
||||
|
||||
let west_lines = slide_rows_left(north_lines);
|
||||
|
||||
let south_lines = transmute(reverse_rows(slide_rows_left(reverse_rows(transmute(
|
||||
west_lines,
|
||||
)))));
|
||||
|
||||
reverse_rows(slide_rows_left(reverse_rows(south_lines)))
|
||||
}
|
||||
|
||||
fn transmute<T: Copy>(matrix: Vec<Vec<T>>) -> Vec<Vec<T>> {
|
||||
(0..matrix[0].len())
|
||||
.map(|i| {
|
||||
matrix
|
||||
.iter()
|
||||
.map(|row| *row.get(i).unwrap())
|
||||
.collect::<Vec<_>>()
|
||||
})
|
||||
.collect::<Vec<_>>()
|
||||
}
|
||||
|
||||
fn reverse_rows<T: Copy>(matrix: Vec<Vec<T>>) -> Vec<Vec<T>> {
|
||||
matrix
|
||||
.iter()
|
||||
.map(|row| {
|
||||
let mut row = row.clone();
|
||||
row.reverse();
|
||||
row
|
||||
})
|
||||
.collect::<Vec<_>>()
|
||||
}
|
||||
|
||||
fn slide_rows_left(lines: Vec<Vec<char>>) -> Vec<Vec<char>> {
|
||||
lines
|
||||
.into_iter()
|
||||
.map(|mut row| {
|
||||
for n in (1..row.len()).rev() {
|
||||
for i in 0..n {
|
||||
if sort_slide_line(&row[i], &row[i + 1]) == Ordering::Greater {
|
||||
row.swap(i, i + 1);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
row
|
||||
})
|
||||
.collect()
|
||||
}
|
||||
|
||||
fn sort_slide_line(a: &char, b: &char) -> Ordering {
|
||||
if a == &'#' || b == &'#' {
|
||||
Ordering::Equal
|
||||
} else if a == &'.' && b == &'O' {
|
||||
Ordering::Greater
|
||||
} else if a == &'O' && b == &'.' {
|
||||
Ordering::Less
|
||||
} else {
|
||||
a.cmp(b)
|
||||
}
|
||||
}
|
||||
|
||||
#[cfg(test)]
|
||||
mod tests {
|
||||
use super::*;
|
||||
use indoc::indoc;
|
||||
|
||||
const INPUT: &str = indoc!(
|
||||
"
|
||||
O....#....
|
||||
O.OO#....#
|
||||
.....##...
|
||||
OO.#O....O
|
||||
.O.....O#.
|
||||
O.#..O.#.#
|
||||
..O..#O..O
|
||||
.......O..
|
||||
#....###..
|
||||
#OO..#....
|
||||
"
|
||||
);
|
||||
|
||||
#[test]
|
||||
fn test_part2() {
|
||||
assert_eq!(part2(INPUT), 64);
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn test_cycle() {
|
||||
let lines = INPUT
|
||||
.lines()
|
||||
.map(|l| l.chars().collect())
|
||||
.collect::<Vec<Vec<char>>>();
|
||||
// one cycle
|
||||
assert_eq!(
|
||||
cycle(lines.clone()),
|
||||
indoc!(
|
||||
"
|
||||
.....#....
|
||||
....#...O#
|
||||
...OO##...
|
||||
.OO#......
|
||||
.....OOO#.
|
||||
.O#...O#.#
|
||||
....O#....
|
||||
......OOOO
|
||||
#...O###..
|
||||
#..OO#...."
|
||||
)
|
||||
.lines()
|
||||
.map(|l| l.chars().collect())
|
||||
.collect::<Vec<Vec<_>>>()
|
||||
);
|
||||
// two cycles
|
||||
assert_eq!(
|
||||
cycle(cycle(lines.clone())),
|
||||
indoc!(
|
||||
"
|
||||
.....#....
|
||||
....#...O#
|
||||
.....##...
|
||||
..O#......
|
||||
.....OOO#.
|
||||
.O#...O#.#
|
||||
....O#...O
|
||||
.......OOO
|
||||
#..OO###..
|
||||
#.OOO#...O"
|
||||
)
|
||||
.lines()
|
||||
.map(|l| l.chars().collect())
|
||||
.collect::<Vec<Vec<_>>>()
|
||||
);
|
||||
// three cycles
|
||||
assert_eq!(
|
||||
cycle(cycle(cycle(lines.clone()))),
|
||||
indoc!(
|
||||
"
|
||||
.....#....
|
||||
....#...O#
|
||||
.....##...
|
||||
..O#......
|
||||
.....OOO#.
|
||||
.O#...O#.#
|
||||
....O#...O
|
||||
.......OOO
|
||||
#...O###.O
|
||||
#.OOO#...O"
|
||||
)
|
||||
.lines()
|
||||
.map(|l| l.chars().collect())
|
||||
.collect::<Vec<Vec<_>>>()
|
||||
);
|
||||
}
|
||||
}
|
||||
Loading…
Reference in New Issue