commit 955b43c048bed5d8356835b80b3ab991eaea1ef0 · hauleth.dev/advent-of-code

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2020/day03.livemd

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       <!-- livebook:{"persist_outputs":true} -->

     

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       # Day 03

     

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       ```elixir

     

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       Mix.install([:kino_aoc])

     

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       ```

     

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       ## Section

     

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       <!-- livebook:{"attrs":"eyJhc3NpZ25fdG8iOiJwdXp6bGVfaW5wdXQiLCJkYXkiOiIzIiwic2Vzc2lvbl9zZWNyZXQiOiJBRFZFTlRfT0ZfQ09ERV9TRVNTSU9OIiwieWVhciI6IjIwMjAifQ","chunks":null,"kind":"Elixir.KinoAOC.HelperCell","livebook_object":"smart_cell"} -->

     

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       ```elixir

     

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       {:ok, puzzle_input} =

     

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         KinoAOC.download_puzzle("2020", "3", System.fetch_env!("LB_ADVENT_OF_CODE_SESSION"))

     

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       ```

     

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       <!-- livebook:{"output":true} -->

     

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       ```

     

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       {:ok,

     

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        "....#...##.#.........#....#....\n#.......#...#...#.#............\n#..#..#.#.##....#.#........#...\n........##...................#.\n........#...##...#.#.###.......\n##............#...#.....#.##...\n...........#....###...#.....#..\n.......#......#..##..#.....#...\n..#.#..#....#.........#...#..#.\n.........##......#.....##..##..\n........#.....#....#..##......#\n..#..#.......#..............#..\n.....#.#.......................\n.#.#....#.........#............\n.......#.....#.###.............\n......##......#...........#..#.\n.#...............##...#........\n.....#..##........###.........#\n#...........#..#............#..\n.........#....#..#.#......#....\n.......#.........#..##.........\n.##.....#..................#...\n....#............#.#....#.....#\n..#....#...##....#...#.#...#...\n..........#................#.#.\n#...#.#.#.####..#.#..........#.\n..#...#.##......#...........#..\n..#.....#...#.......#......#..#\n..............#.......#........\n.#..#..........#.....#...#..#.#\n#........#...#......#.......#..\n#..................#...........\n..#...#........#...#..#........\n..............#.....#.....#..#.\n#.#.......#..............##.##.\n....#.#.....##....#...........#\n......#....#...#..#.......#....\n....#..#.#.....#..##.....#....#\n...........#.......#.#.#.......\n#.......#..##........#..#......\n.........#.##..#..............#\n...........#............###.#..\n..#.....#.....##...#.........#.\n....##............##........#..\n.....###..........#......##....\n#...##..#..#..........#........\n....#.....#.......#..#.#...##..\n.#....#........#.#.........#.#.\n##...#.#.....#......#..........\n.....##.....#....#.....###.#..#\n..............#..###..#...#..#.\n....#...#....#.............#.#.\n.#.........#.....#........#.##.\n....#.........#..........#.....\n.......#........#.#.#..........\n#........##....#.........#.....\n..##..........#....#.#...#....#\n#...#.#......#..##..........#.#\n.....#..#...#..#...............\n#...#..............#...........\n.#...#....#..##.....#....#.#...\n.#...#.......#...#..#.##....#..\n#....#........#....#...#.......\n#..#......#.....#.....#..##....\n......#.#....##....##..#...#...\n..#....#.#.###..............#..\n.#.##.......#.#.#..#...#..#....\n..#..........#.#....#..#.#....#\n..........#...#...#..........#.\n..........#.....#.#..#..#....##\n.#.#...##...#...........####...\n........##..#.#..........#.##.#\n#......###...........#...#.....\n..#.#....##.........##....#....\n#....#.##..##..#..#.....#.....#\n.##.....##....##....#.......#..\n#...#.....##....#..........#...\n............#.#.##....#....#...\n....#............#.....#......#\n....................#..........\n..#....................#..#....\n....#.....#........#..##...#...\n#.....#.#....................##\n.#....#.#.#...#..........#....#\n....#...#......#...#.....##...#\n.....#.........................\n.......#..#.#...#...#...#.....#\n...#......#.##.#...#..#...##.#.\n...........................#..#\n..#.#.....#........##..........\n....#...##........#.#.#..#...##\n..##.....#..###.........##.##..\n.#..#.....#...#.............#..\n#..............##...#....##....\n.##......#.#............#......\n.............##...#.#.......#..\n.........#..#..#...............\n........##......#....##........\n...#.........#.#.#.............\n#..........#......#......#..#..\n.............##.#.#..#.#.#...#.\n.....#.........#...............\n..##.#..#.....##..#........#.#.\n.#..........#.#.......#......##\n.#........................#....\n#....#....#...#..#......#......\n........#.......#......#.....#.\n.....#....##..#...###...#....#.\n....#.........#....#......#....\n.............#...#....#.......#\n.....#.........#..#.#..........\n.........#..#........#.#.#.....\n......#.##......#....#.#.##.#..\n.#...#.#...#...#.#......#....##\n.#................#......#.....\n#.#.#...............#..........\n.....#.#.......#...#........#..\n#...#.#.#.##..#...........#..#.\n.............###.........#....#\n.#.....#.......##....##.......#\n....#...#.......#.##.....#.....\n...........##.........#...#....\n..............#.#..#.....#..#..\n#.#...#..#.#.........#......#.#\n#.##.....##....#........#.#.#.#\n##.#.###.........##.......#..#.\n#.....#.....................#..\n.........##........#...........\n" <> ...}

     

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       ```

     

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       ```elixir

     

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       slope =

     

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         puzzle_input

     

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         |> String.split("\n", trim: true)

     

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       ```

     

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       <!-- livebook:{"output":true} -->

     

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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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        ".....#.#.......................", ".#.#....#.........#............",

     

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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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        "..............#.......#........", ".#..#..........#.....#...#..#.#",

     

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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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        ".....###..........#......##....", "#...##..#..#..........#........",

     

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        "....#.....#.......#..#.#...##..", ".#....#........#.#.........#.#.",

     

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        "##...#.#.....#......#..........", ".....##.....#....#.....###.#..#", ...]

     

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       ```

     

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       ```elixir

     

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       binary_slice("abc", 5, 1)

     

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       ```

     

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       <!-- livebook:{"output":true} -->

     

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       ```

     

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       ""

     

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       ```

     

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       ```elixir

     

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       defmodule Toboggan do

     

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         def slide(slope, {dx, dy}) do

     

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           slope

     

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           |> Enum.take_every(dy)

     

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           |> Enum.reduce({0, 0}, fn row, {pos, count} ->

     

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             dc = if binary_part(row, rem(pos, byte_size(row)), 1) == "#", do: 1, else: 0

     

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             {pos + dx, count + dc}

     

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           end)

     

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           |> elem(1)

     

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         end

     

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       end

     

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       ```

     

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       <!-- livebook:{"output":true} -->

     

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       ```

     

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       {:module, Toboggan, <<70, 79, 82, 49, 0, 0, 9, ...>>, {:slide, 2}}

     

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       ```

     

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       ## Part 1

     

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       ```elixir

     

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       Toboggan.slide(slope, {3, 1})

     

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       ```

     

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       <!-- livebook:{"output":true} -->

     

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       ```

     

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       254

     

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       ```

     

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       ## Part 2

     

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       ```elixir

     

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       [

     

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         {1, 1},

     

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         {3, 1},

     

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         {5, 1},

     

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         {7, 1},

     

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         {1, 2}

     

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       ]

     

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       |> Enum.map(&Toboggan.slide(slope, &1))

     

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       |> Enum.product()

     

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       ```

     

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       <!-- livebook:{"output":true} -->

     

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       ```

     

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       1666768320

     

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       ```

     

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       <!-- livebook:{"offset":7450,"stamp":{"token":"XCP.NoSFu8ULnZhWAsLV6KwdSJblZR21o6kgNjJs3gczqJcYu7u7w_HScRZAL77iGr_ANQuyNyfr_CBU1KjRZ9e7nllBTnLxF6esiGCVXrSCKYPlWFFGN8VONns6BoBdQss9DU8","version":2}} -->

+484

2020/day04.livemd

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       <!-- livebook:{"persist_outputs":true} -->

     

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       # Day 04

     

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       ```elixir

     

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       Mix.install([:kino_aoc])

     

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       ```

     

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       ## Section

     

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       <!-- livebook:{"attrs":"eyJhc3NpZ25fdG8iOiJwdXp6bGVfaW5wdXQiLCJkYXkiOiI0Iiwic2Vzc2lvbl9zZWNyZXQiOiJBRFZFTlRfT0ZfQ09ERV9TRVNTSU9OIiwieWVhciI6IjIwMjAifQ","chunks":null,"kind":"Elixir.KinoAOC.HelperCell","livebook_object":"smart_cell"} -->

     

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       ```elixir

     

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       {:ok, puzzle_input} =

     

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         KinoAOC.download_puzzle("2020", "4", System.fetch_env!("LB_ADVENT_OF_CODE_SESSION"))

     

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       ```

     

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       <!-- livebook:{"output":true} -->

     

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       ```

     

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       {:ok,

     

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        "hcl:#6b5442 ecl:brn iyr:2019\npid:637485594 hgt:171cm\neyr:2021 byr:1986\n\neyr:2025 iyr:1938 byr:2014 hcl:#341e13\nhgt:66cm\npid:70195175\n\nhcl:#efcc98\niyr:2011 ecl:hzl\neyr:2020 hgt:174cm pid:589700330\n\nhcl:#bba027 eyr:2027 cid:54\necl:brn pid:153cm\niyr:2028 hgt:173cm\nbyr:2004\n\nhcl:b45cec\niyr:2011 ecl:oth hgt:185cm eyr:2029 pid:178cm\n\nhgt:185cm iyr:2016 eyr:2029 hcl:#888785 pid:026540921\n\neyr:2025\nhcl:6962f7 byr:2015 ecl:oth iyr:1974\nhgt:191cm\npid:2616015\n\npid:268398556 iyr:2019 ecl:grn\neyr:2027 byr:1951 hcl:#18171d hgt:67cm\n\neyr:2029 hgt:153cm ecl:brn pid:183179186 byr:2013 hcl:#623a2f\niyr:1957\n\ncid:121 iyr:1922 hcl:752fbc pid:79577560 byr:2025\nhgt:61cm eyr:1971\n\niyr:2016\neyr:2024 hcl:#18171d hgt:184cm\necl:hzl byr:1992 pid:751161201\n\neyr:2021 ecl:blu byr:1938 iyr:2016 hcl:#b6652a pid:313406514 hgt:191cm\n\nhcl:#623a2f eyr:2021\necl:brn\npid:145249653 hgt:167cm iyr:2019 byr:1991\n\niyr:2022 pid:175cm\nbyr:2021 eyr:2027 ecl:#f615b1\nhgt:172in hcl:#ceb3a1\n\nhgt:173in\necl:#0cba5e pid:1885981567 iyr:1968\nbyr:1952\neyr:1942\n\necl:oth eyr:2023 hgt:65cm pid:521737908 byr:1971 hcl:z iyr:2017\n\nbyr:1936\nhcl:#cfa07d\necl:brn iyr:2011 pid:589047874\neyr:2025\n\nhcl:#fffffd\npid:912552538\ncid:159 hgt:160cm iyr:2012\neyr:2023 ecl:hzl\nbyr:1946\n\niyr:2015\necl:amb hgt:72in\ncid:59 pid:782818257 hcl:#18171d eyr:2026\nbyr:1952\n\nhgt:173cm iyr:2018 cid:96 ecl:amb byr:1986 pid:783160698 eyr:2026\nhcl:#602927\n\nhcl:#a97842 cid:199 pid:912273414 eyr:2030\nhgt:171cm ecl:hzl iyr:2011 byr:1960\n\necl:amb hgt:156cm\niyr:2013\nhcl:#ceb3a1\ncid:116 pid:567057004 byr:1942\neyr:2029\n\necl:#cddc40\npid:045090966 cid:254\nhgt:75in hcl:#733820 eyr:2026 byr:1956\niyr:2015\n\npid:156cm\neyr:2040\nhgt:176cm ecl:#02e67d hcl:b7c0e6\niyr:1959 cid:129 byr:2022\n\nhgt:160cm byr:1933\necl:blu eyr:2029 iyr:2012 hcl:#888785 pid:028571975\n\niyr:2017\nhcl:#390f37 hgt:171cm ecl:brn byr:1931 pid:015365720 eyr:2030\n\niyr:2014 pid:697057757\neyr:2026 hgt:188cm\necl:gry byr:1926\n\npid:484310015 hcl:#fffffd hgt:150cm iyr:2018\ncid:53 ecl:gry eyr:2021 byr:1957\n\nhgt:156cm\neyr:2026 byr:1963\npid:063272603 ecl:brn iyr:2011\nhcl:#888785\n\nbyr:1955 pid:310518398 hgt:191cm iyr:2018\necl:oth eyr:2023 cid:132 hcl:#888785\n\nbyr:1938 hcl:#623a2f eyr:2023\niyr:2010\nhgt:165cm\npid:170304863\ncid:290 ecl:amb\n\neyr:2026\npid:021468065 hgt:164cm\nbyr:1996 iyr:2016 hcl:#18171d\necl:brn\n\nbyr:2027 ecl:oth pid:8258823391 hgt:153in hcl:#733820 eyr:1948\n\nbyr:2026 ecl:#cd275a iyr:2012 eyr:2036 pid:5917499975\n\nbyr:2004\ncid:151\nhcl:99ecb1\neyr:2033 pid:871137711 iyr:1997\nhgt:184cm ecl:oth\n\nbyr:2011\nhcl:z ecl:#eee1d2 hgt:59cm eyr:1925 iyr:2030 pid:#02ee78\n\npid:742658992\nhcl:#888785\nbyr:1995\neyr:2024 hgt:162cm iyr:2013 cid:169 ecl:gry\n\nhgt:152cm byr:1946\neyr:2027 iyr:2018\npid:352799678\nhcl:#238da0\necl:amb\ncid:71\n\nhcl:#623a2f pid:723616064 eyr:2021\nhgt:172cm\nbyr:1926 iyr:2013\necl:grn\n\niyr:2019 hgt:94 byr:2028 eyr:1986\npid:#ee7f00\n\necl:amb\neyr:2027 pid:188153423 byr:1957 hcl:#d67ae1\niyr:2011 hgt:183cm\n\nbyr:1950 ecl:#e2495d iyr:2010 hgt:166cm eyr:2034 pid:151457075\n\neyr:1981\nbyr:2016 iyr:2029 pid:153cm ecl:#55c2a4 hcl:z\nhgt:76cm\n\nhgt:184cm ecl:amb eyr:2021\nhcl:#623a2f\npid:414607669 iyr:1960 byr:2002\n\neyr:2027 iyr:2020 hgt:179cm byr:1991\npid:969568248\necl:blu\n\nhgt:175cm pid:536803427 hcl:#a97842 iyr:2012\necl:grn byr:1950 eyr:2027\n\neyr:2028 hgt:60in hcl:#733820 iyr:2018 ecl:oth pid:871909483\nbyr:1930\n\nhgt:155cm iyr:2020 byr:1960 eyr:2021\npid:515710074 ecl:amb hcl:#341e13\n\nbyr:1922 hcl:z iyr:1977 ecl:brn\neyr:2023 hgt:119 pid:865700639\n\necl:gry hcl:959fcd pid:#633ac1\nbyr:2011 hgt:68in\neyr:2020\n\niyr:1972 hcl:z cid:149 byr:2020\nhgt:166in pid:4548657 eyr:1960\necl:#cc987c\n\neyr:2023 hcl:#b6652a iyr:2015\nhgt:187in pid:547953710 byr:1979 ecl:grn\n\niyr:2018\npid:508691429 ecl:oth eyr:2025 hgt:187cm cid:270\nhcl:#888785 byr:1977\n\nhgt:168cm eyr:2032 byr:2020\necl:gry iyr:1982\nhcl:z pid:648015564\n\nhcl:#fffffd pid:911858643 iyr:2016 ecl:gry eyr:2030 byr:1992 hgt:156cm\n\npid:241562994 eyr:2026 ecl:grn hgt:164cm\nhcl:#c0946f byr:1945 iyr:2015 cid:296\n\nbyr:1976 pid:269322775 ecl:hzl\nhgt:162cm hcl:#b6652a\neyr:2022 cid:335 iyr:2012\n\neyr:2028\nhgt:106\npid:268626219 hcl:#a97842\niyr:2011\necl:grn byr:" <> ...}

     

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       ```

     

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       ```elixir

     

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       passports =

     

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         puzzle_input

     

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         |> String.split("\n\n", trim: true)

     

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         |> Enum.map(fn passport ->

     

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           passport

     

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           |> String.split(~r/\s/, trim: true)

     

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           |> Map.new(fn <<key::3-binary, ":", data::binary>> ->

     

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             {key, data}

     

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           end)

     

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         end)

     

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       ```

     

       37
       37
       +
       

     

       38
       38
       +
       <!-- livebook:{"output":true} -->

     

       39
       39
       +
       

     

       40
       40
       +
       ```

     

       41
       41
       +
       [

     

       42
       42
       +
         %{

     

       43
       43
       +
           "byr" => "1986",

     

       44
       44
       +
           "ecl" => "brn",

     

       45
       45
       +
           "eyr" => "2021",

     

       46
       46
       +
           "hcl" => "#6b5442",

     

       47
       47
       +
           "hgt" => "171cm",

     

       48
       48
       +
           "iyr" => "2019",

     

       49
       49
       +
           "pid" => "637485594"

     

       50
       50
       +
         },

     

       51
       51
       +
         %{

     

       52
       52
       +
           "byr" => "2014",

     

       53
       53
       +
           "eyr" => "2025",

     

       54
       54
       +
           "hcl" => "#341e13",

     

       55
       55
       +
           "hgt" => "66cm",

     

       56
       56
       +
           "iyr" => "1938",

     

       57
       57
       +
           "pid" => "70195175"

     

       58
       58
       +
         },

     

       59
       59
       +
         %{

     

       60
       60
       +
           "ecl" => "hzl",

     

       61
       61
       +
           "eyr" => "2020",

     

       62
       62
       +
           "hcl" => "#efcc98",

     

       63
       63
       +
           "hgt" => "174cm",

     

       64
       64
       +
           "iyr" => "2011",

     

       65
       65
       +
           "pid" => "589700330"

     

       66
       66
       +
         },

     

       67
       67
       +
         %{

     

       68
       68
       +
           "byr" => "2004",

     

       69
       69
       +
           "cid" => "54",

     

       70
       70
       +
           "ecl" => "brn",

     

       71
       71
       +
           "eyr" => "2027",

     

       72
       72
       +
           "hcl" => "#bba027",

     

       73
       73
       +
           "hgt" => "173cm",

     

       74
       74
       +
           "iyr" => "2028",

     

       75
       75
       +
           "pid" => "153cm"

     

       76
       76
       +
         },

     

       77
       77
       +
         %{

     

       78
       78
       +
           "ecl" => "oth",

     

       79
       79
       +
           "eyr" => "2029",

     

       80
       80
       +
           "hcl" => "b45cec",

     

       81
       81
       +
           "hgt" => "185cm",

     

       82
       82
       +
           "iyr" => "2011",

     

       83
       83
       +
           "pid" => "178cm"

     

       84
       84
       +
         },

     

       85
       85
       +
         %{"eyr" => "2029", "hcl" => "#888785", "hgt" => "185cm", "iyr" => "2016", "pid" => "026540921"},

     

       86
       86
       +
         %{

     

       87
       87
       +
           "byr" => "2015",

     

       88
       88
       +
           "ecl" => "oth",

     

       89
       89
       +
           "eyr" => "2025",

     

       90
       90
       +
           "hcl" => "6962f7",

     

       91
       91
       +
           "hgt" => "191cm",

     

       92
       92
       +
           "iyr" => "1974",

     

       93
       93
       +
           "pid" => "2616015"

     

       94
       94
       +
         },

     

       95
       95
       +
         %{

     

       96
       96
       +
           "byr" => "1951",

     

       97
       97
       +
           "ecl" => "grn",

     

       98
       98
       +
           "eyr" => "2027",

     

       99
       99
       +
           "hcl" => "#18171d",

     

       100
       100
       +
           "hgt" => "67cm",

     

       101
       101
       +
           "iyr" => "2019",

     

       102
       102
       +
           "pid" => "268398556"

     

       103
       103
       +
         },

     

       104
       104
       +
         %{

     

       105
       105
       +
           "byr" => "2013",

     

       106
       106
       +
           "ecl" => "brn",

     

       107
       107
       +
           "eyr" => "2029",

     

       108
       108
       +
           "hcl" => "#623a2f",

     

       109
       109
       +
           "hgt" => "153cm",

     

       110
       110
       +
           "iyr" => "1957",

     

       111
       111
       +
           "pid" => "183179186"

     

       112
       112
       +
         },

     

       113
       113
       +
         %{

     

       114
       114
       +
           "byr" => "2025",

     

       115
       115
       +
           "cid" => "121",

     

       116
       116
       +
           "eyr" => "1971",

     

       117
       117
       +
           "hcl" => "752fbc",

     

       118
       118
       +
           "hgt" => "61cm",

     

       119
       119
       +
           "iyr" => "1922",

     

       120
       120
       +
           "pid" => "79577560"

     

       121
       121
       +
         },

     

       122
       122
       +
         %{

     

       123
       123
       +
           "byr" => "1992",

     

       124
       124
       +
           "ecl" => "hzl",

     

       125
       125
       +
           "eyr" => "2024",

     

       126
       126
       +
           "hcl" => "#18171d",

     

       127
       127
       +
           "hgt" => "184cm",

     

       128
       128
       +
           "iyr" => "2016",

     

       129
       129
       +
           "pid" => "751161201"

     

       130
       130
       +
         },

     

       131
       131
       +
         %{

     

       132
       132
       +
           "byr" => "1938",

     

       133
       133
       +
           "ecl" => "blu",

     

       134
       134
       +
           "eyr" => "2021",

     

       135
       135
       +
           "hcl" => "#b6652a",

     

       136
       136
       +
           "hgt" => "191cm",

     

       137
       137
       +
           "iyr" => "2016",

     

       138
       138
       +
           "pid" => "313406514"

     

       139
       139
       +
         },

     

       140
       140
       +
         %{

     

       141
       141
       +
           "byr" => "1991",

     

       142
       142
       +
           "ecl" => "brn",

     

       143
       143
       +
           "eyr" => "2021",

     

       144
       144
       +
           "hcl" => "#623a2f",

     

       145
       145
       +
           "hgt" => "167cm",

     

       146
       146
       +
           "iyr" => "2019",

     

       147
       147
       +
           "pid" => "145249653"

     

       148
       148
       +
         },

     

       149
       149
       +
         %{

     

       150
       150
       +
           "byr" => "2021",

     

       151
       151
       +
           "ecl" => "#f615b1",

     

       152
       152
       +
           "eyr" => "2027",

     

       153
       153
       +
           "hcl" => "#ceb3a1",

     

       154
       154
       +
           "hgt" => "172in",

     

       155
       155
       +
           "iyr" => "2022",

     

       156
       156
       +
           "pid" => "175cm"

     

       157
       157
       +
         },

     

       158
       158
       +
         %{

     

       159
       159
       +
           "byr" => "1952",

     

       160
       160
       +
           "ecl" => "#0cba5e",

     

       161
       161
       +
           "eyr" => "1942",

     

       162
       162
       +
           "hgt" => "173in",

     

       163
       163
       +
           "iyr" => "1968",

     

       164
       164
       +
           "pid" => "1885981567"

     

       165
       165
       +
         },

     

       166
       166
       +
         %{

     

       167
       167
       +
           "byr" => "1971",

     

       168
       168
       +
           "ecl" => "oth",

     

       169
       169
       +
           "eyr" => "2023",

     

       170
       170
       +
           "hcl" => "z",

     

       171
       171
       +
           "hgt" => "65cm",

     

       172
       172
       +
           "iyr" => "2017",

     

       173
       173
       +
           "pid" => "521737908"

     

       174
       174
       +
         },

     

       175
       175
       +
         %{

     

       176
       176
       +
           "byr" => "1936",

     

       177
       177
       +
           "ecl" => "brn",

     

       178
       178
       +
           "eyr" => "2025",

     

       179
       179
       +
           "hcl" => "#cfa07d",

     

       180
       180
       +
           "iyr" => "2011",

     

       181
       181
       +
           "pid" => "589047874"

     

       182
       182
       +
         },

     

       183
       183
       +
         %{

     

       184
       184
       +
           "byr" => "1946",

     

       185
       185
       +
           "cid" => "159",

     

       186
       186
       +
           "ecl" => "hzl",

     

       187
       187
       +
           "eyr" => "2023",

     

       188
       188
       +
           "hcl" => "#fffffd",

     

       189
       189
       +
           "hgt" => "160cm",

     

       190
       190
       +
           "iyr" => "2012",

     

       191
       191
       +
           "pid" => "912552538"

     

       192
       192
       +
         },

     

       193
       193
       +
         %{

     

       194
       194
       +
           "byr" => "1952",

     

       195
       195
       +
           "cid" => "59",

     

       196
       196
       +
           "ecl" => "amb",

     

       197
       197
       +
           "eyr" => "2026",

     

       198
       198
       +
           "hcl" => "#18171d",

     

       199
       199
       +
           "hgt" => "72in",

     

       200
       200
       +
           "iyr" => "2015",

     

       201
       201
       +
           "pid" => "782818257"

     

       202
       202
       +
         },

     

       203
       203
       +
         %{

     

       204
       204
       +
           "byr" => "1986",

     

       205
       205
       +
           "cid" => "96",

     

       206
       206
       +
           "ecl" => "amb",

     

       207
       207
       +
           "eyr" => "2026",

     

       208
       208
       +
           "hcl" => "#602927",

     

       209
       209
       +
           "hgt" => "173cm",

     

       210
       210
       +
           "iyr" => "2018",

     

       211
       211
       +
           "pid" => "783160698"

     

       212
       212
       +
         },

     

       213
       213
       +
         %{

     

       214
       214
       +
           "byr" => "1960",

     

       215
       215
       +
           "cid" => "199",

     

       216
       216
       +
           "ecl" => "hzl",

     

       217
       217
       +
           "eyr" => "2030",

     

       218
       218
       +
           "hcl" => "#a97842",

     

       219
       219
       +
           "hgt" => "171cm",

     

       220
       220
       +
           "iyr" => "2011",

     

       221
       221
       +
           "pid" => "912273414"

     

       222
       222
       +
         },

     

       223
       223
       +
         %{

     

       224
       224
       +
           "byr" => "1942",

     

       225
       225
       +
           "cid" => "116",

     

       226
       226
       +
           "ecl" => "amb",

     

       227
       227
       +
           "eyr" => "2029",

     

       228
       228
       +
           "hcl" => "#ceb3a1",

     

       229
       229
       +
           "hgt" => "156cm",

     

       230
       230
       +
           "iyr" => "2013",

     

       231
       231
       +
           "pid" => "567057004"

     

       232
       232
       +
         },

     

       233
       233
       +
         %{

     

       234
       234
       +
           "byr" => "1956",

     

       235
       235
       +
           "cid" => "254",

     

       236
       236
       +
           "ecl" => "#cddc40",

     

       237
       237
       +
           "eyr" => "2026",

     

       238
       238
       +
           "hcl" => "#733820",

     

       239
       239
       +
           "hgt" => "75in",

     

       240
       240
       +
           "iyr" => "2015",

     

       241
       241
       +
           "pid" => "045090966"

     

       242
       242
       +
         },

     

       243
       243
       +
         %{

     

       244
       244
       +
           "byr" => "2022",

     

       245
       245
       +
           "cid" => "129",

     

       246
       246
       +
           "ecl" => "#02e67d",

     

       247
       247
       +
           "eyr" => "2040",

     

       248
       248
       +
           "hcl" => "b7c0e6",

     

       249
       249
       +
           "hgt" => "176cm",

     

       250
       250
       +
           "iyr" => "1959",

     

       251
       251
       +
           "pid" => "156cm"

     

       252
       252
       +
         },

     

       253
       253
       +
         %{

     

       254
       254
       +
           "byr" => "1933",

     

       255
       255
       +
           "ecl" => "blu",

     

       256
       256
       +
           "eyr" => "2029",

     

       257
       257
       +
           "hcl" => "#888785",

     

       258
       258
       +
           "hgt" => "160cm",

     

       259
       259
       +
           "iyr" => "2012",

     

       260
       260
       +
           "pid" => "028571975"

     

       261
       261
       +
         },

     

       262
       262
       +
         %{

     

       263
       263
       +
           "byr" => "1931",

     

       264
       264
       +
           "ecl" => "brn",

     

       265
       265
       +
           "eyr" => "2030",

     

       266
       266
       +
           "hcl" => "#390f37",

     

       267
       267
       +
           "hgt" => "171cm",

     

       268
       268
       +
           "iyr" => "2017",

     

       269
       269
       +
           "pid" => "015365720"

     

       270
       270
       +
         },

     

       271
       271
       +
         %{

     

       272
       272
       +
           "byr" => "1926",

     

       273
       273
       +
           "ecl" => "gry",

     

       274
       274
       +
           "eyr" => "2026",

     

       275
       275
       +
           "hgt" => "188cm",

     

       276
       276
       +
           "iyr" => "2014",

     

       277
       277
       +
           "pid" => "697057757"

     

       278
       278
       +
         },

     

       279
       279
       +
         %{

     

       280
       280
       +
           "byr" => "1957",

     

       281
       281
       +
           "cid" => "53",

     

       282
       282
       +
           "ecl" => "gry",

     

       283
       283
       +
           "eyr" => "2021",

     

       284
       284
       +
           "hcl" => "#fffffd",

     

       285
       285
       +
           "hgt" => "150cm",

     

       286
       286
       +
           "iyr" => "2018",

     

       287
       287
       +
           "pid" => "484310015"

     

       288
       288
       +
         },

     

       289
       289
       +
         %{

     

       290
       290
       +
           "byr" => "1963",

     

       291
       291
       +
           "ecl" => "brn",

     

       292
       292
       +
           "eyr" => "2026",

     

       293
       293
       +
           "hcl" => "#888785",

     

       294
       294
       +
           "hgt" => "156cm",

     

       295
       295
       +
           "iyr" => "2011",

     

       296
       296
       +
           "pid" => "063272603"

     

       297
       297
       +
         },

     

       298
       298
       +
         %{

     

       299
       299
       +
           "byr" => "1955",

     

       300
       300
       +
           "cid" => "132",

     

       301
       301
       +
           "ecl" => "oth",

     

       302
       302
       +
           "eyr" => "2023",

     

       303
       303
       +
           "hcl" => "#888785",

     

       304
       304
       +
           "hgt" => "191cm",

     

       305
       305
       +
           "iyr" => "2018",

     

       306
       306
       +
           "pid" => "310518398"

     

       307
       307
       +
         },

     

       308
       308
       +
         %{

     

       309
       309
       +
           "byr" => "1938",

     

       310
       310
       +
           "cid" => "290",

     

       311
       311
       +
           "ecl" => "amb",

     

       312
       312
       +
           "eyr" => "2023",

     

       313
       313
       +
           "hcl" => "#623a2f",

     

       314
       314
       +
           "hgt" => "165cm",

     

       315
       315
       +
           "iyr" => "2010",

     

       316
       316
       +
           "pid" => "170304863"

     

       317
       317
       +
         },

     

       318
       318
       +
         %{

     

       319
       319
       +
           "byr" => "1996",

     

       320
       320
       +
           "ecl" => "brn",

     

       321
       321
       +
           "eyr" => "2026",

     

       322
       322
       +
           "hcl" => "#18171d",

     

       323
       323
       +
           "hgt" => "164cm",

     

       324
       324
       +
           "iyr" => "2016",

     

       325
       325
       +
           "pid" => "021468065"

     

       326
       326
       +
         },

     

       327
       327
       +
         %{

     

       328
       328
       +
           "byr" => "2027",

     

       329
       329
       +
           "ecl" => "oth",

     

       330
       330
       +
           "eyr" => "1948",

     

       331
       331
       +
           "hcl" => "#733820",

     

       332
       332
       +
           "hgt" => "153in",

     

       333
       333
       +
           "pid" => "8258823391"

     

       334
       334
       +
         },

     

       335
       335
       +
         %{"byr" => "2026", "ecl" => "#cd275a", "eyr" => "2036", "iyr" => "2012", "pid" => "5917499975"},

     

       336
       336
       +
         %{

     

       337
       337
       +
           "byr" => "2004",

     

       338
       338
       +
           "cid" => "151",

     

       339
       339
       +
           "ecl" => "oth",

     

       340
       340
       +
           "eyr" => "2033",

     

       341
       341
       +
           "hcl" => "99ecb1",

     

       342
       342
       +
           "hgt" => "184cm",

     

       343
       343
       +
           "iyr" => "1997",

     

       344
       344
       +
           "pid" => "871137711"

     

       345
       345
       +
         },

     

       346
       346
       +
         %{

     

       347
       347
       +
           "byr" => "2011",

     

       348
       348
       +
           "ecl" => "#eee1d2",

     

       349
       349
       +
           "eyr" => "1925",

     

       350
       350
       +
           "hcl" => "z",

     

       351
       351
       +
           "hgt" => "59cm",

     

       352
       352
       +
           "iyr" => "2030",

     

       353
       353
       +
           "pid" => "#02ee78"

     

       354
       354
       +
         },

     

       355
       355
       +
         %{

     

       356
       356
       +
           "byr" => "1995",

     

       357
       357
       +
           "cid" => "169",

     

       358
       358
       +
           "ecl" => "gry",

     

       359
       359
       +
           "eyr" => "2024",

     

       360
       360
       +
           "hcl" => "#888785",

     

       361
       361
       +
           "hgt" => "162cm",

     

       362
       362
       +
           "iyr" => "2013",

     

       363
       363
       +
           "pid" => "742658992"

     

       364
       364
       +
         },

     

       365
       365
       +
         %{

     

       366
       366
       +
           "byr" => "1946",

     

       367
       367
       +
           "cid" => "71",

     

       368
       368
       +
           "ecl" => "amb",

     

       369
       369
       +
           "eyr" => "2027",

     

       370
       370
       +
           "hcl" => "#238da0",

     

       371
       371
       +
           "hgt" => "152cm",

     

       372
       372
       +
           "iyr" => "2018",

     

       373
       373
       +
           "pid" => "352799678"

     

       374
       374
       +
         },

     

       375
       375
       +
         %{

     

       376
       376
       +
           "byr" => "1926",

     

       377
       377
       +
           "ecl" => "grn",

     

       378
       378
       +
           "eyr" => "2021",

     

       379
       379
       +
           "hcl" => "#623a2f",

     

       380
       380
       +
           "hgt" => "172cm",

     

       381
       381
       +
           "iyr" => "2013",

     

       382
       382
       +
           "pid" => "723616064"

     

       383
       383
       +
         },

     

       384
       384
       +
         %{"byr" => "2028", "eyr" => "1986", "hgt" => "94", "iyr" => "2019", "pid" => "#ee7f00"},

     

       385
       385
       +
         %{

     

       386
       386
       +
           "byr" => "1957",

     

       387
       387
       +
           "ecl" => "amb",

     

       388
       388
       +
           "eyr" => "2027",

     

       389
       389
       +
           "hcl" => "#d67ae1",

     

       390
       390
       +
           "hgt" => "183cm",

     

       391
       391
       +
           "iyr" => "2011",

     

       392
       392
       +
           "pid" => "188153423"

     

       393
       393
       +
         },

     

       394
       394
       +
         %{

     

       395
       395
       +
           "byr" => "1950",

     

       396
       396
       +
           "ecl" => "#e2495d",

     

       397
       397
       +
           "eyr" => "2034",

     

       398
       398
       +
           "hgt" => "166cm",

     

       399
       399
       +
           "iyr" => "2010",

     

       400
       400
       +
           "pid" => "151457075"

     

       401
       401
       +
         },

     

       402
       402
       +
         %{

     

       403
       403
       +
           "byr" => "2016",

     

       404
       404
       +
           "ecl" => "#55c2a4",

     

       405
       405
       +
           "eyr" => "1981",

     

       406
       406
       +
           "hcl" => "z",

     

       407
       407
       +
           "hgt" => "76cm",

     

       408
       408
       +
           "iyr" => "2029",

     

       409
       409
       +
           "pid" => "153cm"

     

       410
       410
       +
         },

     

       411
       411
       +
         %{

     

       412
       412
       +
           "byr" => "2002",

     

       413
       413
       +
           "ecl" => "amb",

     

       414
       414
       +
           "eyr" => "2021",

     

       415
       415
       +
           "hcl" => "#623a2f",

     

       416
       416
       +
           "hgt" => "184cm",

     

       417
       417
       +
           "iyr" => "1960",

     

       418
       418
       +
           ...

     

       419
       419
       +
         },

     

       420
       420
       +
         %{"byr" => "1991", "ecl" => "blu", "eyr" => "2027", "hgt" => "179cm", "iyr" => "2020", ...},

     

       421
       421
       +
         %{"byr" => "1950", "ecl" => "grn", "eyr" => "2027", "hcl" => "#a97842", ...},

     

       422
       422
       +
         %{"byr" => "1930", "ecl" => "oth", "eyr" => "2028", ...},

     

       423
       423
       +
         %{"byr" => "1960", "ecl" => "amb", ...},

     

       424
       424
       +
         %{"byr" => "1922", ...},

     

       425
       425
       +
         %{...},

     

       426
       426
       +
         ...

     

       427
       427
       +
       ]

     

       428
       428
       +
       ```

     

       429
       429
       +
       

     

       430
       430
       +
       ## Part 1

     

       431
       431
       +
       

     

       432
       432
       +
       ```elixir

     

       433
       433
       +
       Enum.count(passports, fn passport ->

     

       434
       434
       +
         required = ~w[byr iyr eyr hgt hcl ecl pid]

     

       435
       435
       +
         keys = Map.keys(passport)

     

       436
       436
       +
       

     

       437
       437
       +
         Enum.all?(required, & &1 in keys)

     

       438
       438
       +
       end)

     

       439
       439
       +
       ```

     

       440
       440
       +
       

     

       441
       441
       +
       <!-- livebook:{"output":true} -->

     

       442
       442
       +
       

     

       443
       443
       +
       ```

     

       444
       444
       +
       196

     

       445
       445
       +
       ```

     

       446
       446
       +
       

     

       447
       447
       +
       ## Part 2

     

       448
       448
       +
       

     

       449
       449
       +
       ```elixir

     

       450
       450
       +
       defmodule Part2 do

     

       451
       451
       +
         def valid?(passport) do

     

       452
       452
       +
           [

     

       453
       453
       +
             year(passport["byr"]) in 1920..2002,

     

       454
       454
       +
             year(passport["iyr"]) in 2010..2020,

     

       455
       455
       +
             year(passport["eyr"]) in 2020..2030,

     

       456
       456
       +
             case hgt(passport["hgt"]) do

     

       457
       457
       +
               {cm, "cm"} -> cm in 150..193

     

       458
       458
       +
               {i, "in"} -> i in 59..79

     

       459
       459
       +
               _ -> false

     

       460
       460
       +
             end,

     

       461
       461
       +
             Map.get(passport, "hcl", "") =~ ~r/^#[0-9a-f]{6}$/,

     

       462
       462
       +
             passport["ecl"] in ~w[amb blu brn gry grn hzl oth],

     

       463
       463
       +
             Map.get(passport, "pid", "") =~ ~r/^\d{9}$/

     

       464
       464
       +
           ]

     

       465
       465
       +
           |> Enum.all?()

     

       466
       466
       +
         end

     

       467
       467
       +
       

     

       468
       468
       +
         defp year(nil), do: false

     

       469
       469
       +
         defp year(y), do: elem(Integer.parse(y), 0)

     

       470
       470
       +
       

     

       471
       471
       +
         defp hgt(nil), do: false

     

       472
       472
       +
         defp hgt(h), do: Integer.parse(h)

     

       473
       473
       +
       end

     

       474
       474
       +
       

     

       475
       475
       +
       Enum.count(passports, &Part2.valid?/1)

     

       476
       476
       +
       ```

     

       477
       477
       +
       

     

       478
       478
       +
       <!-- livebook:{"output":true} -->

     

       479
       479
       +
       

     

       480
       480
       +
       ```

     

       481
       481
       +
       114

     

       482
       482
       +
       ```

     

       483
       483
       +
       

     

       484
       484
       +
       <!-- livebook:{"offset":13532,"stamp":{"token":"XCP.TTqFDnEDh1KcybgE2cRzHx79CkCBOfAe1WwEG3cX7vDTkxtUF55KF32ZCFPKqMdo3PkrQc384TMNDJTmch-aqQHkit7xUcJ8qMXwA33agDM5wcdBmkMyp1XHIbZz4GZrr3w","version":2}} -->

+105

2020/day05.livemd

···

       1
       1
       +
       <!-- livebook:{"persist_outputs":true} -->

     

       2
       2
       +
       

     

       3
       3
       +
       # Day 05

     

       4
       4
       +
       

     

       5
       5
       +
       ```elixir

     

       6
       6
       +
       Mix.install([:kino_aoc])

     

       7
       7
       +
       ```

     

       8
       8
       +
       

     

       9
       9
       +
       ## Section

     

       10
       10
       +
       

     

       11
       11
       +
       <!-- livebook:{"attrs":"eyJhc3NpZ25fdG8iOiJwdXp6bGVfaW5wdXQiLCJkYXkiOiI1Iiwic2Vzc2lvbl9zZWNyZXQiOiJBRFZFTlRfT0ZfQ09ERV9TRVNTSU9OIiwieWVhciI6IjIwMjAifQ","chunks":null,"kind":"Elixir.KinoAOC.HelperCell","livebook_object":"smart_cell"} -->

     

       12
       12
       +
       

     

       13
       13
       +
       ```elixir

     

       14
       14
       +
       {:ok, puzzle_input} =

     

       15
       15
       +
         KinoAOC.download_puzzle("2020", "5", System.fetch_env!("LB_ADVENT_OF_CODE_SESSION"))

     

       16
       16
       +
       ```

     

       17
       17
       +
       

     

       18
       18
       +
       <!-- livebook:{"output":true} -->

     

       19
       19
       +
       

     

       20
       20
       +
       ```

     

       21
       21
       +
       {:ok,

     

       22
       22
       +
        "FFBBFFFLRL\nFFBBFBBRRL\nFBBBFFBLRL\nBBFBFFBLRR\nBFBBBFFLLL\nBFBBBBBLLR\nFBFBFBFLLR\nBFBFBBFLLR\nFBBFBFBLLL\nBBBFBFBRLL\nBFBBBFBLRL\nFBBFFFBLLR\nBFFBFBFLRL\nFBBBBFBRLR\nFFBBBBBRRL\nFBBFBFFLRL\nFBBBBBBLLR\nFBBFBBBRRL\nFBBFFBFRLL\nFBFBBBBRRR\nBFFBFBFRRL\nBFBFBBBLLR\nFFFFBFBLRL\nFBFFBFFLRL\nFFBFBBBRRR\nFFBFFFFLRR\nFBBBFFFLLR\nFFFFFBFLLL\nBFFFFFFLRL\nFBBBBBFRLR\nBBBFFBBRRR\nFFFFBBBRLL\nFBFFBBBRLR\nBFBBBFFRRL\nBBFBBFBLRL\nBFBFBFFRRR\nBBFBFFFLLL\nFBFBFBFRRR\nBFBFBFFRRL\nBBFBBFBRRL\nFFBBFBFLRL\nFBFFFFFRLR\nFBBFFFBLLL\nFBBBBFFRLL\nFFBBBBBLLL\nBFFBBFFRLR\nFFFBBFBRRR\nFBBBFFFRLL\nFFFBFBFLRL\nBFFBBFFLRL\nBFBBBBBLRL\nBFFFFFBRRR\nFFFBBFBLRL\nFBBBFBFRLL\nFBBFBFBLRR\nBBFBBFFLRR\nFBFFBBFLLL\nFFFFFBBRLL\nFFBBFFBRLR\nBBFFFFFLLL\nBFFFFBFLRR\nFBFBBFFRRL\nBFBFFBBLLR\nFBBBFBBRLR\nBBBFBFFRLL\nBBFFBBFRLR\nFFBFFBBRLR\nFFBBBFBRLR\nBBBFFFBLRR\nBBFBFBFLRR\nBFBBBBBRLR\nBFFFFFBLLR\nFBFFBFFRLL\nBBBFFBBRLR\nFFBBBFBRRR\nBFBBBFBRLR\nFBFFFBBLRL\nFFFBFFFRLL\nBBFFBFFLLL\nBFFBBFFRRR\nFFBFBFBRRL\nFFBBBFBRRL\nFBBFFBBRLR\nFBFFBBFRLR\nBFBFFBBRRR\nBBFBFBBRLR\nFFBFFFFRRL\nBBFFBFFLLR\nFBBFBFBRRR\nBFBFBBBRRL\nFBFBFFBRRL\nFFFBBFFRLL\nBFBFFFFRRR\nFBBFFBFLLR\nFFBFBFFRLL\nFBFFBFBLLL\nFBFBFFFLRL\nBBFFFFFRRR\nFBFFBBFLRR\nFBFFFBFLRL\nFBBBFBBRRL\nBFFBFFFRLR\nFFBBBBFLLR\nBFFFFBFLRL\nBFFBFFBRRR\nFFBFBFBLRL\nBBFFFBBRLL\nFFBFBBFRRR\nFFFBFBFRRL\nFBFFBFBRRR\nFBBBBFBRRL\nFBFFFFFLLR\nFFBFFFFLLR\nFBBBBFFRLR\nBBBFFBBLRR\nBBBFFBFLRR\nFBBFBBBLRR\nFBBFBBFRRL\nFFFBFFBLLL\nFBFFFFBLLL\nBBFFFFBLLL\nFBFFFBFLRR\nFFBFBFFLRR\nBBFBFFFRLL\nFFFBBBFRLR\nFFBFFBBRLL\nBBBFBFFRRL\nBFFBBBBLRR\nBFFFFFFLLL\nBBBFFFBLLL\nFBBBBBFRLL\nFBBFBBBLLR\nBBFBFFFRRR\nBBFFFBBLLL\nFBBFFBFLRL\nBBFBFFFLRR\nBFBFFBFRLL\nBFFFBFBLLR\nBBBFBFBLLL\nBBBFFBFRLR\nFBFFBFBRLR\nBFBBFFFLLL\nBBFFFFBLRR\nBBFFFBBRRL\nBBBFBFFLLL\nBFBFFBFLLL\nFBBBBFFLLR\nFFBFFFFRLR\nFFBBBFBRLL\nBFFFFFFRRL\nBFBFFBBLRL\nBBFBBBFRLL\nBFFFBFFLLR\nBBFBFFBRLL\nBFBBFFFRLL\nBBFBBFBRLR\nFFFBBFBRLR\nBFFFBBFLRL\nFFBFFBFRLL\nFFFBFFBLRL\nBFBBBFFRLR\nBBBFFBBLRL\nBFFBBBBRRL\nFFBBFFFRLL\nBFBFFBFLRL\nBFFBBBBRRR\nBBFBFBFRRL\nBBBFFBFRRL\nBFFFBFBLRL\nFFFBFBFRLR\nFBFFBBBLRR\nFFFFBBBLLL\nBBBFBBFLLR\nBFFBFBFRRR\nBFBFFFBRRR\nBBFBBBBLLR\nFFBBBBBLRL\nFFBFFBFLRR\nFFBBBFBLRR\nBBFBBFBRRR\nFFFFFFBRRR\nBFBFBFBRRL\nBBFFBBBLRR\nBBFBFFFRLR\nFBBFBFBLLR\nBFBBFFBRLL\nFFFFBFBLLR\nBFBFFBBRLR\nFBFFFBFRRR\nBFFBFFFRLL\nFBBBFFFRRR\nFFFBBBFLLL\nFBBBBBBRRL\nFBBFFBBLLR\nBBBFBFFLRR\nBFBBFBFLRR\nFFFBBBBRRR\nBFFFBBFRLR\nFBFFBBFLLR\nFBFFFFFRRL\nBBBFBBFLLL\nBBBFFFFRLR\nFFFFBBBRRR\nFBBBFBBLLL\nBFFBFFBLLL\nFBFBBFBRLR\nFFBFFBBLLR\nFFFFBFFLRR\nFBBFFBFLLL\nFBFBBFBRRR\nBBBFBFBLLR\nBBFFBFBLLL\nFFBFFBFRLR\nFBBBFBBLRR\nBBFBBFBLLL\nFFBFFBFRRR\nFBBBBFFLRL\nBFBBFBFLLR\nFBFBBBFRLR\nBFBBFFBLLR\nFFFBBBFLLR\nFFFBBBFRRL\nBFFFBFBRLR\nBBBFBBFLRR\nBBFBBFFLLR\nBBFBBBBRLR\nFBBFFFFLRR\nFBFBBFFRLL\nFFBFFFFRRR\nFFFBBFFRRL\nFFFBBFBRRL\nFFFBFBFLLR\nFFBBBBFRRR\nBFFFFBBRRL\nBFFFFBFRRR\nBFBBBFBLRR\nFFBBFFFRRL\nFBBBBBBRRR\nBBFBFFBLLR\nFBFFFFBRLL\nBFBBFBFLLL\nFBFFFBBRLL\nFBBBFFBLLR\nBBFBBBFRLR\nFBFBBFBLRR\nFFFFFBFLLR\nFBFBBBFLRL\nFFBFFFBRRR\nFFFBBFFLRL\nBBBFFFFLLR\nBFBFFFFRRL\nFBFBFBBLLR\nFBBBFBFRRL\nBBFBBBBRRL\nBFBBFBFLRL\nBFFBBFFLLR\nBFBFFBBRLL\nFBFFBFFRLR\nFBFBFBFLRR\nBFBFBBFRRR\nFBBBBFBLRL\nFFBBBFFRRR\nFFBBFFBRLL\nFFBBBBBRLL\nFBFFFBFRRL\nFFFBBBFLRL\nBBBFBFFRRR\nFFFBFFFRRR\nFBFFBFFLLL\nFFBBFFBRRL\nBFFBFFBRRL\nFFBBBFFRLR\nBBBFFFFRRR\nBBFBFBBRRR\nFBFBBBBLRR\nBFBFBFBLLL\nFFBBFFBLLR\nBFFFBBBRLR\nBFBBFBBRLR\nBFFFFBBLLR\nFBFBFBBRLR\nBFFBBBFLLR\nFBFFBFBLRL\nBFBFBBBRLL\nBFBBBFFLRL\nFFFBFFFLRR\nBFFBBFBRLL\nFFBBBBFRLL\nBBFFFBBLLR\nFBFBFBFRLR\nBBBFFFBRLR\nBFFFFFBRLR\nBBBFFFFLLL\nFFFBBFBRLL\nBFFFFFBRRL\nFBFFBBBRRL\nFBFBFBBLLL\nFBFBBFBRRL\nFBBFBBBRRR\nBFBFFBBRRL\nFBBBBFBLLL\nFBBBBBBRLR\nBBFFFBFRRL\nFFFFBFBLLL\nFFFFBBFLRR\nFFFFBFFLRL\nBFFFBBFRLL\nBBFFFFBRRR\nBFBFFFFRLL\nBFFFFBFLLR\nBBBFFBBRRL\nBBFBBFBLLR\nBFFFFBFRLR\nFBBBFBFLLR\nFFFFFBBLRR\nBFBFFFFLRR\nFBFBBFFLRL\nFBFFFBBRRR\nBBFBBBFLRL\nBFBBBFFLLR\nBFBFBBFRRL\nFBFFFFBLRL\nFBBFBFFRLR\nBFBFBBBLRR\nBFBFBBFLRL\nBBFFBFFRLL\nFBFFBBBLRL\nBFBFBFFLLR\nFFFBFFBLLR\nFFFBFBBRRR\nBBFBFFFLLR\nFBBBFBFRLR\nFBFFBBBLLL\nFFBFBBFLRR\nFBFBFFFLLL\nBBFFFFFLRL\nFBFBBFBLRL\nBBFFFBFLLR\nBBFBBBBRRR\nBFBBBFFRRR\nFFFBFFBRLL\nFBBBFFFRLR\nBBBFBFBLRL\nFBFFFFBRLR\nBFFFFFBLLL\nFBFFFFBLLR\nBFBBFFBLRR\nBFBFBBBRRR\nBBBFBFBRRR\nFFFBBFFRRR\nFBBBFFFLRR\nBBFBFFFRRL\nBFBFBBFRLR\nBFFFBFBRLL\nFBFFFFFLLL\nFFFBBBBLRL\nFFFBBFFLLL\nFBFFFFBRRR\nFFBFBFBRLR\nBFBFFFBLRR\nBFFFBFBLLL\nFBBFBFFRLL\nFBFBFFFRLL\nFBBBFFBRRR\nFBBBFFBRLL\nFFBBFBBLLL\nFBBBBFBRRR\nBFBBBFBLLR\nFBBBBBFLLR\nFFBBFBFLRR\nBFFBBFBLLR\nFBFFFFBLRR\nBFFB" <> ...}

     

       23
       23
       +
       ```

     

       24
       24
       +
       

     

       25
       25
       +
       ```elixir

     

       26
       26
       +
       seats =

     

       27
       27
       +
         puzzle_input

     

       28
       28
       +
         |> String.split("\n", trim: true)

     

       29
       29
       +
       ```

     

       30
       30
       +
       

     

       31
       31
       +
       <!-- livebook:{"output":true} -->

     

       32
       32
       +
       

     

       33
       33
       +
       ```

     

       34
       34
       +
       ["FFBBFFFLRL", "FFBBFBBRRL", "FBBBFFBLRL", "BBFBFFBLRR", "BFBBBFFLLL", "BFBBBBBLLR", "FBFBFBFLLR",

     

       35
       35
       +
        "BFBFBBFLLR", "FBBFBFBLLL", "BBBFBFBRLL", "BFBBBFBLRL", "FBBFFFBLLR", "BFFBFBFLRL", "FBBBBFBRLR",

     

       36
       36
       +
        "FFBBBBBRRL", "FBBFBFFLRL", "FBBBBBBLLR", "FBBFBBBRRL", "FBBFFBFRLL", "FBFBBBBRRR", "BFFBFBFRRL",

     

       37
       37
       +
        "BFBFBBBLLR", "FFFFBFBLRL", "FBFFBFFLRL", "FFBFBBBRRR", "FFBFFFFLRR", "FBBBFFFLLR", "FFFFFBFLLL",

     

       38
       38
       +
        "BFFFFFFLRL", "FBBBBBFRLR", "BBBFFBBRRR", "FFFFBBBRLL", "FBFFBBBRLR", "BFBBBFFRRL", "BBFBBFBLRL",

     

       39
       39
       +
        "BFBFBFFRRR", "BBFBFFFLLL", "FBFBFBFRRR", "BFBFBFFRRL", "BBFBBFBRRL", "FFBBFBFLRL", "FBFFFFFRLR",

     

       40
       40
       +
        "FBBFFFBLLL", "FBBBBFFRLL", "FFBBBBBLLL", "BFFBBFFRLR", "FFFBBFBRRR", "FBBBFFFRLL", "FFFBFBFLRL",

     

       41
       41
       +
        "BFFBBFFLRL", ...]

     

       42
       42
       +
       ```

     

       43
       43
       +
       

     

       44
       44
       +
       ```elixir

     

       45
       45
       +
       defmodule Plane do

     

       46
       46
       +
         def lookup(<<>>, _directions, pos, 1), do: pos

     

       47
       47
       +
       

     

       48
       48
       +
         def lookup(<<curr>> <> rest, d, first, dist) do

     

       49
       49
       +
           dist = div(dist, 2)

     

       50
       50
       +
       

     

       51
       51
       +
           {nf, nl} =

     

       52
       52
       +
             if curr == d do

     

       53
       53
       +
               {first, dist}

     

       54
       54
       +
             else

     

       55
       55
       +
               {first + dist, dist}

     

       56
       56
       +
             end

     

       57
       57
       +
       

     

       58
       58
       +
           lookup(rest, d, nf, nl)

     

       59
       59
       +
         end

     

       60
       60
       +
       

     

       61
       61
       +
         def seat_no(id) do

     

       62
       62
       +
           {row, col} = String.split_at(id, 7)

     

       63
       63
       +
       

     

       64
       64
       +
           lookup(row, ?F, 0, 128) * 8 + lookup(col, ?L, 0, 8)

     

       65
       65
       +
         end

     

       66
       66
       +
       end

     

       67
       67
       +
       ```

     

       68
       68
       +
       

     

       69
       69
       +
       <!-- livebook:{"output":true} -->

     

       70
       70
       +
       

     

       71
       71
       +
       ```

     

       72
       72
       +
       {:module, Plane, <<70, 79, 82, 49, 0, 0, 9, ...>>, {:seat_no, 1}}

     

       73
       73
       +
       ```

     

       74
       74
       +
       

     

       75
       75
       +
       ## Part 1

     

       76
       76
       +
       

     

       77
       77
       +
       ```elixir

     

       78
       78
       +
       seats

     

       79
       79
       +
       |> Enum.map(&Plane.seat_no/1)

     

       80
       80
       +
       |> Enum.max()

     

       81
       81
       +
       ```

     

       82
       82
       +
       

     

       83
       83
       +
       <!-- livebook:{"output":true} -->

     

       84
       84
       +
       

     

       85
       85
       +
       ```

     

       86
       86
       +
       947

     

       87
       87
       +
       ```

     

       88
       88
       +
       

     

       89
       89
       +
       ## Part 2

     

       90
       90
       +
       

     

       91
       91
       +
       ```elixir

     

       92
       92
       +
       seats

     

       93
       93
       +
       |> Enum.sort()

     

       94
       94
       +
       |> Enum.map(&Plane.seat_no/1)

     

       95
       95
       +
       |> Enum.chunk_every(2, 1)

     

       96
       96
       +
       |> Enum.find_value(fn [a, b] -> if b == a + 2, do: a + 1 end)

     

       97
       97
       +
       ```

     

       98
       98
       +
       

     

       99
       99
       +
       <!-- livebook:{"output":true} -->

     

       100
       100
       +
       

     

       101
       101
       +
       ```

     

       102
       102
       +
       636

     

       103
       103
       +
       ```

     

       104
       104
       +
       

     

       105
       105
       +
       <!-- livebook:{"offset":6707,"stamp":{"token":"XCP.jyVZ5mT4Eh93IIpxW_8l2Aemq91Tmk8CIwY-V3Z73RF3Qd7Yjct-IMJBfvB57vM_l06YF1tv55dZ73nE8aLIHN4OMmL-3l-vRTpT0Qs7Ks6Oc5tQDm2ynrANEp8xknTW7O4","version":2}} -->