88 lines
1.2 KiB
Plaintext
88 lines
1.2 KiB
Plaintext
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<!-- livebook:{"persist_outputs":true} -->
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# Advent of Code 2022
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```elixir
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defmodule AoC do
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def input_file_contents(n), do: File.read!(Path.expand("~/.cache/aoc2022/#{n}.input"))
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end
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import Enum
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```
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<!-- livebook:{"output":true} -->
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```
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Enum
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```
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## Day 1
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```elixir
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calories =
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AoC.input_file_contents(1)
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|> String.split("\n")
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|> reduce([0], fn
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"", l -> [0 | l]
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s, [n | l] -> [n + String.to_integer(s) | l]
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end)
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|> sort()
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|> reverse()
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IO.puts("Part 1: #{hd(calories)}")
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IO.puts("Part 2: #{Enum.take(calories, 3) |> Enum.sum()}")
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```
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<!-- livebook:{"output":true} -->
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```
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Part 1: 71924
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Part 2: 210406
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```
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<!-- livebook:{"output":true} -->
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```
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:ok
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```
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## Day 2
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```elixir
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m = %{
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0 => %{0 => 4, 1 => 8, 2 => 3},
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1 => %{0 => 1, 1 => 5, 2 => 9},
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2 => %{0 => 7, 1 => 2, 2 => 6}
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}
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points = fn
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<<a, _, b, 0x0A, rest::binary>>, {p1, p2}, r ->
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{y, x} = {a - 65, b - 88}
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r.(rest, {p1 + m[y][x], p2 + m[y][rem(3 + x + y - 1, 3)]}, r)
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_, {p1, p2}, _ ->
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{p1, p2}
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end
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{p1, p2} =
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2
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|> AoC.input_file_contents()
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|> points.({0, 0}, points)
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IO.puts("Part 1: #{p1}")
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IO.puts("Part 2: #{p2}")
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```
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<!-- livebook:{"output":true} -->
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```
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Part 1: 12535
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Part 2: 15457
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```
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<!-- livebook:{"output":true} -->
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```
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:ok
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```
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