<!-- livebook:{"file_entries":[{"name":"04.txt","type":"attachment"}]} --> # Advent of Code 2023 - Day 15 ```elixir Mix.install([ {:kino, "~> 0.11.0"}, {:kino_aoc, github: "ljgago/kino_aoc"} ]) ``` ## Input <!-- livebook:{"attrs":{"assign_to":"puzzle_input","day":"15","session_secret":"AOC_SESSION","year":"2023"},"chunks":null,"kind":"Elixir.KinoAOC.HelperCell","livebook_object":"smart_cell"} --> ```elixir {:ok, puzzle_input} = KinoAOC.download_puzzle("2023", "15", System.fetch_env!("LB_AOC_SESSION")) ``` ```elixir input = puzzle_input |> String.split(",", trim: true) |> Enum.map(&String.to_charlist/1) ``` ## Part 1 ```elixir hash = fn chars -> Enum.reduce(chars, 0, fn c, acc -> acc |> Kernel.+(c) |> Kernel.*(17) |> Kernel.rem(256) end) end input |> Stream.map(hash) |> Enum.sum() ``` ## Part 2 ```elixir ``` [](https://livebook.dev/run?url=https%3A%2F%2Fgithub.com%2Fpehbehbeh%2Fadventofcode%2Fblob%2Fmain%2F2023%2F15.livemd) <!-- livebook:{"offset":1040,"stamp":{"token":"XCP.CsfnCV1xSiOM3gpBGjly_tJEmM0OvK0OmRjy8tY2I8r-1ARnsRqQYpd_aDW1RZ15GRq2qG1yIz3XS3MNdaUNmac-k0P3-cN_eXPPkcwi2ut-aOlmOGI","version":2}} -->