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2025/day02.livemd

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       |> Enum.sum()

     

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       ```

     

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       |> Enum.sum()

     

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2025/day03.livemd

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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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       ```elixir

     

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       {:ok, puzzle_input} =

     

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         KinoAOC.download_puzzle("2025", "3", System.fetch_env!("LB_ADVENT_OF_CODE_SESSION"))

     

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       ```

     

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       ```elixir

     

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       batteries =

     

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         puzzle_input

     

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

     

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         |> Enum.map(fn row ->

     

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           row

     

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           |> String.to_charlist()

     

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           |> Enum.map(& &1 - ?0)

     

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         end)

     

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       ```

     

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       ```elixir

     

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       defmodule Joltage do

     

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         def make_largest(list, n) do

     

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           to_remove = length(list) - n

     

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           Enum.reduce(1..to_remove, list, fn _, acc -> make_larger(acc) end)

     

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         end

     

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         def make_larger([_]), do: []

     

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         def make_larger([a, b | rest]) when a < b, do: [b | rest]

     

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         def make_larger([b | rest]), do: [b | make_larger(rest)]

     

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       end

     

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       ```

     

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       ## Part 1

     

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       ```elixir

     

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       Enum.sum_by(batteries, &Integer.undigits(Joltage.make_largest(&1, 2)))

     

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       ```

     

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       ## Part 2

     

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       ```elixir

     

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       Enum.sum_by(batteries, &Integer.undigits(Joltage.make_largest(&1, 12)))

     

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       ```

     

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