Advent of Code 2024 - Day 24

bjorng · December 25, 2024, 9:54am

Here is my cleaned up solution.

For some reason, the runtimes fluctuate wildly, but it usually finished in 2 through 4 seconds.

bjorng/advent-of-code/blob/main/2024/day24/lib/day24.ex

defmodule Day24 do
  import Bitwise

  def part1(input) do
    {values, gates} = parse(input)

    gates = Enum.map(gates, fn {dst, {op, src1, src2}} ->
      op = case op do
             :"AND" -> &band/2
             :"OR" -> &bor/2
             :"XOR" -> &bxor/2
           end
      {dst, {op, src1, src2}}
    end)

    values = Map.new(values)

    outputs(gates, values, &next_item_part1/1)
    |> Enum.map(fn pair ->
      case pair do

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