Day 06

Mix.install([:kino_aoc])

Setup

{:ok, puzzle_input} =
  KinoAOC.download_puzzle("2025", "6", System.fetch_env!("LB_ADVENT_OF_CODE_SESSION"))

{tasks, [ops]} =
  puzzle_input
  |> String.split("\n", trim: true)
  |> Enum.split(-1)

ops =
  ops
  |> String.split()
  |> Enum.map(&String.to_atom/1)

Part 1

tasks
|> Enum.map(&String.split/1)
|> Enum.zip_with(fn numbers -> Enum.map(numbers, &String.to_integer/1) end)
|> Enum.zip(ops)
|> Enum.sum_by(fn
  {nums, :+} -> Enum.sum(nums)
  {nums, :*} -> Enum.product(nums)
end)

Part 2

tasks
|> Enum.map(&String.to_charlist/1)
|> Enum.zip_with(&(&1 |> List.to_string() |> String.trim()))
|> Enum.chunk_while(
  [],
  fn
    "", acc -> {:cont, acc, []}
    num, acc -> {:cont, [String.to_integer(num) | acc]}
  end,
  &{:cont, &1, []}
)
|> Enum.zip(ops)
|> Enum.sum_by(fn
  {nums, :+} -> Enum.sum(nums)
  {nums, :*} -> Enum.product(nums)
end)