Advent of Code 2024 Day 1 Part 2

Mix.install([
  {:kino_aoc, "~> 0.1"}
])

Get Inputs

{:ok, puzzle_input} =
  KinoAOC.download_puzzle("2024", "1", System.fetch_env!("LB_SESSION"))

My answer

{left_list, right_list} =
  puzzle_input
  |> String.split("\n")
  |> Enum.map(fn row ->
    row
    |> String.split(" ")
    |> Enum.filter(&(&1 != ""))
    |> Enum.map(&String.to_integer(&1))
  end)
  |> Enum.map(fn [a, b] -> {a, b} end)
  |> Enum.unzip()

left_list
|> Enum.map(fn left ->
  left * Enum.count(right_list, fn right -> left == right end)
end)
|> Enum.sum()