Day 1

Mix.install([{:kino, github: "livebook-dev/kino"}])

Section

input = Kino.Input.textarea("Input file")

Part 1

input
|> Kino.Input.read()
|> String.split("\n\n", trim: true)
|> Enum.map(fn elem ->
  elem
  |> String.split("\n", trim: true)
  |> Enum.map(&String.to_integer/1)
  |> Enum.reduce(fn val, acc -> acc + val end)
end)
|> Enum.max()

Part 2

input
|> Kino.Input.read()
|> String.split("\n\n", trim: true)
|> Enum.map(fn elem ->
  elem
  |> String.split("\n", trim: true)
  |> Enum.map(&String.to_integer/1)
  |> Enum.reduce(fn val, acc -> acc + val end)
end)
|> Enum.sort(&(&1 >= &2))
|> Enum.take(3)
|> Enum.sum()