Cata 1

Mix.install([
  {:kino, "<= 1.0.0"}
])

First Part

The objective is to solve the first challenge of the advent of code 2021

raw = Kino.Input.textarea("Input goes here:")

Kino.Input.read(raw)
|> String.split("\n", trim: true)
|> Enum.map(&String.to_integer/1)
|> Enum.chunk_every(2, 1, :discard)
|> Enum.count(fn [left, right] -> right > left end)

Second Part

raw = Kino.Input.textarea("Input goes here:")

Kino.Input.read(raw)
|> String.split("\n", trim: true)
|> Enum.map(&String.to_integer/1)
|> Enum.chunk_every(3, 1, :discard)
|> Enum.chunk_every(2)
|> Enum.map(fn [left, right] -> [Enum.sum(left), Enum.sum(right)] end)
|> List.flatten()
|> Enum.chunk_every(2, 1, :discard)
|> Enum.count(fn [left, right] -> right > left end)

# IO.inspect(data)