Advent 2021 - Day 1
Setup
Mix.install([
{:kino, github: "livebook-dev/kino"}
])
input = Kino.Input.textarea("Please paste your input file:")
input =
input
|> Kino.Input.read()
|> String.trim()
|> String.split("\n")
|> Enum.map(&String.to_integer/1)
Part 1
input
|> Enum.chunk_every(2, 1, :discard)
|> Enum.map(fn [x, y] -> y - x end)
|> Enum.count(fn x -> x > 0 end)
Part 2
input
|> Enum.chunk_every(3, 1, :discard)
|> Enum.map(fn list -> Enum.sum(list) end)
|> Enum.chunk_every(2, 1, :discard)
|> Enum.map(fn [x, y] -> y - x end)
|> Enum.count(fn x -> x > 0 end)