Advent of Code 2024/1

Mix.install([
  {:kino, "~> 0.14.2"}
])

Section

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

defmodule AoC2024_1 do
  def parse(input) do
    Kino.Input.read(input)
    |> String.split("\n", trim: true)
    |> Enum.map(fn part -> String.split(part, " ", trim: true) |> Enum.map(fn item -> String.to_integer(item) end) end)
    |> Enum.zip
  end

  def part_1(input) do
    input 
    |> parse 
    |> Enum.map(fn list -> list |> Tuple.to_list() |> Enum.sort() end)
    |> Enum.zip_reduce([], fn [one, two], acc -> acc ++ [abs(one - two)] end) 
    |> Enum.sum
  end

  def part_2(input) do
    parsed = input 
    |> parse
    |> Enum.map(fn list -> list |> Tuple.to_list() end)

    parsed
    |> Enum.at(0)
    |> Enum.map(fn e -> e * Enum.count(Enum.at(parsed, 1), fn e2 -> e2 == e end) end) 
    |> Enum.sum
  end
end

AoC2024_1.part_1(input)

AoC2024_1.part_2(input)