Advent of Code 2015 - Day 2

Mix.install([
  {:kino, "~> 0.14.2"},
  {:kino_vega_lite, "~> 0.1.13"},
  {:kino_explorer, "~> 0.1.23"}
])

Puzzle Input

puzzle_input = Kino.Input.textarea("Please paste the puzzle input:")

Part 1

part_1_test_input = Kino.Input.textarea("Please paste test input for part 1:")

part_1_test_input
|> Kino.Input.read()
|> String.split("x")
|> Enum.map(&String.to_integer/1)
|> then(fn [l, w, h] ->
  sides = [l * w, w * h, h * l]
  Enum.sum(sides) * 2 + Enum.min(sides)
end)

puzzle_input
|> Kino.Input.read()
|> String.split("\n")
|> Enum.map(fn dimensions ->
  dimensions
  |> String.split("x")
  |> Enum.map(&String.to_integer/1)
  |> then(fn [l, w, h] ->
    sides = [l * w, w * h, h * l]
    Enum.sum(sides) * 2 + Enum.min(sides)
  end)
end)
|> Enum.sum()

Part 2

part_2_test_input = Kino.Input.textarea("Please paste the test input for part 2:")

part_2_test_input
|> Kino.Input.read()
|> String.split("x")
|> Enum.map(&String.to_integer/1)
|> then(fn dimensions ->
  wrapping_ribbon =
    dimensions
    |> Enum.sort()
    |> Enum.take(2)
    |> List.duplicate(2)
    |> List.flatten()
    |> Enum.sum()

  bow_ribbon = Enum.product(dimensions)
  wrapping_ribbon + bow_ribbon
end)

puzzle_input
|> Kino.Input.read()
|> String.split("\n")
|> Enum.map(fn dimensions ->
  dimensions =
    dimensions
    |> String.split("x")
    |> Enum.map(&String.to_integer/1)

  wrapping_ribbon =
    dimensions
    |> Enum.sort()
    |> Enum.take(2)
    |> List.duplicate(2)
    |> List.flatten()
    |> Enum.sum()

  bow_ribbon = Enum.product(dimensions)
  wrapping_ribbon + bow_ribbon
end)
|> Enum.sum()