Advent of Code 2022 - Day 02

Mix.install([
  {:kino, "~> 0.7.0"}
])

Setup

example_input = """
A Y
B X
C Z
"""

input = Kino.Input.textarea("Puzzle Input", default: example_input)

Part 1

input
|> Kino.Input.read()
|> String.split("\n", trim: true)
|> Enum.map(&String.split(&1, " "))
|> Enum.map(fn
  # win (six points + selection)
  ["A", "Y"] -> 6 + 2
  ["B", "Z"] -> 6 + 3
  ["C", "X"] -> 6 + 1
  # draw (three points + selection)
  ["A", "X"] -> 3 + 1
  ["B", "Y"] -> 3 + 2
  ["C", "Z"] -> 3 + 3
  # lose (zero points + selection)
  ["A", "Z"] -> 3
  ["B", "X"] -> 1
  ["C", "Y"] -> 2
end)
|> Enum.sum()

Part 2

input
|> Kino.Input.read()
|> String.split("\n", trim: true)
|> Enum.map(&String.split(&1, " "))
|> Enum.map(fn
  # lose (zero points + selection)
  ["A", "X"] -> 3
  ["B", "X"] -> 1
  ["C", "X"] -> 2
  # draw (three points + selection)
  ["A", "Y"] -> 3 + 1
  ["B", "Y"] -> 3 + 2
  ["C", "Y"] -> 3 + 3
  # win (six points + selection)
  ["A", "Z"] -> 6 + 2
  ["B", "Z"] -> 6 + 3
  ["C", "Z"] -> 6 + 1
end)
|> Enum.sum()