2022/day02.rb

lines = ARGF.read.split("\n")
part1 = part2 = 0

lines.each do |line|
  theirs = line[0].ord - 'A'.ord
  ours = line[2].ord - 'X'.ord

  part1 += ours + [4, 7, 1][(ours - theirs) % 3]
  part2 += [1, 4, 7][ours] + (theirs + ours - 1) % 3
end

puts part1, part2