require "set"

input = STDIN.read.chomp
commands = input.split ", "

position = [0, 0] # Cartesian coordinates, +x is right, +y is up
direction = 0 # North I guess

visited_positions = Set.new([position.clone])
first_revisited_position = nil

commands.each do |command|
  turn = command[0] == "L" ? 1 : -1
  distance = command[1..].to_i
  direction += turn
  direction = direction % 4

  distance.times do
  case direction
  when 0
    position[1] += 1
  when 1
    position[0] += 1
  when 2
    position[1] -= 1
  when 3
    position[0] -= 1
  end

  if !visited_positions.add?(position.clone)
    if first_revisited_position.nil?
      first_revisited_position = position.clone
    end
  end
  end
end

part_1 = position.map(&:abs).sum
part_2 = first_revisited_position.map(&:abs).sum

puts "Part 1: #{part_1}"
puts "Part 2: #{part_2}"