Advent of code 2023 day 18

def day18(s, *, part2=False):
  x = 0
  area = 1
  for line in s.splitlines():
    op, s_num, color = re.match(r'^([LRUD]) (\d+) \(#(......)\)$', line).groups()
    num = int(color[:5], 16) if part2 else int(s_num)
    op = 'RDLU'[int(color[5])] if part2 else op
    match op:
      case 'R':
        x += num
        area += num
      case 'L':
        x -= num
      case 'D':
        area += x * num + num
      case 'U':
        area -= x * num

  return area