import logging
lines = [x.strip() for x in open('input', 'r').readlines()]

east = 0
north = 0
# 0 = E, 1 = N, 2 = W, 3 = S
facing = 0


def serialize():
    return f'N{north} E{east} F{facing}'


for line in lines:
    pos = serialize()
    command = line[0]
    number = int(line[1:])

    if command in ['S', 'W', 'R']:
        number *= -1
    elif command in ['F'] and facing in [2, 3]:
        number *= -1

    if command in ['N', 'S']:
        north += number
    elif command in ['E', 'W']:
        east += number
    elif command in ['R', 'L']:
        facing = (facing + number // 90) % 4
    elif command in ['F']:
        if facing % 2 == 0:
            east += number
        else:
            north += number
    else:
        raise Exception(f'Unknown command: {command}')

    print(f'{line}: \t{pos} -> {serialize()}')

print()
print(f'{north=} {east=} {facing=}')
manhattan = abs(north) + abs(east)
print('Solution')
print(manhattan)