clouds.py

def win(clouds):
    print(clouds)
    now_on = -1
    jumps = 0

    if clouds[-1] == 1:
        print("invalid game! ends with a thunderhead.")
        return None

    while True:
        if now_on == len(clouds) - 1:
            print("won with " + str(jumps) + " jumps")
            break

        answer = clouds[now_on + 1] + clouds[now_on + 2] + clouds[now_on + 1]

        if answer == 3:
            print("invalid game. I see no cumulus.")
            break

        if answer == 1:
            now_on += 1
        elif answer == 2 or answer == 0:
            now_on += 2

        jumps += 1

win([0, 0, 0, 0, 1, 0])
win([0, 1, 0, 0, 1, 0])
win([1, 0, 0, 1, 0, 1])
win([1, 0, 1, 1, 0, 0])