def userMove():
    global height
    move = int(raw_input("How many: "))
    if move < 1 or move > height/2:
        return (height, False, True)
    else:
        height = height - move
        return (height, True, height - move == 1)

def hanoi(n, source, target, using):
    if n == 1:
        print source, "--->", target
    else:
        hanoi(n-1, source, using, target)
        print source, "--->", target
        hanoi(n-1, using, target, source)