递归，汉诺塔游戏

def hanoi(n, a, b, c):
    if n == 1:
        print(n, a + '->' + c)
    else:
        hanoi(n - 1, a, c, b)
        print(n, a + '->' + c)
        hanoi(n - 1, b, a, c)


hanoi(5, 'A', 'B', 'c')