[n次剩余](https://www.luogu.com.cn/problem/P5668) by panyf @ 2020-10-03 21:34:31
@[panyf](/user/221955) 感谢大佬orz，看来是我想的太简单了 by 小辣椒嘿嘿 @ 2020-10-03 21:38:34