[同题](https://www.luogu.com.cn/problem/P2199) by FCB_1899 @ 2021-02-26 11:50:04
@[wangzl](/user/222039) hdnoip数据好像得修一下，luogu上ac的代码那上面好像RE by FCB_1899 @ 2021-02-26 11:56:43