[这个？](https://www.luogu.com.cn/discuss/470854)
by wininaction @ 2023-03-12 13:38:59
@[wininaction](/user/385428)
17过了，20没过
[记录](https://www.luogu.com.cn/record/104855268)
by S1746 @ 2023-03-16 13:46:12
k++就会爆
by tomAmy @ 2023-08-17 14:41:08