ac代码:[here](https://www.luogu.com.cn/paste/iwisunsb)
by ppip @ 2021-07-11 08:29:54
@[马保国guanfang号](/user/374433) 请自删，谢谢
by _Haoomff_ @ 2021-07-11 08:42:39
@[L_YALONG](/user/368111) 怎么了？
by ppip @ 2021-07-11 09:01:23
你就这么给出AC代码？
by _Haoomff_ @ 2021-07-11 14:00:41
@[马保国guanfang号](/user/374433)
by _Haoomff_ @ 2021-07-11 14:00:55
@[L_YALONG](/user/368111) 我已经把剪贴板删了
by ppip @ 2021-07-11 14:41:14
@[马保国guanfang号](/user/374433) 那就好了
by _Haoomff_ @ 2021-07-11 19:05:34