@[shyr](/user/357163) 求助，您 A 了吗..我也 10pts
by Tibrella @ 2023-06-12 15:41:03
@[Tibrella](/user/655192) 树状数组里面x< N,不能只x<=tot
by Serendipity_ly @ 2023-07-16 19:05:30
@[Serendipity_ly](/user/610578) [感谢，问题解决了，我是匹配的时候出问题了）](https://www.luogu.com.cn/discuss/618356)
by Tibrella @ 2023-07-17 07:52:06