@[liverxiwo](/user/1162380)
https://www.luogu.com.cn/article/hj6o3i20
do it yourself
by __My0217__ @ 2024-03-27 13:49:33
@[__My0217__](/user/784650) 照着码了一遍,但是不知道问题在哪。
另:你自己看提交记录,我还没有无聊到抄
by liverxiwo @ 2024-03-27 13:55:14
@[liverxiwo](/user/1162380) `ed[++s].next=head[x];`改为`ed[++s].next=h[x];`
by __zaa__ @ 2024-03-27 14:09:36