修改
```cpp
if(mx[u]<size[root])
root=u;
```
为
```cpp
if(mx[u]<mx[root])
root=u;
```
这样会导致重心寻找错误,时间复杂度退化
by zjy0004 @ 2023-03-19 17:48:16
@[OIdrearmer_Z](/user/479493) 谢谢大佬,一直没看到555
by a_sad_soul @ 2023-03-20 22:51:41
@[OIdrearmer_Z](/user/479493) 改了,但是好像没有什么用捏
by a_sad_soul @ 2023-03-20 22:55:04
@[a_sad_soul](/user/456675) 抱歉,现在才看到
```cpp
bool vis[MAXN],judge[MAXXN],ans[MAXN],S;
```
by zjy0004 @ 2023-03-21 08:24:21
@[OIdrearmer_Z](/user/479493) wc什么低级错误,谢谢大佬%%%
by a_sad_soul @ 2023-03-21 13:19:13