qwq
by Jerry_heng @ 2023-08-14 20:28:15
@[Jerry_heng](/user/763878)
```cpp
if(dep[u]<dep[v])swap(u,v);
```
改成
```cpp
if(dep[top[u]<dep[top[v])swap(u,v);
```
by sane1981 @ 2023-08-20 09:44:25