@[bnnnnn](/user/416766) qrange函数里的中括号位置写错了
by Jonny09 @ 2023-08-29 14:54:09
```cpp
if(dep[top[x]<dep[top[y]]]) swap(x,y);
```
by Jonny09 @ 2023-08-29 14:54:47
@[Jonny09](/user/323984) 感谢！！已过
by bnnnnn @ 2023-08-31 20:38:48