啊这，抱歉，我们马蜂不符，我也很难帮你debug
by zxtikes @ 2022-04-25 13:06:39
~~开头那一坨是啥~~
by pengzy___ @ 2022-04-25 13:10:28
@[zxtikes](/user/178829) 格式化一下就好了QAQ
by 蒟酱 @ 2022-04-25 13:13:41
@[pengzy___](/user/525177) 快读
by 蒟酱 @ 2022-04-25 13:13:50
查明原因：
```cpp
dfs2(rt,rt);
```
by 蒟酱 @ 2022-04-25 13:22:23