这要再违规就有鬼了（
by _5011_ @ 2020-07-07 20:58:03
```cpp
else fa[x]=find(fa[x]);
```
应改为
```cpp
else return fa[x]=find(fa[x]);
```
@[hpcwfxlcx](/user/213107)
by grass8cow @ 2020-07-07 21:09:11
@[草吃牛](/user/223624) %%%知道了~~不愧是你~~
by hpcwdclcx @ 2020-07-07 21:10:18