```cpp
a[find(x)]=y;
```
改成
```cpp
a[find(x)]=find(y);
```
[AC](https://www.luogu.com.cn/record/96380004)
by guozhetao @ 2022-12-03 11:52:15
@[kszmhy](/user/749184)
by guozhetao @ 2022-12-03 11:55:29
@[guozhetao](/user/669924) ok
by kszmhy @ 2022-12-05 18:00:36
@[guozhetao](/user/669924) 栓Q
by kszmhy @ 2022-12-05 18:02:12