@[dhpzy](/user/1040409)
```cpp
f[find(a+n)]=getf(b);
f[find(b+n)]=getf(a);
```
by Genshineer @ 2023-08-13 22:07:12
@[long_long_integer](/user/191248) 谢谢大佬
by dhpzy @ 2023-08-13 22:20:41