```cpp
int getf(int v)
{
if(f[v]==v)
return v;
else{
f[v]=getf(v);
return f[v];
}
}
```
挂得很明显
by xht @ 2019-12-04 19:42:33
@[a1513054585](/user/132352)
by xht @ 2019-12-04 19:42:41
@[xht37](/user/100544) 手误手误
by __zzh @ 2019-12-04 19:46:40
@[xht37](/user/100544) 还是不对啊
by __zzh @ 2019-12-04 19:49:41
```cpp
sort(edge+1,edge+1+n,cmp);
```
@[a1513054585](/user/132352)
by xht @ 2019-12-04 19:53:02
@[xht37](/user/100544) 有啥问题吗
by __zzh @ 2019-12-04 19:54:25
@[a1513054585](/user/132352) 你边有几条啊
by xht @ 2019-12-04 19:55:05
哦哦
by __zzh @ 2019-12-04 19:56:28
@[xht37](/user/100544) https://www.luogu.com.cn/record/28101138
仨点RE。。。
by __zzh @ 2019-12-04 19:59:23
@[a1513054585](/user/132352) 题目里面边数有多少啊
by xht @ 2019-12-04 20:01:27