路径压缩了啊$QAQ$
```
else return fa[x]=find(fa[x]);
```
by tiandong123 @ 2018-10-25 20:45:48
@[zybnxy](/space/show?uid=51645)
...具体请去搜索$c++$表达式返回值$QAQ$
by tiandong123 @ 2018-10-25 20:46:30
@[tiandong123](/space/show?uid=53023) 对不起dalao打扰了
by zybnxy @ 2018-10-25 20:51:12