```cpp
if(dep[top[y]]>dep[top[x]])
swap(x,y);
```
错了吧
by Uzumaki @ 2020-11-20 14:32:21
@[陈宣羽](/user/99827) 刚上课回来orz,让x所在链的链顶深度更深,这么写应该没问题?我板子里也这么写的x
by chichichichi @ 2020-11-20 15:36:54
@[陈宣羽](/user/99827)
我刚看到>也想说,但是又发现x,y的位置反了,就没问题了(果然有人和我一样看错了/kk)
by 烛木 @ 2020-11-20 15:51:26
@[chichichichi](/user/114012) 根节点是1
by 幻影星坚强 @ 2020-11-20 15:59:57
@[烛木](/user/366746)
@[chichichichi](/user/114012)
抱歉, 我看错了
by Uzumaki @ 2020-11-20 16:00:22
注释是发帖的时候打的,交的时候没有/kk
by chichichichi @ 2020-11-20 16:00:27
```cpp
for(int i=1;i<n;i++)
{
int u,b;
scanf("%d%d",&u,&b);
add(u,b);
in[b]++;
}
```
前向星没双向边吧
by 烛木 @ 2020-11-20 16:02:34
@[幻影星坚强](/user/111728) 我居然没有看到/jk,感谢!但是依然RE /kk
by chichichichi @ 2020-11-20 16:02:57
@[烛木](/user/366746) 这道题不是有向边嘛
by chichichichi @ 2020-11-20 16:04:16
@[烛木](/user/366746) 靠靠靠,是无向边,感谢!!
by chichichichi @ 2020-11-20 16:06:03