~~不能 AC 就行~~
by zltqwq @ 2021-01-29 17:03:34
@[zltzlt](/user/275273) 稍微修改了一下又AC了
by Lappland_Texas @ 2021-01-29 17:10:31
```cpp
for(int i=cnt;i>=1;i--)
{
if(ed[i].l!=0&&ed[i].r!=0)
cout<<ed[i].l<<" "<<ed[i].r<<endl;
}
```
@[zltzlt](/user/275273)
```
for(int i=cnt;i>=1;i--)
{
if(ed[i].l>0&&ed[i].r>0&&ed[i].l<=n&&ed[i].r<=n)
cout<<ed[i].l<<" "<<ed[i].r<<endl;
}
```
by Lappland_Texas @ 2021-01-29 17:11:16
@[一扶苏一](/space/show?uid=65363)
by Lappland_Texas @ 2021-01-30 14:21:02
捞一下
by Lappland_Texas @ 2021-02-19 11:40:11