Input:

5
1 2
2 1 3
3 2 4 5
1 3
1 3

Answer:

1 2 3 4 5

以下题解输出错误：

https://www.luogu.com.cn/article/gg4exchg

https://www.luogu.com.cn/article/vblm8ce5

https://www.luogu.com.cn/article/3waattdm

https://www.luogu.com.cn/article/ppgg4isl

https://www.luogu.com.cn/article/7z8o234t

错误的题解均输出 1 2 4 3 5。