如果做法不对的话,给个hack也行吧
by __Seniorious__ @ 2023-10-13 09:08:59
考虑欧拉序可能不会统计到路径 $LCA$,要分情况讨论。
之前讨论区的hack你好像输出 $0$:
```
5 1
4 3 3 3 1
4 3
2 1
5 3
1 4
1 1
```
@[__Seniorious__](/user/333119)
by Eltaos_xingyu @ 2023-10-13 09:29:34
你可以看一下tj,你欧拉序好像求错了......
by Eltaos_xingyu @ 2023-10-13 09:33:07
~~(可能模拟赛的数据出水了)~~
by Eltaos_xingyu @ 2023-10-13 09:36:28
@[xing_yu](/user/384822) lca不会出问题,但是同一个点就会寄。。。
总之谢啦!
by __Seniorious__ @ 2023-10-13 09:36:35
所以说我是自己胡的欧拉括号序状物。。。已经过了
by __Seniorious__ @ 2023-10-13 09:37:22
性欲上升 /se
by bulijoijoidibuliduo @ 2023-10-13 09:43:24
???
by Eltaos_xingyu @ 2023-10-13 09:46:20
性欲上升 /se
by Nityacke @ 2023-10-13 10:00:36
/bx
by Prms_Prmt @ 2023-10-13 11:08:38