@[Cheng、熙®](/user/125359) s={1,2,3}就是整棵树当然只有一个连通块啊
by Gemini7X @ 2020-07-05 23:05:29
@[Flying_Bird](/user/328405) 啊！哦！我懂了，wszz thanks!!!
by Cheng、熙® @ 2020-07-05 23:09:43
@[Flying_Bird](/user/328405) (回复E)那我写得好像是正解，关键是分类讨论挂了/kk
by Cheng、熙® @ 2020-07-05 23:11:24
@[Flying_Bird](/user/328405) 我直接去重构qwq
by Cheng、熙® @ 2020-07-05 23:12:56
@[Cheng、熙®](/user/125359) 你可以去看看[这个帖子](https://www.luogu.com.cn/discuss/show/235603)
by Gemini7X @ 2020-07-05 23:14:05
@[Flying_Bird](/user/328405) 重构了从WA1个点上涨了2个。。
by Cheng、熙® @ 2020-07-05 23:40:38
@[Flying_Bird](/user/328405) 是不是必须负数的情况就一种啊
by Cheng、熙® @ 2020-07-06 16:36:53
@[Flying_Bird](/user/328405) 终于A了。。3q!
by Cheng、熙® @ 2020-07-06 17:25:51