写错了，是树论
by RainsAFO @ 2019-12-13 19:33:06
QTREE?
by Hydrate @ 2019-12-13 19:33:33
@[Lab_Tree](/user/145078) https://www.luogu.com.cn/problem/P4565
by cszmc2004 @ 2019-12-13 19:33:57
您确定难度在Day1T3下？
by RainsAFO @ 2019-12-13 19:35:01
还是谢谢
by RainsAFO @ 2019-12-13 19:35:09
@[Lab_Tree](/user/145078) https://www.luogu.com.cn/problem/P4074
by feecle6418 @ 2019-12-13 19:35:26
多谢
by RainsAFO @ 2019-12-13 19:36:46
难度指思维难度还是代码难度（
by Aleph1022 @ 2019-12-13 19:40:24
思维难度
by RainsAFO @ 2019-12-13 19:44:32
@[alpha1022](/user/75840)
by RainsAFO @ 2019-12-13 19:44:43