@[GDCassini](/user/280465) 树链剖分写错了，你剖分的时候没有判断如果 $v=son_u$
by hegm @ 2023-12-08 07:20:56
给个关注吧 : )
by hegm @ 2023-12-08 07:22:16
@[hegm](/user/331947) 感谢大佬，眼瞎了
by GDCassini @ 2023-12-08 07:23:06
@[hegm](/user/331947) 好QAQ
by GDCassini @ 2023-12-08 07:23:34