@[The_Soloist](/user/1264072) 下传标记要把子树的标记加上当前标记而不是赋值
by sunrise1024 @ 2024-02-29 20:04:49
@[sunrise1024](/user/368884) 感谢大佬，[A](https://www.luogu.com.cn/record/148778946)掉了。
by The_Soloist @ 2024-02-29 20:14:34