没事了，前驱后继忘记加`splay(u, 0)`了。
by 已注销fpaXsZxStfzSg @ 2023-03-23 11:43:14
这我都能跟您犯一样的错误，多谢了
by Tiga_Zhou @ 2023-05-20 17:02:03
谢谢大佬
by zhi_hui_kan_ti_jie @ 2023-07-12 17:01:46
谢谢大佬%%%
by g1ove @ 2023-07-30 12:02:30