哇，你咕发帖功能能用了
by saipubw @ 2019-06-05 01:28:05
……
by zxz_sword @ 2019-06-05 07:15:56
@[ReModer](/space/show?uid=129873) 把 ```ans[0]``` 赋为 $-\inf$ 试试？
by Juanzhang @ 2019-06-05 07:39:10
@[Juanzhang](/space/show?uid=73934) Orz过了 但为啥啊，，
by ReModer @ 2019-06-05 09:46:31
@[ReModer](/space/show?uid=129873) update(u)的时候若有至少一个儿子为空，那么ans[u]就至少会被更新为0
by Juanzhang @ 2019-06-05 10:19:58
@[Juanzhang](/space/show?uid=73934) Orz 谢大佬
by ReModer @ 2019-06-05 15:22:04