建议使用莫队。
by 听取MLE声一片 @ 2023-06-24 08:35:34
@[听取MLE声一片](/user/253738) ~~我不会莫队啊~~
by Balor @ 2023-06-24 08:46:16
（莫队）zc
by ningyuqi_xin @ 2023-06-24 10:09:42
我超，没注意到值域
弱化版过了（
by Balor @ 2023-06-25 20:29:54