[记录](https://www.luogu.com.cn/record/130655508)
by like_tis_yzx @ 2023-10-20 21:17:09
@[like_tis_yzx](/user/779997) 把 O2 关了逝逝
by heyx0201 @ 2023-10-20 21:23:36
逝逝 -> 试试
by heyx0201 @ 2023-10-20 21:23:57
@[like_tis_yzx](/user/779997) [关O2就寄了](https://www.luogu.com.cn/record/130665017)
by heyx0201 @ 2023-10-20 21:25:34
为什么关O2就寄了
by like_tis_yzx @ 2023-10-22 17:30:01
@[heyx0201](/user/768951)
by like_tis_yzx @ 2023-10-22 17:30:32
@[like_tis_yzx](/user/779997)
因为这是新鲜氧气（确信
O2 有时能让你一个 $O(10^9)$ 的程序用九百多 ms 的时间通过
[比如这个：暴力 + O2 600ms 通过](https://www.luogu.com.cn/record/122604088)
by heyx0201 @ 2023-10-22 19:08:32
@[heyx0201](/user/768951) 涨知识了
by dkdk @ 2023-11-07 18:57:42
正好在想vector，谢了
by 558316xz @ 2023-11-15 17:35:04
虽然之前找题解看过关于第二问题的写法，但我还是不理解，求告知
by 558316xz @ 2023-11-15 17:41:14