严格 $\sqrt n$ 由于 ```map``` 太慢会 ```TLE``` :[Here](https://www.luogu.com.cn/record/142037228)
by lijunxi1 @ 2024-01-06 09:45:56
之前我写了一个立方阶的程序,不开O2 30分,开O2 AC,最后一个点卡了905ms
by wuxinlong @ 2024-01-06 09:57:37