xlv里面开ll，然后做除法的时候要转换成double
by _5011_ @ 2020-07-02 19:07:27
@[Lube](/user/118630) 把所有 int 转换为 long long
by TachibanaKanade @ 2020-07-02 19:12:16
[加一句 `#define int long long` 就可以 A 了](https://www.luogu.com.cn/record/34798055)
by 一只书虫仔 @ 2020-07-02 19:26:53
@[一只书虫仔](/user/114914) 已AC,谢谢
by Lube @ 2020-07-02 19:35:35