#BZOJ3652. 大新闻
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ID: 27800
Type: Default
1000ms
256MiB
Tried: 0
Accepted: 0
Difficulty: (None)
Uploaded By:
Hydro
大新闻
题目描述
输入格式
输出格式
3 0.5
2.000000
f提示
1<=N<=10^18
Source
鸣谢胡泽聪提供SPJ