Supermean

题目描述

[problemUrl]: https://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&category=20&page=show_problem&problem=1824 [PDF](https://uva.onlinejudge.org/external/108/p10883.pdf) ![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA10883/155ce9f16a316bb9960640413bc964c014207642.png)

输入输出格式

输入格式


![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA10883/6b86f064694ab5cfa1593bbfca6a4875434d0fa3.png)

输出格式


![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA10883/e9e53dc819cc39a2978604af233b038fadd75229.png)

输入输出样例

输入样例 #1

4
1
10.4
2
1.0 2.2
3
1 2 3
5
1 2 3 4 5

输出样例 #1

Case #1: 10.400
Case #2: 1.600
Case #3: 2.000
Case #4: 3.000