Lights inside a 3d Grid

题目描述

[problemUrl]: https://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&category=78&page=show_problem&problem=2652 [PDF](https://uva.onlinejudge.org/external/116/p11605.pdf) ![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA11605/f394f10a685f8b242eb467bb13487d022d614448.png)

输入输出格式

输入格式

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA11605/c5d41750761f7d6178b8c9d2c08c826b433400e0.png)

输出格式

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA11605/d5e21ee9860a9b4293746820641e7f9c7c358b87.png)

输入输出样例

输入样例 #1

2
2 3 4 1
2 3 4 2

输出样例 #1

Case 1: 6.3750000000
Case 2: 9.0976562500