UVA12537 Radiation

Description

[problemUrl]: https://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&category=441&page=show_problem&problem=3982 [PDF](https://uva.onlinejudge.org/external/125/p12537.pdf) ![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA12537/2bb11d0c965e2b754bde56b9e7f409cd7ef4d69a.png)

Input Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA12537/d9b69e90deeb9dbf5f87a6f0211e74ed69c0d623.png)

Output Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA12537/32b387f271e1ff2b815f92e19a4a2177bc856640.png)