UVA11986 Save from Radiation

Description

[problemUrl]: https://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&category=229&page=show_problem&problem=3137 [PDF](https://uva.onlinejudge.org/external/119/p11986.pdf) ![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA11986/ef295f003b850d193aa6bb194df1aaa2dcfd47b7.png)

Input Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA11986/82423a54f9cccfdfca9586ced9db749f08c65c0b.png)

Output Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA11986/0e533905ba5bd7374dcde9fc2b34c68de70e9b62.png)