UVA345 It's Ir-Resist-Able!

Description

[problemUrl]: https://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&category=5&page=show_problem&problem=281 [PDF](https://uva.onlinejudge.org/external/3/p345.pdf) ![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA345/d3acb9347e0c4c7a36ad1a88810ea0024a01328e.png)

Input Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA345/92ea0be5f677d8e128090e2a89ecb09669768f1b.png)

Output Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA345/4edaeccd9e6c373825b8ac61ebd21d140ead8079.png)