UVA621 Secret Research

Description

[problemUrl]: https://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&category=8&page=show_problem&problem=562 [PDF](https://uva.onlinejudge.org/external/6/p621.pdf) ![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA621/a5f75c6b7b438d751bbbee6f40d4a9ef2e530ae7.png)

Input Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA621/89b81e61ca0e034b0ed5dc59a9191be256996016.png)

Output Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA621/c3e4f30b982577e940b76052b187d39db36f372b.png)