UVA11020 Efficient Solutions

Description

[problemUrl]: https://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&category=22&page=show_problem&problem=1961 [PDF](https://uva.onlinejudge.org/external/110/p11020.pdf) ![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA11020/9555df1056f76f0972b92e8ccf104c83edd473b5.png)

Input Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA11020/b64827292fcffd736f9f4993e60aedd179a5fbce.png)

Output Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA11020/f8b9cfef09bbbbdac2ebca9b87c3f4a3df45c53c.png)