UVA12913 Grounded

Description

[problemUrl]: https://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&category=862&page=show_problem&problem=4778 [PDF](https://uva.onlinejudge.org/external/129/p12913.pdf) ![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA12913/75bbbe054c81f3d4dc226b267518f42794584aec.png)

Input Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA12913/b040d8f678bb6a49979bf948bebe9f61139cddba.png)

Output Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA12913/a0e983078a86e06151804415ccca722e9ad69fe7.png)