UVA11589 Save the President

Description

[problemUrl]: https://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&category=27&page=show_problem&problem=2636 [PDF](https://uva.onlinejudge.org/external/115/p11589.pdf) ![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA11589/c14957e5e12103ef8bf21e45a4998fcedf5e0dfa.png)

Input Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA11589/ea5fb92a20c5d28498812d8ead71004e7a9afcda.png)

Output Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA11589/64381532667eb751161b0a78b1e4135f76761c2a.png)