UVA12970 Alcoholic Pilots

Description

[problemUrl]: https://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&category=862&page=show_problem&problem=4849 [PDF](https://uva.onlinejudge.org/external/129/p12970.pdf) ![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA12970/0719c02f2a35b659238076a6c1d74552ddd9a4fe.png)

Input Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA12970/8c8d01a536ea22179bee1249fe4783dba53330ca.png)

Output Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA12970/1ab034189920881353c4748ab381d0973a024a93.png)