UVA11168 Airport

Description

[problemUrl]: https://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&category=23&page=show_problem&problem=2109 [PDF](https://uva.onlinejudge.org/external/111/p11168.pdf) ![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA11168/f16065b7494be61f95712a581f99b12cd3a92342.png)

Input Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA11168/3a3768b6dc72c84bf7b5c738abc62e8367230f89.png)

Output Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA11168/a28cb0782efcd96630186f88e9caa70aef8bc67a.png)