UVA11733 Airports

Description

[problemUrl]: https://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&category=117&page=show_problem&problem=2833 [PDF](https://uva.onlinejudge.org/external/117/p11733.pdf) ![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA11733/3036f030e5b3517979ac173a895086c84f064d3e.png)

Input Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA11733/f99c6549842e7f4ad718cc5bbd3738b6b7c3475f.png)

Output Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA11733/ea84c8e2a7cf1cb7d66d2eb756ef9c05dea15acf.png)