UVA904 Overlapping Air Traffic Control Zones

Description

[problemUrl]: https://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&category=11&page=show_problem&problem=845 [PDF](https://uva.onlinejudge.org/external/9/p904.pdf) ![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA904/2dd5f320afb05164fef2369c07116fbc807f31f2.png)

Input Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA904/455290f241c561ea340f848c0dc8677562c4c818.png)

Output Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA904/2f8750ee4941f3cec613117968944f845a159d89.png)