UVA184 Laser Lines

Description

[problemUrl]: https://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&category=3&page=show_problem&problem=120 [PDF](https://uva.onlinejudge.org/external/1/p184.pdf) ![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA184/215c788e3f652532e07f249de34e786c455433c6.png)

Input Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA184/ad67f9cefbcd1bd42eaf4461262c74bfbd62a4ad.png)

Output Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA184/73a1aba38a0a6a22a5a59f72f1f2995dc686fae8.png)