UVA13228 Laser Avoidance

Description

[problemUrl]: https://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&category=878&page=show_problem&problem=5151 [PDF](https://uva.onlinejudge.org/external/132/p13228.pdf) ![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA13228/73db03d36131c13bba3b9cd1203baf1545a8a847.png)

Input Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA13228/40f8ad9ce21ba2236cca33e1bfa71182a05a417a.png)

Output Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA13228/2af5512112d38084e4c91a0e82b911ddbd4575ab.png)