UVA12078 Laserbox

Description

[problemUrl]: https://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&category=242&page=show_problem&problem=3230 [PDF](https://uva.onlinejudge.org/external/120/p12078.pdf) ![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA12078/31ea42b24329457f767c5e4559b72ae5abf4c402.png)

Input Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA12078/c1f7395020f19da4d5d5b60d400d1209a671b62c.png)

Output Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA12078/da8445607c3348cfed8be31558e23b32fd845be6.png)