UVA10671 Grid Speed

Description

[problemUrl]: https://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&category=18&page=show_problem&problem=1612 [PDF](https://uva.onlinejudge.org/external/106/p10671.pdf) ![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA10671/ded58d0bd4c4f30408dd4627751ccc0eae1ecc35.png)

Input Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA10671/4cd10adbe6057b3f97a7bdebcdcc925b6d1d900d.png)

Output Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA10671/be33167c6155cada0ed84d1c332827d1239ff4bc.png)