UVA978 Lemmings Battle!

Description

[problemUrl]: https://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&category=11&page=show_problem&problem=919 [PDF](https://uva.onlinejudge.org/external/9/p978.pdf) ![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA978/6fc2602bfdc9f1e62de73b563981378661f624e8.png)

Input Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA978/e89b68724ca7c8d50915cb53554dd40afaaec540.png)

Output Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA978/39549b750dc3cb49d4154b7d5e684f33813fb623.png)