UVA12128 Escape from Enemy Territory

Description

[problemUrl]: https://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&category=243&page=show_problem&problem=3280 [PDF](https://uva.onlinejudge.org/external/121/p12128.pdf) ![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA12128/e803d40bea737fc812408ce51ca54135971de238.png)

Input Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA12128/d044e6ca6192dde78fd5923af466099b263b2c32.png)

Output Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA12128/4539ff99dc620103f1dba360020e27f56ff3000f.png)