UVA157 Route Finding

Description

[problemUrl]: https://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&category=3&page=show_problem&problem=93 [PDF](https://uva.onlinejudge.org/external/1/p157.pdf) ![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA157/77cf77ec718af2b613ba60a39597ef7235f24247.png)

Input Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA157/c136d252554be59062e6a6aff607484881dc9905.png)

Output Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA157/0424d2d17bc2dc80cc5a62a66f5d92395f61f061.png)