UVA511 地图查询 Do You Know the Way to San Jose?

Description

[problemUrl]: https://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&category=7&page=show_problem&problem=452 [PDF](https://uva.onlinejudge.org/external/5/p511.pdf) ![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA511/26e6330848064fd4751b76d2e2695dde09b88405.png)

Input Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA511/845b00d15b05066583111c7057b9e7a8acad2aee.png)

Output Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA511/f7fd5e5203f6bfd1fec53f1a6fbcdbda6d01c7ea.png)