UVA186 Trip Routing

Description

[problemUrl]: https://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&category=3&page=show_problem&problem=122 [PDF](https://uva.onlinejudge.org/external/1/p186.pdf) ![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA186/a4f23ef9275dae989d990785af17cd9c4429b87d.png)

Input Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA186/baf0a70ded00df3085f63c33d3b2158247e6e494.png)

Output Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA186/52199618d132e8defdc29e821aa9f64f6046a231.png)