UVA10308 Roads in the North

Description

[problemUrl]: https://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&category=15&page=show_problem&problem=1249 [PDF](https://uva.onlinejudge.org/external/103/p10308.pdf) ![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA10308/a5b0017c73c1efd35c517c5bd2e22fa4fc47b5a2.png)

Input Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA10308/4c9f0cb9897100b3c5422bb470b48a7c297947d9.png)

Output Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA10308/6681e5fc7fb2e8695bfbd99b954c9899a344269b.png)