UVA10263 Railway

Description

[problemUrl]: https://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&category=14&page=show_problem&problem=1204 [PDF](https://uva.onlinejudge.org/external/102/p10263.pdf) ![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA10263/d1ed2bc8f6afb94a3375be336aad32cfe85ebff7.png)

Input Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA10263/0fd4a29d9984301031223bf689212916f95f04d5.png)

Output Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA10263/ad9602b91fcd9a4d350a2007c6a9db61e5c5808a.png)