UVA10767 Barcelona's trams

Description

[problemUrl]: https://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&category=19&page=show_problem&problem=1708 [PDF](https://uva.onlinejudge.org/external/107/p10767.pdf) ![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA10767/f6cc155500d74b0c9e0617aaa1c3d507cd0b51d1.png)

Input Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA10767/d34bfaab40aa75de67c2a6672b61e0433f3b60e0.png)

Output Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA10767/533cf5b5b42706381ca9dbcd617a0d5647aca8b5.png)