UVA11434 Careless Postman Problem

Description

[problemUrl]: https://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&category=26&page=show_problem&problem=2429 [PDF](https://uva.onlinejudge.org/external/114/p11434.pdf) ![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA11434/52f6b8533f5aa6b9eddbf7b0b1701962458e7dc8.png)

Input Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA11434/dafc8b6141300a8d8e3bfc1fe8ea79a5daf150b0.png)

Output Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA11434/d7a56154f4e09354388da6cc243145200af062ce.png)