UVA12222 山路 Mountain Road

Description

[problemUrl]: https://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&category=244&page=show_problem&problem=3374 [PDF](https://uva.onlinejudge.org/external/122/p12222.pdf) ![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA12222/70b1513c598424583f69444a5ba7168cb409cb36.png)

Input Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA12222/9eca54bfc532d2455666af83d694986f4a343ceb.png)

Output Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA12222/2bdb8b391cc8a9113a138b5f0fa5f014ca7f0319.png)