UVA11796 Dog Distance

Description

[problemUrl]: https://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&category=117&page=show_problem&problem=2896 [PDF](https://uva.onlinejudge.org/external/117/p11796.pdf) ![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA11796/76c9c82b70192684e3f5c88a966831c2d254fa5d.png)

Input Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA11796/9c45db46af924296cac97c3bd992e4383baec79a.png)

Output Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA11796/3ed368f5ae0eee1c0d5a6d5d1583c08c6b2bde51.png)