UVA12246 Ingenious Metro

Description

[problemUrl]: https://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&category=244&page=show_problem&problem=3398 [PDF](https://uva.onlinejudge.org/external/122/p12246.pdf) ![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA12246/70614863ab47cb74899450f9e44deac6851adbf9.png)

Input Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA12246/37e9fd541878d1d377ff64a3be3a00539bd2e5fe.png)

Output Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA12246/876d9278664755b407d1ee1474ee42680c463900.png)