UVA11409 Ball Passing

Description

[problemUrl]: https://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&category=26&page=show_problem&problem=2404 [PDF](https://uva.onlinejudge.org/external/114/p11409.pdf) ![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA11409/99ae3ce49dd2ad4b9b0edc59755ddb2ae2d7cadb.png)

Input Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA11409/02d3fb1d4bca64ac0f61b373ef91314e146841b0.png)

Output Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA11409/a814d0ba35b378015d9f2eff60e11e8d98eb44ba.png)