UVA11885 Number of Battlefields

Description

[problemUrl]: https://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&category=226&page=show_problem&problem=3007 [PDF](https://uva.onlinejudge.org/external/118/p11885.pdf) ![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA11885/f016b801db7708c13685ddf9c6a988654ea8e291.png)

Input Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA11885/4f203c59f19ba6c6cfcab9de7bcb1d581abfb4ea.png)

Output Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA11885/db64a6cb7813f06e25be55e4f299802e0acdc957.png)