UVA12599 Black and White

Description

[problemUrl]: https://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&category=441&page=show_problem&problem=4277 [PDF](https://uva.onlinejudge.org/external/125/p12599.pdf) ![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA12599/b7e78210208cc390b195c52cd288d768f000a3d9.png)

Input Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA12599/9b9e52211ff3a1d00079ae0286839ab9f5a84861.png)

Output Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA12599/f62ab5287f132327eaef0baa0a8c175161296f08.png)