UVA10572 Black & White

Description

[problemUrl]: https://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&category=17&page=show_problem&problem=1513 [PDF](https://uva.onlinejudge.org/external/105/p10572.pdf) ![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA10572/f03240f6ef7e3c665608a49c5ad0d6db27809c53.png)

Input Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA10572/3a6f7eb38401667ae31fe5213d958909932cd0fd.png)

Output Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA10572/e0517b17724262fc72fb8eacab76d372dc88df71.png)