UVA11994 快乐涂色 Happy Painting!

Description

[problemUrl]: https://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&category=229&page=show_problem&problem=3145 [PDF](https://uva.onlinejudge.org/external/119/p11994.pdf) ![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA11994/31dfe9db51b1566edc88ff8c86f4b753f060ca1a.png)

Input Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA11994/eddc9b764e8b2bcdb7c4fa5c04fa7bc0fb8fbecd.png)

Output Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA11994/a45a597c48b6ca83d2391eaa4acd4ab093077db1.png)