UVA12511 Virus

Description

[problemUrl]: https://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&category=441&page=show_problem&problem=3955 [PDF](https://uva.onlinejudge.org/external/125/p12511.pdf) ![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA12511/b6f649db4eccd4de344f0941751ec37dda6c9432.png)

Input Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA12511/decea7304f6de31df7d71741aaf818c890236583.png)

Output Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA12511/c24623826dfaa3fb62b0a71aecd9af30209b9b7a.png)