UVA13205 Antivirus

Description

[problemUrl]: https://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&category=878&page=show_problem&problem=5128 [PDF](https://uva.onlinejudge.org/external/132/p13205.pdf) ![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA13205/d9621d2d1941ba2a6fa8efa635a4e33967672718.png)

Input Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA13205/ac923079d82979f0748dfa31c91e5d3e35d1d3f7.png)

Output Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA13205/e68dc1036f469f474ab5df1d40fcf313ff2e0606.png)