UVA13117 ACIS, A Contagious vIruS

Description

[problemUrl]: https://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&category=871&page=show_problem&problem=5028 [PDF](https://uva.onlinejudge.org/external/131/p13117.pdf) ![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA13117/b0b80dfbd306c0515637677e2dc7aa7316266c7e.png)

Input Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA13117/10cb468e3569f91bb0bfa5c20de97bc02c052fc1.png)

Output Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA13117/4764b103faaf8de9a222d09208a297e369a19bf9.png)