UVA12675 Hide and seek

Description

[problemUrl]: https://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&category=602&page=show_problem&problem=4413 [PDF](https://uva.onlinejudge.org/external/126/p12675.pdf) ![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA12675/1d49bc70a70bc86516897807cff768beb320522b.png)

Input Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA12675/028ebd7203f4ae8a1a1eea0fcccfe48f405adb4b.png)

Output Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA12675/384bfefdf0a898d2bfa2bc7d30a4ca495415ba1e.png)