UVA12205 Happy Telephones

Description

[problemUrl]: https://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&category=244&page=show_problem&problem=3357 [PDF](https://uva.onlinejudge.org/external/122/p12205.pdf) ![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA12205/5b650fabffb959a61bf21a7af563d4b27d70ec1e.png)

Input Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA12205/79fb904146736df9d243cfa5ca308169d947e8f5.png)

Output Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA12205/29bb781ee974b04458d870b1dc1a1c4de8647364.png)