UVA11052 Economic phone calls

Description

[problemUrl]: https://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&category=22&page=show_problem&problem=1993 [PDF](https://uva.onlinejudge.org/external/110/p11052.pdf) ![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA11052/e896fa46fcb063ceb386ab2dabab5b907a170a16.png)

Input Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA11052/7bc10fa577ae39d73bcb39135819c492ead8ba06.png)

Output Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA11052/8d62b9698d97b15d7cdbd264f02e2045de143fab.png)