UVA886 Named Extension Dialing

Description

[problemUrl]: https://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&category=10&page=show_problem&problem=827 [PDF](https://uva.onlinejudge.org/external/8/p886.pdf) ![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA886/283b68e6d132c92348d0b855fe23a087bb838140.png)

Input Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA886/467d4bc864536a8ecc91997746dc71bd40b0df1a.png)

Output Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA886/888cc9f9c1de7bfe354a111da357c337f2ee5b36.png)