UVA380 Call Forwarding

Description

[problemUrl]: https://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&category=5&page=show_problem&problem=316 [PDF](https://uva.onlinejudge.org/external/3/p380.pdf) ![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA380/a720e7afd85d8a3f725fe4ef55ae3f4ae1f52888.png)

Input Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA380/c68442f91719dcb1060cd06f0be5ee4c172015f2.png)

Output Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA380/3b2e4ba52568703288a86ffd35545882d55dea1c.png)