UVA145 Gondwanaland Telecom

Description

[problemUrl]: https://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&category=3&page=show_problem&problem=81 [PDF](https://uva.onlinejudge.org/external/1/p145.pdf) ![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA145/c3d07da6ed463d6c9b36c009da90a023dd9fb9c8.png)

Input Format

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Output Format

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