UVA247 电话圈 Calling Circles

Description

[problemUrl]: https://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&category=4&page=show_problem&problem=183 [PDF](https://uva.onlinejudge.org/external/2/p247.pdf) ![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA247/59eed8bd2abe0c1c58fd6b83bbb9d0a70ea1eb75.png)

Input Format

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Output Format

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