UVA11731 Ex-circles

Description

[problemUrl]: https://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&category=117&page=show_problem&problem=2831 [PDF](https://uva.onlinejudge.org/external/117/p11731.pdf) ![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA11731/29bba11583811341af1a051afdae7511427284b1.png)

Input Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA11731/899e9671d23cb4ceee0b86fbab710a375d2cecef.png)

Output Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA11731/0197d6bc754be6f82a68c7badc3985c778026a40.png)