奶牛和轿车 Cows and Cars
题目描述
[problemUrl]: https://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&category=16&page=show_problem&problem=1432
[PDF](https://uva.onlinejudge.org/external/104/p10491.pdf)
![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA10491/b25d27a5e3c13d6e2fa5b6a343e8f5ecdf3cba26.png)
输入输出格式
输入格式
![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA10491/58bbf50a8476f0749164e40def44a03edc74ddba.png)
输出格式
![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA10491/c7613df82a6f6ac2a6927dfb4d1f7db990efe460.png)
输入输出样例
输入样例 #1
2 1 1
5 3 2
2000 2700 900
输出样例 #1
0.66667
0.52500
0.71056