UVA11181 条件概率 Probability|Given

Description

[problemUrl]: https://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&category=23&page=show_problem&problem=2122 [PDF](https://uva.onlinejudge.org/external/111/p11181.pdf) ![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA11181/e7ff179b70470ecd5bcdd2c359c9dec606f308e3.png)

Input Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA11181/c4a19b7e08ff7186da01119426d98cce50c64096.png)

Output Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA11181/67d5194f9e66ef7ce5d79ddcd6cfb38fc83c93ca.png)