抽奖 Honorary Tickets

题目描述

[problemUrl]: https://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&category=226&page=show_problem&problem=2995 [PDF](https://uva.onlinejudge.org/external/118/p11895.pdf) ![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA11895/62b6602f5154b04b821dcb5f7fdf0d8b08664b68.png)

输入输出格式

输入格式


![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA11895/fb19ab3d7ea2f7b0267ccc48ebe63811f3655fd0.png)

输出格式


![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA11895/da5c01f67dfce88ff751823e9d1c9c28f9a61cfa.png)

输入输出样例

输入样例 #1

3
2 1
1 1
2 1
2 2
2 2
6 4
1 3
6 4

输出样例 #1

1/1
2/3
25/54