硬币水题II

#include<stdio.h>
int main()
{
    int _case;
    double p;
    scanf("%d",&_case);
    while(_case--)
    {
        scanf("%lf",&p);
        printf("%.2lf\n",1/p/(1-p));
    }
    return 0;
}

http://www.bnuoj.com/bnuoj/problem_show.php?pid=29064