#include<stdio.h>
#include<math.h>
int main()
{
    double r,a,b,c,t;
    double x1,x2;
    while(scanf("%lf%lf",&r,&a)!=EOF)
    {
        t=-1.0;
        b=r-a;
        c=r*r*r/a/2-2*r*r+a*r;
        if(b*b-4*c<0)
        {
            printf("Oh, my god!\n");
            continue;
        }
        x1=(-b+sqrt(b*b-4*c))/2;
        x2=(-b-sqrt(b*b-4*c))/2;
        if(x1>=0&&x1<=r)
            t=x1;
        else if(x2>=0&&x2<=r)
            t=x2;
        if(t>=0&&t<=r)
                printf("%.2lf\n",t);
        else
            printf("Oh, my god!\n");
    }
    return 0;
}