#include<stdio.h>
#include<math.h>
int main()
{
    int choice,i=1;
    double u,v,t,s,a,b,d,e;
    while(scanf("%d",&choice)!=EOF && choice!=0)
    {
        switch(choice)
        {
        case 1:
            scanf("%lf%lf%lf",&u,&v,&t);
            b=v-u;
            a=b/t;
            d=(u+v)/2;
            s=d*t;
            printf("Case %d: %.3lf %.3lf\n",i,s,a);
            break;
        case 2:
            scanf("%lf%lf%lf",&u,&v,&a);
            b=v-u;
            t=b/a;
            d=(v*v)-(u*u);
            e=2*a;
            s=d/e;
            printf("Case %d: %.3lf %.3lf\n",i,s,t);
            break;
        case 3:
            scanf("%lf%lf%lf",&u,&a,&s);
            b=(u*u)+(2*a*s);
            v=sqrt(b);
            d=v-u;
            t=d/a;
            printf("Case %d: %.3lf %.3lf\n",i,v,t);
            break;
        case 4:
            scanf("%lf%lf%lf",&v,&a,&s);
            b=(v*v)-(2*a*s);
            u=sqrt(b);
            d=v-u;
            t=d/a;
            printf("Case %d: %.3lf %.3lf\n",i,u,t);
            break;
 
        }
        i++;
    }
    return 0;
}