UVA 11715 - Car

#include
#include
int main()
{
double u,v,s,t,a;
int te=1,n;
while(scanf("%d",&n)==1 && n!=0)
{
 if(n==1)
   {
   scanf("%lf%lf%lf",&u,&v,&t);
   s=(u+v)*t/2;
   a=(v-u)/t;
   printf("Case %d: %.3lf %.3lf\n",te++,s,a);
   }
 else if(n==2)
   {
   scanf("%lf%lf%lf",&u,&v,&a);
   t=(v-u)/a;
   s=(u+v)*t/2;
   printf("Case %d: %.3lf %.3lf\n",te++,s,t);
   }
 else if(n==3)
   {
   scanf("%lf%lf%lf",&u,&a,&s);
   v=sqrt(u*u+2*a*s);
   t=(v-u)/a;
   printf("Case %d: %.3lf %.3lf\n",te++,v,t);
   }
 else if(n==4)
   {
   scanf("%lf%lf%lf",&v,&a,&s);
   u=sqrt(v*v-2*a*s);
   t=(v-u)/a;
   printf("Case %d: %.3lf %.3lf\n",te++,u,t);
   }

}
return 0;
}