static double newton(int x, int y)
{

       if(x > 33 || y > 33)
       {
       cout << -1 <<;
       }
       else if(x == 0 || x == y)
       {
       return 1;
       }
       else if(x>0 && y>0 && y>x)
       {
       return newton(x-1, y-1) + newton(x-1,y);
       }
       }