import java.util.ArrayList;
public class Flex
{
    public static void main(String[] args)
    {
        ArrayList<Shape> al = new ArrayList<>();
        al.add(new Circle(5));
        al.add(new Rectangle(6,8));
        al.add(new Triangle(3,4,5));
        System.out.println(totalArea(al));
        System.out.println(silly(new Triangle(3,4,5)));
    }
    public static double totalArea(ArrayList<Shape> al)
    {
        double out = 0;
        for(Shape s: al)
        {
            out += s.area();
        }
        return out;
    }
    public static double silly(Shape s)
    {
        return s.area() + s.diameter() + s.perimeter();
    }
}