using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace ConsoleApp2
{
    class Program
    {
        static void Main(string[] args)
        {

        }
    }


    public abstract class Solid
    {
        abstract public double Volume();
        abstract public double Surface();
    }


    public abstract class Polyhedron : Solid
    {
        public int faces;
        public int edges;
        public int vertices;

    }

    public class Cuboid : Polyhedron
    {
        public int a, b, c;

        public Cuboid(int _a, int _b, int _c)
        {
            a = _a;
            b = _b;
            c = _c;
        }

        public override double Surface()
        {
            //2(ab + ac + bc)
            return 2 * (a * b + a * c + b*c );
        }

        public override double Volume()
        {
            return a * b * c;
        }

        public override string ToString()
        {
            return " Volume = " + Volume() + " Surface = " + Surface();
        }

    }

    public class Cube : Cuboid
    {
        public Cube(int _a)
        {
            a = _a;
        }

        public override double Surface()
        {
            return 6 * (a * a);
        }
        public override double Volume()
        {
            return (a * a * a);
        }
    }

    public class Sphere : Solid
    {
        public double R;

        public override double Surface()
        {
            return 4 * Math.PI * (R * R);
        }

        public override double Volume()
        {
            return 1.33 * Math.PI * (R * R * R);
        }
    }
    public class Cone : Solid
    {
        public double R, L, H;
        public override double Surface()
        {
            return Math.PI * (R * R) + Math.PI * R * L;
        }

        public override double Volume()
        {
            return 0.33 * Math.PI * (R * R) * H;
        }
    }
    public class Cylinder : Solid
    {
        public override double Surface()
        {
            throw new NotImplementedException();
        }

        public override double Volume()
        {
            throw new NotImplementedException();
        }
    }
}