using System;

using System.Collections.Generic;

public class Program

{

    public static void Main()

    {

        Console.WriteLine("Hello World");

        List<Human> list=new List<Human>();

        list.Add(new Human(10,10));

        list.Add(new Male(20,20,20));

        list.Add(new Female(30,30,30));

        foreach(Human h in list)

            Console.WriteLine(h);

        /*Console.WriteLine("I am Human, tall={0}, weight={1}", h.tall, h.weight);

        Console.WriteLine("I am Male, tall={0}, weight={1}, Jlong={2}", m.tall, m.weight, m.Jlong);

        Console.WriteLine("I am Female, tall={0}, weight={1}, Bsize={2}", f.tall, f.weight, f.Bsize);

        */

    }

}

class Human

{

    public int tall;

    public int weight;

    //public Human(){}

    public Human(int _tall, int _weight)

    {

        tall=_tall;

        weight=_weight;

    }

}

class Male:Human

{

    public int Jlong;

​

    public Male(int t, int w, int _Jlong):base(t, w)

    {

        Jlong=_Jlong;

    }

}

class Female:Human

{

    public int Bsize;

​

    public Female(int t, int w, int _Bsize):base(t, w)

    {

        Bsize=_Bsize;

    }

}