using System;

public class Program

{

    public virtual void draw(){

        Console.WriteLine("c++");

    }

​

public class Program1:Program{

    public override void draw(){

        Console.WriteLine("python");

    }

}

public class Program2:Program{

    public override void draw(){

        Console.WriteLine("java");

    }

}

 public static void Main(String[] args)

    {

        Program p=new Program();

        p.draw();

        p=new Program1();

        p.draw();

        p=new Program2();

        p.draw();

}

}