using System;

public class calc

{

    int a,b;

    public calc()

    {

        a++;

        b++;

        Console.WriteLine(a);

        Console.WriteLine(b);

    }

     static calc()

    {

        Console.WriteLine("Hello");     

    }

    public calc(calc d)

    {

        this.a=d.a;

        this.b=d.b;

        Console.WriteLine("Hello");

    }

    //private calc()

    //{

    //  Console.WriteLine("Hellow21");

    //}

​

}

public class Program

{

    public static void Main()

    {

        Console.WriteLine("Hello World");

        calc c= new calc();

        calc c2= new calc();

    }

}