using System;

public class Program

{

    public static void Main()

    {

         DecToBinClass bc = new DecToBinClass();

        Console.WriteLine("Input:");

        Console.Write("Enter a decimal number:");

        var input = Int32.Parse(Console.ReadLine());

        Console.WriteLine("Output:");

        Console.Write("The binary equivalent of " + input + " is: ");

        bc.deciToBinary(input);

    }

}

public class DecToBinClass

{

    public int deciToBinary(int num)

    {

        int bin;

        if (num != 0)

        {

            bin = (num % 2) + 10 * deciToBinary(num / 2);

            Console.Write(bin);

            return 0;

        }

        else

        {

            return 0;

        }

    }

}