using System;

public class Program

{

    static int BinaryTilHeltal() {

        Console.Write("Enter the Binary Number : ");

        int binaryNumber = Convert.ToInt32(Console.ReadLine());

        int decimalValue = Convert.ToInt32(binaryNumber.ToString(), 2);           

        return decimalValue;

    }

    static string HeltalTilBinær() {

        Console.Write("Enter the Decimal Number : ");

        int number = Convert.ToInt32(Console.ReadLine());

        string Result = string.Empty;

        for (int i = 0; number > 0; i++)

        {

            Result = number % 2 + Result;

            number = number / 2;

        }

        return Result;

    }

    public static void Main()

    {

        Console.WriteLine("Resultatet er: {0}", HeltalTilBinær());

    }

}