DecimalToBinaryNumber

using System;

//Using loops write a program that converts an integer number to its binary representation. The input is entered as long.
//The output should be a variable of type string. Do not use the built-in .NET functionality.

//  decimal             binary
//  0                       0
//  3                       11
//  43691               1010101010101011
//  236476736               1110000110000101100101000000

    class DecimalToBinaryNumber
    {
        static void Main()
        {
            int n = int.Parse(Console.ReadLine());
            string nbinary = null;
            int r = 0;
            while (n > 0)
            {
                r = n % 2;
                n /= 2;
                nbinary += r;
            }
            Console.WriteLine(nbinary);
            string nBinary2 = null;
            for (int i = nbinary.Length - 1; i >= 0; i--)
            {
                nBinary2 += nbinary[i];

            }
            Console.WriteLine(nBinary2);
        }
    }