using System;

​

public class Program

{

    public static void Main() //ЗАДАЧА 6

    {

        int i;

        int[] a = new int[10];

        int n = int.Parse(Console.ReadLine());

        for (i = 0; n > 0; i++)

        {

            a[i] = n % 2;

            n = n / 2;

        }

        for (i = i - 1; i >= 0; i--)

        {

            Console.Write(a[i]);

        }

    }

}