using System;

public class Program

{

public static string d2b(int d)

{

    int e=1,r;

    string bn ="";

    while ( e > 0)

        {

        e = d/2;// החלק השלם

        r = d%2;// השארית

        bn = r.ToString() + bn;

        d = e;

    }

    return bn;

}

    public static void Main()

    {

        int d;

        string b ="";

        int r, e = 1;

        d = Convert.ToInt32(Console.ReadLine());

        b = d2b(d);

        Console.WriteLine(b);

    }

}