using System;

public class Program

{

    public static void Main()

    {

        int x , t=0;

        double sum=0 ;

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

        while(x>0)

        {

         sum=sum+ x%2 * Math.Pow(10,t);

            t++ ;

            x=x/2 ;

        }

        Console.WriteLine(sum);

    }

}

​