using System;

public class Program

{

    public static void Main()

    {

        int i;

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

        int[] a=new int[50];

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

          a[i]=n%8;

          n=n/8;

        }

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

           Console.Write(a[i]);

        }

        //Console.WriteLine("Hello World");

    }

}