using System;

​

public class Program

{

    public static void Main()

    {

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

        int decimalNumber = 0;

        int lastDigit = 0;

        int powerCounter = 0;

​

        while (n != 0)

        {

            lastDigit = n % 10;

            decimalNumber += lastDigit * (int)(Math.Pow(7, powerCounter));

            n = n / 10;

            powerCounter++;

        }

​

        decimalNumber++;

        string result = null;

​

        while (decimalNumber != 0)

        {

            int reminder = decimalNumber % 7;

            result = reminder  + result;

            decimalNumber /= 7;

        }

​

        Console.WriteLine(result);

    }

}