package yukicoder;

import java.util.Scanner;

public class N499
{
	public static void main(String[] args)
	{
		Scanner sc=new Scanner(System.in);
		long N=sc.nextLong();
		long N7=0;
		int i=0;
		do
		{
			N7+=(N%7)*(long)Math.pow(10, i);
			N/=7;
			i++;
		}while(N>0);
		System.out.println(N7);
	}
}