/*No.499 7進数変換*/
import java.io.*;
public class No499 {
	public static void main(String[] args) {
		int TransNumber,n=0;
		String s_number=new String();
		try(BufferedReader input =new BufferedReader(new InputStreamReader(System.in))){
			TransNumber=Integer.parseInt(input.readLine());
			while(TransNumber>=(int)Math.pow(7, n)){
				n++;
			}
			while(n>=0){
				s_number=s_number.concat(Integer.toString(TransNumber/(int)Math.pow(7, n)));
				TransNumber%=(int)Math.pow(7, n);
				n--;
			}
			System.out.println(Long.parseLong(s_number));
		}catch(Exception e){
			e.printStackTrace();
		}
	}
}