import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;

import static java.lang.System.in;

public class Main {
    public static void main(String[] args) throws IOException {
        BufferedReader reader = new BufferedReader(new InputStreamReader(in));
        long N = Long.parseLong(reader.readLine());
        System.out.println(toSeptenaryString(N));
    }

    private static String toSeptenaryString(long l) {
        StringBuilder s = new StringBuilder();
        if(l ==0) {
            return "0";
        }
        while (l != 0) {
            s.append(l % 7);
            l = l / 7;
        }
        return s.reverse().toString();
    }
}