import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collections;
import java.util.List;
import java.util.PriorityQueue;
import java.util.Scanner;

public class Main {

	public static final int INF = Integer.MAX_VALUE / 2 - 1;

	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		
		System.out.println(Long.toUnsignedString(sc.nextLong(), 7));
	}
}