import java.util.*;

public class Main {
	public static void main (String[] args) {
    	Scanner sc = new Scanner(System.in);
    	int n = sc.nextInt();
    	StringBuilder sb = new StringBuilder();
    	while (n > 0) {
    	    sb.append(n % 7);
    	    n /= 7;
    	}
    	System.out.println(sb.reverse());
    }
}