import java.util.*;

public class Main {
	static Scanner sc = new Scanner(System.in);
	public static void main(String[] args) {
		int n = sc.nextInt();
		String ans = "";
		while (true) {
			if (n/7 == 0) {
				ans += n%7;
				break;
			}
			else {
				ans += n%7;
				n /= 7;
			}
		}
		
		StringBuilder sb = new StringBuilder(ans);
		System.out.println(sb.reverse());
	}
}