import java.util.ArrayDeque;
import java.util.Arrays;
import java.util.Scanner;

class Main {
	public static void main(String[] args) {
		new Main().run();
	}

	void run() {
		Scanner sc = new Scanner(System.in);
		long N = sc.nextLong();
		ArrayDeque<Long> deque = new ArrayDeque<>();
		while (N > 0) {
			deque.addLast(N % 7);
			N /= 7;
		}
		while (!deque.isEmpty()) {
			long v = deque.pollLast();
			System.out.print(v);
		}
		System.out.println();
	}

	void tr(Object... objects) {
		System.out.println(Arrays.deepToString(objects));
	}
}