package yukicoder;

import java.util.Scanner;

public class Main {

	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int dec = sc.nextInt();
		String sep = "";
		int num = 7;
		int power = num;
		while(true){
			int work = dec / power;
			if(work <= 0){
				break;
			}
			power *= num;
			
		}
		while((power /= num) > 0){
			for(int i = 1 ; i <= num ; i++){
				int work = dec / (power*i);
				if(work <= 0){
					sep += Integer.toString(i-1);
					if(i != 1){
						dec %= (power*(i-1));
					}
					break;
				}
			}
		}
		System.out.println(sep);
	}

}