import java.util.Scanner;
import java.util.Stack;

public class Main {
	
	public static void main(String[] args){
		Scanner s = new Scanner(System.in);
		String str = s.next();
		s.close();
		
		long l = Long.parseLong(str);
		long ltmp = l;
		Stack<Long> stack = new Stack<Long>();
		
		while(true){			
			stack.push(ltmp%7);
			if(ltmp/7 < 7){
				stack.push(ltmp/7);
				break;
			}
			ltmp = ltmp/7;
		}
		long ans = 0;
		long pow = stack.size()-1;
		while(!stack.empty()){
			ans += stack.pop()* (long)Math.pow(10, pow);
			pow--;
		}
		System.out.println(ans);
	}

}