import java.util.*;

public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int N = sc.nextInt();
        ArrayList<Integer> L = new ArrayList<>();
        while(true){
            L.add(N%7);
            N/=7;
            if(N==0)break;
        }
        for(int i=L.size()-1; i>=0; i--){
            System.out.print(L.get(i));
        }System.out.println();
    }
}