import java.util.*;

class Main{
    public static void main(String args[]){
        Scanner cin = new Scanner(System.in);
        int target = cin.nextInt();
        
        int tmp = target;
        int mod = target%7;
        if(mod>0){
            System.out.print(mod);
        }
        while(tmp>6){
            tmp = tmp/7;
            System.out.print(tmp);
            if(tmp==1){
                System.out.print(0);
            }
        }
    }
}