import java.util.Scanner;

class Main{
	public static void main(String[] args) {
		Scanner sc=new Scanner(System.in);
		int n=sc.nextInt(),a[]=new int[11],t=0,i;
		sc.close();
		do {
			a[t]=n%7;
			t++;
			n/=7;
		}while(n>0) ;
		for(i=t;i>0;i--) System.out.print(a[i-1]);
	}
}