import java.util.*;

public class Main {
  public static void main(String[] args) {
    Scanner sc = new Scanner(System.in);
    int N = sc.nextInt();
    if(N == 0) {
      System.out.println(0);
    } else {
      String ans = "";
      while(N > 0) {
        int r = N % 7;
        ans = String.valueOf(r) + ans;
        N -= r;
        N /= 7;
      }
      System.out.println(ans);
    }
  }
}