#include<iostream>
#include<math.h>
using namespace std;
int main(){
  int n;
  cin >> n;
  int i=1,d;
  long ans=0;
  while(n > 0){
    d = n%((int)pow(7,i));
    ans += (long)pow(10,i-1)*(d/(int)pow(7,i-1));
    i++;
    n -= d;
  }
  cout << ans << endl;
}