#include<iostream>
#include<algorithm>
#include<string>
using namespace std;
int main() {
  int n;
  cin >> n;
  string s="";
  if(n==0) {
      cout << 0  << endl;
      return 0;
  }
  while(n>0) {
      s+=to_string(n%7);
      n/=7;
  }
  reverse(s.begin(),s.end());
  cout << s << endl;
}