#include <bits/stdc++.h>
using namespace std;
using ll = long long;
using Graph = vector<vector<int>>;
long long GCD(long long a,long long b) {
  if(a%b == 0) return b;
  return GCD(b,a%b);
}
int main() {
  long long N; cin >> N;
  string ans = "";
  while(true) {
    ans += to_string(N % 7);
    N /= 7;
    if(N == 0) {
      break;
    }
  }
  reverse(ans.begin(),ans.end());
  cout << ans << endl;
}