#include <bits/stdc++.h>

using namespace std;

int main(void) {
  int n;
  cin >> n;

  string ans = "";
  if (!n) ans = "0";
  while (n) {
    ans = (char)(n % 7 + '0') + ans;
    n /= 7;
  }
  cout << ans << endl;

  return 0;
}