#include <bits/stdc++.h>
using namespace std;
#ifdef LOCAL
  #include "settings/debug.cpp"
  #define _GLIBCXX_DEBUG
#else
  #define Debug(...) void(0)
#endif
#define rep(i, n) for (int i = 0; i < (n); ++i)
using ll = long long;
using ull = unsigned long long;

int main() {
  int n;
  cin >> n;
  string s = "";
  while (n) {
    s += (char) ('0' + n % 7);
    n /= 7;
  }
  reverse(s.begin(), s.end());
  if (s == "") s = "0";
  cout << s << endl;
  return 0;
}