#include <bits/stdc++.h>
#include <atcoder/all>
using namespace std;
using namespace atcoder;
using ll = long long;
using ld = long double;

ll N;
string ans;

int main() {
  cin >> N;
  while (N > 0) {
    ans += '0' + N % 7;
    N /= 7;
  }
  reverse(ans.begin(), ans.end());
  cout << ans << endl;
  return 0;
}