#include <bits/stdc++.h>

using namespace std;

void rec(int idx)
{
  if(idx == 0) return;
  rec(idx / 7);
  cout << idx % 7;
}

int main()
{
  int N;
  cin >> N;
  if(N == 0) cout << 0 << endl;
  else rec(N);
}