#define _GLIBCXX_DEBUG
#define ll long long
#define INF 1000000000;
#define INF_B 1000000000000000000;
#include <bits/stdc++.h>
using namespace std;
using Graph = vector<vector<int>>;

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