#include<iostream>
#include<algorithm>
#include<cstdio>
#include<cstdlib>
#include<vector>
#include<string>
#include<sstream>
#include<cmath>
#include<numeric>
#include<map>
#include<stack>
#include<queue>
using namespace std;


int main(void) {

  long long int n;
  cin >> n;
  string t = "";
  long long int a = 7;
  while( a <= n ) a *= 7;
  a /= 7;
  while( a != 0 ){
    cout << n/a;
    n %= a;
    a /= 7;
  }
  cout << endl;

  return 0;
}






// EOF