/* -*- coding: utf-8 -*-
 *
 * 499.cc: No.499 7進数変換 - yukicoder
 */

#include<cstdio>
#include<cstdlib>
#include<cstring>
#include<cmath>
#include<iostream>
#include<string>
#include<vector>
#include<map>
#include<set>
#include<stack>
#include<list>
#include<queue>
#include<deque>
#include<algorithm>
#include<numeric>
#include<utility>
#include<complex>
#include<functional>
 
using namespace std;

/* constant */

/* typedef */

typedef vector<int> vi;

/* global variables */

/* subroutines */

/* main */

int main() {
  int n;
  cin >> n;

  if (n == 0) {
    puts("0");
    return 0;
  }

  vi v;
  while (n > 0) {
    v.push_back(n % 7);
    n /= 7;
  }

  for (int i = v.size() - 1; i >= 0; i--) printf("%d", v[i]);
  putchar('\n');
  return 0;
}