#define _USE_MATH_DEFINES
#include <cstdio>
#include <iostream>
#include <sstream>
#include <fstream>
#include <iomanip>
#include <algorithm>
#include <cmath>
#include <complex>
#include <string>
#include <vector>
#include <list>
#include <queue>
#include <stack>
#include <set>
#include <map>
#include <bitset>
#include <numeric>
#include <limits>
#include <climits>
#include <cfloat>
#include <functional>
#include <iterator>
using namespace std;

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

    string s;
    while(n > 0){
        s += (char)((n % 7) + '0');
        n /= 7;
    }

    if(s.size() == 0)
        s = "0";
    else
        reverse(s.begin(), s.end());
    cout << s << endl;

    return 0;
}