// No.499 7進数変換
// https://yukicoder.me/problems/no/499
//

#include <iostream>
#include <vector>
#include <algorithm>

using namespace std;
vector<int> solve(int N);


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

    vector<int> ans = solve(N);
    for (auto a: ans)
        cout << a;
    cout << endl;
}

vector<int> solve(int N) {
    vector<int> res;
    do {
        res.push_back(N % 7);
        N /= 7;
    } while (N > 0);

    reverse(res.begin(), res.end());
    return res;
}