#include <limits>
#include <iostream>
#include <algorithm>
#include <vector>
#include <iomanip>
#include <map>
#include <queue>

static const int MOD = 1000000007;
using ll = long long;
using u32 = unsigned;
using namespace std;

template<class T>
constexpr T INF = ::numeric_limits<T>::max() / 32 * 15 + 208;

int main() {
    int n;
    cin >> n;
    string s;
    s += to_string(n%7);
    while (n/7) {
        n /= 7;
        s += to_string(n%7);
    }

    reverse(s.begin(), s.end());
    cout << s << "\n";
    return 0;
}