#include <algorithm>
#include <array>
#include <cmath>
#include <cstdio>
#include <deque>
#include <iomanip>
#include <iostream>
#include <numeric>
#include <optional>
#include <queue>
#include <sstream>
#include <unordered_map>
#include <unordered_set>
#include <vector>

using namespace std;

int main() {
    int32_t n;
    cin >> n;
    if (n == 0) {
        cout << 0 << endl;
        return 0;
    }
    string ans;
    while (n > 0) {
        ans += char('0' + n % 7);
        n /= 7;
    }
    reverse(ans.begin(), ans.end());
    cout << ans << endl;
    return 0;
}