#include <bits/stdc++.h>

using namespace std;

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

    if (n == 0) {
        cout << 0 << endl;
        return 0;
    }
    
    vector<int> vt;
    while (n > 0) {
        vt.push_back(n % 7);
        n /= 7;
    }

    reverse(vt.begin(), vt.end());
    for (int i = 0; i < vt.size(); ++i) {
        cout << vt[i];
    }
    cout << endl;
    return 0;
}