#include <bits/stdc++.h>

using namespace std;

#define REPR(i, n) for(int i = n; i >= 0; i--)

int main() {
    ios::sync_with_stdio(false);
    cin.tie(0);
    cout.tie(0);

    int n;
    cin >> n;

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

    REPR(i, a.size() - 1) {
        cout << a[i];
    }
    cout << endl;
    return 0;
}