#include <bits/stdc++.h>
using namespace std;

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

    cout << ans;
}