#include <iostream>
#include <string>
#include <algorithm>

using namespace std;

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

	string s;

	while (n > 0) {
		s += to_string((n % 7));
		n /= 7;
	}

	reverse(s.begin(), s.end());
	cout << s << endl;
	return 0;
}