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

using namespace std;

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