#include <iostream>
#include <string>
using namespace std;

int main() {
	int n;
	cin >> n;
	
	if (n == 0) { cout << "0" << endl; return 0; }
	
	string s;
	while (n > 0) {
		s += (char)('0' + n % 7);
		n /= 7;
	}
	for (int i = s.length() - 1; i >= 0; i--) {
		cout << s[i];
	}
	cout << endl;
	
	return 0;
}