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

int main() {
	int n;
	cin >> n;
	stack<int>s;
	do {
		s.push(n % 7);
		n /= 7;
	} while (n);
	while (s.size())cout << s.top(), s.pop();
	cout << endl;
	return 0;
}