#include <algorithm>  // for reverse
#include <iostream>
#include <sstream>
//#include <string>

using namespace std;

int main(int argc, char *argv[])
{
	long long int N;
	cin >> N;

	stringstream ss;
	//while (N > 0) ss << N % 7, N /= 7;
	do {
		ss << N % 7, N /= 7;
	} while (N > 0);

	string s = ss.str();
	reverse(s.begin(), s.end());
	cout << s;

	return 0;
}