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

int main() {
	int n;
	std::cin >> n;
	std::string str_n7 {""};

	for (;;) {
		if (n == 0) {
			break;
		}
		str_n7 += std::to_string(n % 7);
		n /= 7;
	}

	std::reverse(str_n7.begin(), str_n7.end());

	std::cout << std::stol(str_n7) << "\n";
}