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

int main()
{
	int n; cin >> n;

	vector<int>a;
	while (n) {
		a.push_back(n % 7);
		n /= 7;
	}


	for (int i = a.size()-1; i >= 0; i--) {
		cout << a[i];
	}
	if (n == 0)cout << 0;
	cout << endl;



    return 0;
}