#include <iostream>
#include <string>
#include <algorithm>
using namespace std;
int main(){
	int N;
	cin >> N;
	string S;
	while (N > 0 || S.empty()){
		S += '0' + N % 7;
		N /= 7;
	}
	reverse(S.begin(), S.end());
	cout << S << endl;
}