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

int main(){
	int n;
	vector<int> vec;
	cin >> n;
	if(n == 0){
		cout << 0 << endl;
		return 0;
	}
	while(n){
		vec.push_back(n % 7);
		n /= 7;
	}
	for(int i = vec.size() - 1;i >= 0;i--) cout << vec[i];
	cout << endl;
	return 0;
}