#include<bits/stdc++.h>
#include<unordered_set>
#include<unordered_map>
using namespace std;

int main(){
	int n;
	cin >> n;
	vector<int> v;
	while (n){
		v.push_back(n % 7);
		n /= 7;
	}
	reverse(v.begin(), v.end());
	for (int i = 0; i < v.size(); i++){
		cout << v[i];
	}
	cout << endl;
	return 0;
}