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

int main() {
	int n,n7;
	stack<int> st;
	
	cin >> n;
	
	do{
		st.push(n % 7);
		n /= 7;
	}while(n != 0);
	
	while(!st.empty()){
		cout << st.top();
		st.pop();
	}
	
	cout << endl;
	return 0;
}