#include<iostream>
#include<vector>
#include<algorithm>
#include<cmath>
#include<string>

using namespace std;

int main(){
	int  n;
	cin >> n;
	
	int b;
	string res = "";
	while(true){
		b = n%7;
		res.push_back(to_string(b)[0]);
		if(n/7 == 0){
			if(n/7 == 1)res.push_back('1');
			break;
		}else{
			n /= 7;
		}
	}

	for(int i=res.length()-1; i>-1; i--) cout << res[i];
	cout << endl;

}