#include <iostream>
#include <string>
using namespace std;
int main(int argc, char* argv[])
{
	int N;
	cin>>N;
	if (N<7){
		cout<<N<<endl;
		return 0;
	}
	string s;
	while (N>=7){
		int n=N%7;
		N/=7;
		s+='0'+n;
	}
	s+='0'+N;
	for (int i=s.length()-1;i>=0;i--){
		cout<<s[i];
	}
	cout<<endl;
	return 0;
}