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

int main()
{
	long n; cin>>n;
	if (n==0) return cout<<"0\n", 0;

	string res;
	while (n) {
		res+=char(n%7+'0');
		n/=7;
	}
	cout<<string(rbegin(res), rend(res))<<endl;
}