#include <iostream>
using namespace std;
int n,ans;
bool yes = true;
int main()
{
	cin >> n;
	for (int i = 1;i <= n;i++)
	{
		if (i % 7 == 0)
			continue;
		int j = i;
		while (j != 0)
		{
			if (j % 10 == 7)
			{
				yes = false;
				break; 
			}
			j /= 10;
		}
		if (yes == true)
			ans += i * i;
		yes = true;
	}
	cout << ans;
	return 0;
}