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

bool check(int k)
{
	while (k)
	{
		if (k % 10  <= 2 || k % 10 == 9) return true;
		k /= 10;
	}
	
	return false;
}

int main()
{
	int n;
	cin >> n;
	long long sum = 0;
	for (int i = 1; i <= n; i++)
	{
		if (check(i))
		{
			sum += i;
		}
	}
	
	cout << sum << endl;
	return 0;
}