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#include <iostream>
using namespace std;

typedef unsigned long long int huge;

unsigned int f(huge n)
{
	int d, sum = 0;
	while (n != 0)
	{
		d = n % 10;
		sum += d * d;
		n = n / 10;
	}
	return sum;
}

bool test(huge k, huge kn)
{
	return k * f(kn) == kn;
}

int main()
{
	int answer = 0;
	huge k, a, b, foo, kn;
	cin >> k >> a >> b;
	foo = k * 1458;
	if (k > a) a = k;
	if (b > foo) b = foo;
	if (a <= b)
	{
		// k <= a <= b <= foo
		kn = (a / k) * k + ((a == k) ? 0 : 1) * k;
		while (kn <= b)
		{
			if (test(k, kn)) ++answer;
			kn += k;
		}
	}
	cout << answer;
	return 0;
}