#include<iostream>
using namespace std;
int main()
{
	int a = 0, b = 0, n = 0, x = 0, sum = 0,w=0;
	cin >> n >> x;
	for (int i = 1;i <= n;i++)
	{
		w = i;
		do {
			a = w % 10;
			if (a == x)
			{
				sum += 1;
			}
			b = w / 10;
			w = b;
		} while (b != 0);
	}
	cout << sum << endl;
	return 0;
}