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

int main()
{
	int n, x, cnt = 0;
	cin >> n >> x;

	for (int i = 1; i <= n; i++)
	{
		int t = i;
		while (t)
		{
			if (t % 10 == x)
				cnt++;
			t /= 10;
		}
	}
	cout << cnt << endl;
	return 0;
}