#include<iostream>
using namespace std;
int main()
{
	long long n = 0, x = 0, k = 0, k1 = 0, count = 0;
	cin >> n >> x;
	for (int i = 0; i <=n; i++)
	{
		if (i == x)
			count++;
		else
		{
			k = i;
			while (k != 0)
			{
				k1 = k % 10;
				k = k / 10;
				if (k1 == x)
					count++;
			}
		}
	}
	cout << count << endl;
	return 0;
}