#include <stdio.h>
int main()
{
	int n = 0; 
	int x = 0;
	int count = 0;
	scanf("%d %d", &n, &x);
	for (int i = 1; i <= n; i++)
	{
		int k = i;
		while (k)
		{
			if (k % 10 == x)
			{
				count++;
			}
			k /= 10;
		}
	}
	printf("%d\n", count);
	return 0;
}