#include<stdio.h>
int main()
{
	int n, x;
	scanf("%d %d", &n, &x);
	int arr[1000] = { 0 };
	int i = 0;
	int count = 0;
	for (i = 0; i <= n; i++)
	{
		arr[i] = i ;
		int m = arr[i];
		while (m)
		{
			if (m % 10 == x)
				count++;
			m = m / 10;
		}
	}
	printf("%d", count);
	return 0;
}