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