#include<stdio.h>
#include<math.h>

int main()
{
	int n,x,y;
	int i,j,k=0;
	int a[100000];
	
	scanf("%d %d",&n,&x);
	
	for(i=0;i<n;i++){
		a[i]=i+1;
		while(a[i]>0){
			if(a[i]%10==x)
				k++;
			a[i]=a[i]/10;
		}
	}
	
	printf("%d",k);
	
	return 0;
}