#include<iostream>
using namespace std;
int main(){
	int n, x, y=1, m=0, t1=1, ans=0, t2, n2;
	cin>>n>>x;
	for(n2=n;n2>0;n2--){
		while(n2/t1>=10){
		t1*=10;
		y++;
		}
		for(t2=0;t2<=y;t2++){
			if(n2%10==x){ans+=1;}
			n2=n2/10;
		}
		n2=n-m;
		m++;
		y=1;
		t1=1;
	}
	cout<<ans;
	return 0;
}