include <bits/stdc++.h>

using namespace std;

int n,x,z=0,y=1; 

int main() {

cin>>n>>x;
while(y<=n){
	int a=y;
	while(a>=1){
		if(a%10==x){
			z++;
		}
		a=a/10;			
	}		
	y++; 
}
cout<<z;
return 0;

}