#include <bits/stdc++.h>
using namespace std;

int main(){
	int i,n,x,t,c = 0;
	cin>>n>>x;
	for(i = 1;i <= n;i++){
		t = i;
		while(t != 0){
			if(t % 10 == x){
				c++;
			}
			t = t / 10;
		}
	}
	
	cout<<c<<endl;
}
/**************************************************************
	Problem: 1469
	User: admin
	Language: C++
	Result: Accepted
	Time:33 ms
	Memory:2072 kb
****************************************************************/