#include <bits/stdc++.h>
using namespace std;
int main(){
	int n,x,g=0,h;
	cin>>n>>x;
	for(int i=1;i<=n;i++){
		h=i;
		while(h>0){
			if(h%10==x) g++;
			h/=10;
		}
	}
	cout<<g;
}
/**************************************************************
	Problem: 1469
	User: wangyiyang
	Language: C++
	Result: Accepted
	Time:22 ms
	Memory:2072 kb
****************************************************************/