#include<bits/stdc++.h>
using namespace std;
int ss(int n,int m){
	int s=0,i,a=n;
	while(a){
		i=a%10;
		a/=10;
		if(i==m){
			s++;
		}
	}
	return s;
}
int main()
{
	int n,x,s=0;
	cin>>n>>x;
	for(int i=1;i<=n;i++){
		s+=ss(i,x);
	}
	cout<<s;
	return 0;
}

/**************************************************************
	Problem: 1469
	User: zzz
	Language: C++
	Result: Accepted
	Time:25 ms
	Memory:2072 kb
****************************************************************/