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

int main()
{
    int i,n,c = 0,t,x;
    cin>>n>>x;
    for(int i = 1;i <= n;i++){
    	t = i;
    	while(t != 0){
    		if(t % 10 == x) c++;
    		t = t / 10;
		} 
	}
	
	cout<<c;
    return 0;
}
/**************************************************************
	Problem: 1993
	User: admin
	Language: C++
	Result: Accepted
	Time:94 ms
	Memory:2072 kb
****************************************************************/