#include<bits/stdc++.h>
using namespace std;
int main(){
	int n,x,h=0,j,a;
	cin>>n>>x;
	for(;n>0;n--){
		j=n;
		a=0;
		while(j!=0){
			a=j%10;
			j=j/10;
			if(a==x){
				h++;
			}
		}
	}
	cout<<h;
}
/**************************************************************
	Problem: 1469
	User: linzihang
	Language: C++
	Result: Accepted
	Time:23 ms
	Memory:2072 kb
****************************************************************/