#include<iostream>
using namespace std;
int main(){
	int x,n,a=0;
	cin>>x>>n;
	for(int i=1;i<=n;i++){
		int b=i,c;
		while(b!=0){
			if(b%10==x)
				a++;
			b/=10; 
		}
	}
	cout<<a;
}