include<bits/stdc++.h>

using namespace std; int m,t,key,ans,a; int main(){

cin>>m>>t;
for(int i=0;i<m;i++){
	a=i;
	key=0;
	while(a){
		if(a%10==t){
			key=1;
			break;
		}
		a/=10;
	}
	if(key==1) ans++;
}
cout<<m-ans;
return 0;

}