#include <iostream>
#include <cstring>
#include <algorithm>
using namespace std;
int xjx(int a,int b){
int sum=0;
while(a){
if(a%10==b){
sum++;
}
a/=10;
}
return sum+a;
}
int main()
{
int a,b,cnt=0;
cin>>a>>b;
for (int i = 1; i <= a; i ++ ){
cnt+=xjx(i,b);
}
cout<<cnt;
return 0;
}