// acwing 3400 thu
#include <iostream>
using namespace std;
int n, k;
int count(int x) {
int res = 0;
while (x) {
res += (x % 10 == k);
x /= 10;
}
return res;
}
int main() {
cin >> n >> k;
int res = 0;
for (int i = 1; i <= n; ++i) {
res += count(i);
}
cout << res << endl;
return 0;
}