#include <bits/stdc++.h>
using namespace std;

int main() {
    int n, x, count = 0;
    cin >> n >> x;

    for (int i = 1; i <= n; i++) {
        int temp = i;
        while (temp > 0) {
            if (temp % 10 == x) {
                count++;
            }
            temp /= 10;
        }
    }

    cout << count << endl;
    return 0;
}