#include <bits/stdc++.h>

using namespace std;

int main() {
    int n, x, cnt = 0;
    cin >> n >> x;
    for (int i = 1; i <= n; i++) {
        int t = i;
        //注意这里的数位分离技巧
        while (t > 0) {
            int ys = t % 10;
            if (ys == x) cnt++;
            t /= 10;
        }
    }
    printf("%d", cnt);
    return 0;
}