#include <bits/stdc++.h>

using namespace std;
const int N = 10;
int b[N];

int main() {
    int n, x;
    scanf("%d %d", &n, &x);
    for (int i = 1; i <= n; i++) {
        int tmp = i, num;
        while (tmp > 0) {
            num = tmp % 10;
            b[num]++;
            tmp /= 10;
        }
    }
    printf("%d", b[x]);
    return 0;
}