#include <stdio.h>
int main() {
    int n, c, count, j, m;
    int temp = 0;
    m = 0, count = 0;
    scanf("%d%d", &n, &c);
    for (int i = 1; i <= n; i++) {

        temp = i;
        while (temp > 0) {
            m = temp % 10;
            if (m == c)
                count++;
            temp = temp / 10;
        }
    }
    printf("%d", count);
}