#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++) {
        string str = to_string(i);
        for (int j = 0; j < str.size(); j++)
            b[str[j] - '0']++;
    }
    cout << b[x] << endl;
    return 0;
}