#include <iostream>
#include <cmath>

using namespace std;

int main() {
    int n,k,j,counter = 0;
    cin >> n >> k;      //Input

    long long actual_rest = 1ll;
    long long multiplicator_rest = (long long)(10ll % k);
    
    for (int i = 2; i <= n; i++) {
        j = i;
        while (j > 0) {
            actual_rest*=multiplicator_rest;
            actual_rest%=k;
            j /= 10;
        }
        actual_rest += (i % k);
        actual_rest %= k;
        if (!actual_rest) {
            counter++;
        }
    }
    cout << counter << endl;
    return 0;
}