#include <bits/stdc++.h>

using namespace std;

void test_case() {
    int n, k, ans = 0;
    cin >> n >> k;
    int current = 0;
    for (int i = 1; i <= n; ++i) {
        int x = i, pw = 1;
        while (x) {
            pw = (10ll * pw) % k;
            x /= 10;
        }
        current = (1ll * pw * current + i) % k;
        ans += (current == 0);
    }
    cout << ans << '\n';
}

int main() {
    ios::sync_with_stdio(false); cout.tie(nullptr); cin.tie(nullptr);
    test_case();
    // int tc; cin >> tc;
    // while (tc--) {
    //     test_case();
    // }
    return 0;
}