#include <bits/stdc++.h>
using namespace std;
int n, k;
// 返回 x 里面有几个 k
int f(int x)
{
    int res = 0;
    while (x > 0)
    {
        if (x % 10 == k)
            res++;
        x /= 10;
    }
    return res;
}
int main()
{
    cin >> n >> k;
    int ans = 0;
    for (int i = 1; i <= n; i++)
    {
        ans += f(i);
    }
    cout << ans;
    return 0;
}

#include <bits/stdc++.h>
using namespace std;
int n, k;
int main()
{
    cin >> n >> k;
    int ans = 0;
    for (int i = 1; i <= n; i++)
    {
        int now = 0;
        for (int j = i; j > 0; j /= 10)
            if (j % 10 == k)
                now++;
        ans += now;
    }
    cout << ans;
    return 0;
}