//丹阳新区实小路彦
#include <bits/stdc++.h>
using namespace std;

int main()
{
    int n, x;
    cin >> n >> x;
    int res = 0;
    for (int i = 1; i <= n; i++)
        for (int j = i; j; j /= 10)
            if (j % 10 == x)
                res++;
    cout << res << endl;
    return 0;
}