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#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;
}