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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++) {
int tmp = i, num;
while (tmp > 0) {
num = tmp % 10;
b[num]++;
tmp /= 10;
}
}
printf("%d", b[x]);
return 0;
}