#define _USE_MATH_DEFINES
#include <bits/stdc++.h>
using namespace std;
signed main() {
	ios::sync_with_stdio(false);
	cin.tie(0);
	int n, k;
	cin >> n >> k;
	int ans = 0;
	int a[2000001] = {};
	for (int i = 2; i <= n; i++) {
		if (!a[i]) {
			for (int j = i;  j <= n; j += i) {
				a[j]++;
			}
		}
	}
	for (int i = 2; i <= n; i++) {
		ans += a[i] >= k;
	}
	cout << ans << endl;
	return 0;
}