#include <bits/stdc++.h>

using namespace std;

#define rep(i, n) for(int i = 0; i < (int)n; ++i)
#define FOR(i, a, b) for(int i = a; i < (int)b; ++i)
#define rrep(i, n) for(int i = ((int)n - 1); i >= 0; --i)

typedef long long ll;
typedef long double ld;

const int Inf = 1e9;
const double EPS = 1e-9;
const int MOD = 1e9 + 7;

vector<int> prime;

bool isPrime(int x) {
    for (int i = 2; i * i <= x; ++i) {
        if (x % i == 0) return false;
    }

    return true;
}

int calc(int x) {
    int res = 0;
    rep (i, prime.size()) {
        if (x % prime[i] == 0) res++;
    }

    return res;
}

int main() {
    cin.tie(nullptr);
    ios::sync_with_stdio(0);
    int n, k, res = 0;
    cin >> n >> k;
    FOR (i, 2, n + 1) {
        if (isPrime(i)) prime.push_back(i);
    }
    FOR (i, 2, n + 1) {
        if (calc(i) >= k) res++;
    }
    cout << res << endl;
    
    return 0;
}