#include<iostream>
#include<cmath>
using namespace std;

int count(int n){
    int cnt = 0;
    for(int i = 2; i <= n; i++){
        if(n%i == 0){
            cnt+=1;
            n/=i;
            while(n%i == 0) n/=i;
        }
    }
    return cnt;
}

int main(){
    int n, k;
    cin >> n >> k;
    int ans = n-1;

    for(int i = 2; i <= n; i++){
        if(count(i) < k)    ans--;
    }

    cout << ans << endl;
    return 0;
}