#include <bits/stdc++.h>
using namespace std;

int have[123456];

signed main(){
  int n,k;cin>>n>>k;
  for(int i=2;i<=n;i++){
    if(have[i])continue;
    for(int j=i;j<=n;j+=i)have[j]++;
  }
  int ans=0;
  for(int i=2;i<=n;i++)ans+=have[i]>=k;
  cout<<ans<<endl;
}