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

#define int long long
int fel(int i){
  return (1<<i)+1;
}
bool pri(int a){
  if(a<=1)return false;
  for(int i=2;i*i<=a;i++)if(a%i==0)return false;
  return true;
}

signed main(){
  int n;cin>>n;
  vector<int> v,w;
  for(int i=1;i<30;i++)if(pri(fel(i)))v.push_back(fel(i));
  int A=v.size();
  for(int i=0;i<(1<<A);i++){
    int res=1;
    for(int j=0;j<A;j++)if((i>>j)&1)res*=v[j];
    w.push_back(res);
  }
  int ans=0;
  for(int p:w){
    while(p<=n){
      if(p>2)ans++;
      p*=2;
    }
  }
  cout<<ans<<endl;
}