/**
 * code generated by JHelper
 * More info: https://github.com/AlexeyDmitriev/JHelper
 * @author champon
 */

#include <iostream>
#include <fstream>
#include<bits/stdc++.h>
#define se cout << "test ok" << endl;
#define sp << " " <<
#define enl "\n";
using namespace std;
using ll=long long;
using ld=long double;
ll mod = ll(1e9)+7;
ll inf = ll(1e18);
void bl(bool b, ostream& out=cout){ out << (b ? "Yes" : "No") << endl; }
void bl2(bool b, ostream& out=cout){ out << (b ? "YES" : "NO") << endl; }
template<typename T> inline bool chmax(T &a, T b){ if(a<b){a=b; return true;} return false; }
template<typename T> inline bool chmin(T &a, T b){ if(a>b){a=b; return true;} return false; }
int dx[] = {1, 0, -1, 0, 1, -1, 1, -1};
int dy[] = {0, 1, 0, -1, 1, -1, -1, 1};

#ifndef INCLUDE_DEBUG_HPP
#define INCLUDE_DEBUG_HPP

#include <iostream>
#include <vector>
#include <map>
using namespace std;

namespace dbg {
    using ll = long long;

    class Debug {
    public:
        Debug(){}
        template<typename T>
        void vd(vector<T> vec);
        template<typename T>
        void vd2(vector<vector<T>> vec);
        template<typename T>
        void ad(T *arr, ll n);
        template<typename T, size_t N>
        void ad2(T (&arr)[N], ll n);
        template<typename T>
        void md(T mp);
    };

    template<typename T>
    void Debug::vd(vector<T> vec) {
        for (auto vv : vec) cout << vv << " ";
        cout << endl;
    }

    template<typename T>
    void Debug::vd2(vector<vector<T>> vec) {
        for (auto vv : vec) {
            for (auto vvv : vv) cout << vvv << " ";
            cout << endl;
        }
    }

    template<typename T>
    void Debug::ad(T *arr, ll n) {
        for (int i = 0; i <= n; i++) cout << arr[i] << " ";
        cout << endl;
    }

    template<typename T, size_t N>
    void Debug::ad2(T (&arr)[N], ll n) {
        for (int i = 0; i <= N; i++) for (int j = 0; j <= n; j++) cout << arr[i][j] << " ";
        cout << endl;
    }

    template<typename T>
    void Debug::md(T mp) {
        cout << "key : value" << endl;
        for (auto const &m : mp) cout << m.first << " : " << m.second << endl;
        cout << endl;
    }

}

#endif //INCLUDE_DEBUG_HPP

using dbg::Debug;
Debug debug;

#ifndef INCLUDE_FACTOR_HPP
#define INCLUDE_FACTOR_HPP



using namespace std;

namespace factor {

    using ll = long long;

    class Factor {
    public:
        Factor()= default;

        // 素因数分解(Map)
        template<typename T>map<ll, ll> factorMap(T n);

        template<typename T>
        void factorMapAdd(T n, map<T, T> *mp);

        // 素因数分解(Vector)
        template<typename T> vector<ll> factorVec(T n);

        // 約数(Vector)
        template<typename T> vector<ll> divisor(T n);
    };

    template<typename T>
    map<ll, ll> Factor::factorMap(T n) {
        map<ll, ll> res;
        ll buf = n;
        for (ll i = 2; i*i<=n; i++) {
            while (buf % i == 0) {
                res[i]++;
                buf /= i;
            }
        }
        if(buf > 1) res[buf]++;
        return res;
    }

    template<typename T>
    void Factor::factorMapAdd(T n, map<T, T> *mp) {
        ll buf = n;
        for (ll i = 2; i*i<=n; i++) {
            while (buf % i == 0) {
                (*mp)[i]++;
                buf /= i;
            }
        }
        if(buf > 1) (*mp)[buf]++;
    }

    template<typename T>
    vector<ll> Factor::factorVec(T n){
        vector<ll> res;
        ll buf = n;
        for(ll i=2; i*i<=n; i++){
            while(buf%i == 0){
                res.push_back(i);
                buf /= i;
            }
        }
        if(buf > 1) res.push_back(buf);
        return res;
    }

    template<typename T>
    vector<ll> Factor::divisor(T n){
        vector<ll> res;
        for(ll i=1; i*i<=n; i++){
            if(n%i == 0){
                if(i*i == n) res.push_back(i);
                else{
                    res.push_back(i);
                    res.push_back(n/i);
                }
            }
        }
        return res;
    }
}

#endif //INCLUDE_FACTOR_HPP


// verify
// divisor(): https://atcoder.jp/contests/abc161/tasks/abc161_f
using factor::Factor;

class B105 {
public:
	void solve(std::istream& in, std::ostream& out) {
	    int n;
	    in >> n;
	    Factor f;
	    int cnt = 0;
	    for(int i=1; i<=n; i++){
	        if(!(i&1)) continue;
            vector<ll> div = f.divisor(i);
            if(div.size() == 8) cnt++;
	    }

	    out << cnt << endl;
	}
};


int main() {
    cin.tie(nullptr);
    ios_base::sync_with_stdio(false);
	B105 solver;
	std::istream& in(std::cin);
	std::ostream& out(std::cout);
	solver.solve(in, out);
	return 0;
}


Measured memory_bytes: 256