import java.util.Scanner;

public class Main {
    public static void main(String args[]) {
        Scanner scanner = new Scanner(System.in);
        int N = scanner.nextInt();
        scanner.close();

        int ans = 0;
        for(int i = 1; i <= N; i += 2) {
            int tmp = 0;
            for(int j = 1; j <= i; j++) {
                if(i % j == 0) {
                    tmp++;
                }
            }
            if(tmp == 8) ans++;
        }
        System.out.println(ans);
    }
} import java.util.Scanner; Scanner java.util public class Main {
    public static void main(String args[]) {
        Scanner scanner = new Scanner(System.in);
        int N = scanner.nextInt();
        scanner.close();

        int ans = 0;
        for(int i = 1; i <= N; i += 2) {
            int tmp = 0;
            for(int j = 1; j <= i; j++) {
                if(i % j == 0) {
                    tmp++;
                }
            }
            if(tmp == 8) ans++;
        }
        System.out.println(ans);
    }
} Main public static void main(String args[]) {
        Scanner scanner = new Scanner(System.in);
        int N = scanner.nextInt();
        scanner.close();

        int ans = 0;
        for(int i = 1; i <= N; i += 2) {
            int tmp = 0;
            for(int j = 1; j <= i; j++) {
                if(i % j == 0) {
                    tmp++;
                }
            }
            if(tmp == 8) ans++;
        }
        System.out.println(ans);
    } main {
        Scanner scanner = new Scanner(System.in);
        int N = scanner.nextInt();
        scanner.close();

        int ans = 0;
        for(int i = 1; i <= N; i += 2) {
            int tmp = 0;
            for(int j = 1; j <= i; j++) {
                if(i % j == 0) {
                    tmp++;
                }
            }
            if(tmp == 8) ans++;
        }
        System.out.println(ans);
    } Scanner scanner = new Scanner(System.in); scanner new Scanner(System.in) int N = scanner.nextInt(); N scanner.nextInt() scanner.nextInt scanner scanner.close() scanner.close scanner int ans = 0; ans 0 for(int i = 1; i <= N; i += 2) {
            int tmp = 0;
            for(int j = 1; j <= i; j++) {
                if(i % j == 0) {
                    tmp++;
                }
            }
            if(tmp == 8) ans++;
        } int i = 1; int i = 1; i 1 i <= N i N i += 2 i += 2 i 2 {
            int tmp = 0;
            for(int j = 1; j <= i; j++) {
                if(i % j == 0) {
                    tmp++;
                }
            }
            if(tmp == 8) ans++;
        } {
            int tmp = 0;
            for(int j = 1; j <= i; j++) {
                if(i % j == 0) {
                    tmp++;
                }
            }
            if(tmp == 8) ans++;
        } int tmp = 0; tmp 0 for(int j = 1; j <= i; j++) {
                if(i % j == 0) {
                    tmp++;
                }
            } int j = 1; int j = 1; j 1 j <= i j i j++ j++ j {
                if(i % j == 0) {
                    tmp++;
                }
            } {
                if(i % j == 0) {
                    tmp++;
                }
            } if(i % j == 0) {
                    tmp++;
                } i % j == 0 i % j i j 0 {
                    tmp++;
                } tmp++ tmp if(tmp == 8) ans++; tmp == 8 tmp 8 ans++ ans System.out.println(ans) System.out.println System.out System System.out ans String args[] args public class Main {
    public static void main(String args[]) {
        Scanner scanner = new Scanner(System.in);
        int N = scanner.nextInt();
        scanner.close();

        int ans = 0;
        for(int i = 1; i <= N; i += 2) {
            int tmp = 0;
            for(int j = 1; j <= i; j++) {
                if(i % j == 0) {
                    tmp++;
                }
            }
            if(tmp == 8) ans++;
        }
        System.out.println(ans);
    }
} public class Main {
    public static void main(String args[]) {
        Scanner scanner = new Scanner(System.in);
        int N = scanner.nextInt();
        scanner.close();

        int ans = 0;
        for(int i = 1; i <= N; i += 2) {
            int tmp = 0;
            for(int j = 1; j <= i; j++) {
                if(i % j == 0) {
                    tmp++;
                }
            }
            if(tmp == 8) ans++;
        }
        System.out.println(ans);
    }
} Main
import java.util.Scanner;

public class Main {
    public static void main(String args[]) {
        Scanner scanner = new Scanner(System.in);
        int N = scanner.nextInt();
        scanner.close();

        int ans = 0;
        for(int i = 1; i <= N; i += 2) {
            int tmp = 0;
            for(int j = 1; j <= i; j++) {
                if(i % j == 0) {
                    tmp++;
                }
            }
            if(tmp == 8) ans++;
        }
        System.out.println(ans);
    }
}