import java.io.IOException;
import java.util.Scanner;

public class Main {
	public static void main(String[] args) throws IOException {
		Scanner sc = new Scanner(System.in);
		int n = sc.nextInt();
		int ans = 0;

		for (int i = 1; i <= n; i += 2) {
			int cnt = 0;
			for (int j = 1; j <= i; j++) {
				if (i % j == 0)
					cnt++;
			}
			if (cnt == 8) {
				ans++;
			}
		}

		System.out.println(ans);

		sc.close();
	}
} import java.io.IOException; IOException java.io import java.util.Scanner; Scanner java.util public class Main {
	public static void main(String[] args) throws IOException {
		Scanner sc = new Scanner(System.in);
		int n = sc.nextInt();
		int ans = 0;

		for (int i = 1; i <= n; i += 2) {
			int cnt = 0;
			for (int j = 1; j <= i; j++) {
				if (i % j == 0)
					cnt++;
			}
			if (cnt == 8) {
				ans++;
			}
		}

		System.out.println(ans);

		sc.close();
	}
} Main public static void main(String[] args) throws IOException {
		Scanner sc = new Scanner(System.in);
		int n = sc.nextInt();
		int ans = 0;

		for (int i = 1; i <= n; i += 2) {
			int cnt = 0;
			for (int j = 1; j <= i; j++) {
				if (i % j == 0)
					cnt++;
			}
			if (cnt == 8) {
				ans++;
			}
		}

		System.out.println(ans);

		sc.close();
	} main {
		Scanner sc = new Scanner(System.in);
		int n = sc.nextInt();
		int ans = 0;

		for (int i = 1; i <= n; i += 2) {
			int cnt = 0;
			for (int j = 1; j <= i; j++) {
				if (i % j == 0)
					cnt++;
			}
			if (cnt == 8) {
				ans++;
			}
		}

		System.out.println(ans);

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

		for (int i = 1; i <= n; i += 2) {
			int cnt = 0;
			for (int j = 1; j <= i; j++) {
				if (i % j == 0)
					cnt++;
			}
			if (cnt == 8) {
				ans++;
			}
		}

		System.out.println(ans);

		sc.close();
	}
} public class Main {
	public static void main(String[] args) throws IOException {
		Scanner sc = new Scanner(System.in);
		int n = sc.nextInt();
		int ans = 0;

		for (int i = 1; i <= n; i += 2) {
			int cnt = 0;
			for (int j = 1; j <= i; j++) {
				if (i % j == 0)
					cnt++;
			}
			if (cnt == 8) {
				ans++;
			}
		}

		System.out.println(ans);

		sc.close();
	}
} Main
import java.io.IOException;
import java.util.Scanner;

public class Main {
	public static void main(String[] args) throws IOException {
		Scanner sc = new Scanner(System.in);
		int n = sc.nextInt();
		int ans = 0;

		for (int i = 1; i <= n; i += 2) {
			int cnt = 0;
			for (int j = 1; j <= i; j++) {
				if (i % j == 0)
					cnt++;
			}
			if (cnt == 8) {
				ans++;
			}
		}

		System.out.println(ans);

		sc.close();
	}
}
