import java.util.Scanner;

public class Main {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int N = sc.nextInt();
		sc.close();
		
		int ans = 0;
		
		for(int i = 1;i <= N;i+=2) {
			int count = 0;
				for(int j = 1;j <= i/2;++j)
					if(i % j == 0)
						count++;
			if(count == 7)
				ans++;
		}
		
		System.out.println(ans);
	}

} import java.util.Scanner; Scanner java.util public class Main {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int N = sc.nextInt();
		sc.close();
		
		int ans = 0;
		
		for(int i = 1;i <= N;i+=2) {
			int count = 0;
				for(int j = 1;j <= i/2;++j)
					if(i % j == 0)
						count++;
			if(count == 7)
				ans++;
		}
		
		System.out.println(ans);
	}

} Main public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int N = sc.nextInt();
		sc.close();
		
		int ans = 0;
		
		for(int i = 1;i <= N;i+=2) {
			int count = 0;
				for(int j = 1;j <= i/2;++j)
					if(i % j == 0)
						count++;
			if(count == 7)
				ans++;
		}
		
		System.out.println(ans);
	} main {
		Scanner sc = new Scanner(System.in);
		int N = sc.nextInt();
		sc.close();
		
		int ans = 0;
		
		for(int i = 1;i <= N;i+=2) {
			int count = 0;
				for(int j = 1;j <= i/2;++j)
					if(i % j == 0)
						count++;
			if(count == 7)
				ans++;
		}
		
		System.out.println(ans);
	} Scanner sc = new Scanner(System.in); sc new Scanner(System.in) int N = sc.nextInt(); N sc.nextInt() sc.nextInt sc sc.close() sc.close sc int ans = 0; ans 0 for(int i = 1;i <= N;i+=2) {
			int count = 0;
				for(int j = 1;j <= i/2;++j)
					if(i % j == 0)
						count++;
			if(count == 7)
				ans++;
		} int i = 1; int i = 1; i 1 i <= N i N i+=2 i+=2 i 2 {
			int count = 0;
				for(int j = 1;j <= i/2;++j)
					if(i % j == 0)
						count++;
			if(count == 7)
				ans++;
		} {
			int count = 0;
				for(int j = 1;j <= i/2;++j)
					if(i % j == 0)
						count++;
			if(count == 7)
				ans++;
		} int count = 0; count 0 for(int j = 1;j <= i/2;++j)
					if(i % j == 0)
						count++; int j = 1; int j = 1; j 1 j <= i/2 j i/2 i 2 ++j ++j j if(i % j == 0)
						count++; if(i % j == 0)
						count++; i % j == 0 i % j i j 0 count++ count if(count == 7)
				ans++; count == 7 count 7 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 sc = new Scanner(System.in);
		int N = sc.nextInt();
		sc.close();
		
		int ans = 0;
		
		for(int i = 1;i <= N;i+=2) {
			int count = 0;
				for(int j = 1;j <= i/2;++j)
					if(i % j == 0)
						count++;
			if(count == 7)
				ans++;
		}
		
		System.out.println(ans);
	}

} public class Main {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int N = sc.nextInt();
		sc.close();
		
		int ans = 0;
		
		for(int i = 1;i <= N;i+=2) {
			int count = 0;
				for(int j = 1;j <= i/2;++j)
					if(i % j == 0)
						count++;
			if(count == 7)
				ans++;
		}
		
		System.out.println(ans);
	}

} Main
import java.util.Scanner;

public class Main {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int N = sc.nextInt();
		sc.close();
		
		int ans = 0;
		
		for(int i = 1;i <= N;i+=2) {
			int count = 0;
				for(int j = 1;j <= i/2;++j)
					if(i % j == 0)
						count++;
			if(count == 7)
				ans++;
		}
		
		System.out.println(ans);
	}

}