import java.util.Scanner;

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

