import 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+1;i += 2){
			int count = 0;
			for(int j = 1;j < i+1;j ++){
				if(i % j == 0){
					count++;
				}
			}
			if(count == 8){
				ans++;
			}
		}
		System.out.println(ans);
	}
} import java.util.*; util.* java 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+1;i += 2){
			int count = 0;
			for(int j = 1;j < i+1;j ++){
				if(i % j == 0){
					count++;
				}
			}
			if(count == 8){
				ans++;
			}
		}
		System.out.println(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+1;i += 2){
			int count = 0;
			for(int j = 1;j < i+1;j ++){
				if(i % j == 0){
					count++;
				}
			}
			if(count == 8){
				ans++;
			}
		}
		System.out.println(ans);
	} main {
		Scanner sc = new Scanner(System.in);
		int N = sc.nextInt();
		int ans = 0;
		for(int i = 1;i < N+1;i += 2){
			int count = 0;
			for(int j = 1;j < i+1;j ++){
				if(i % j == 0){
					count++;
				}
			}
			if(count == 8){
				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 int ans = 0; ans 0 for(int i = 1;i < N+1;i += 2){
			int count = 0;
			for(int j = 1;j < i+1;j ++){
				if(i % j == 0){
					count++;
				}
			}
			if(count == 8){
				ans++;
			}
		} int i = 1; int i = 1; i 1 i < N+1 i N+1 N 1 i += 2 i += 2 i 2 {
			int count = 0;
			for(int j = 1;j < i+1;j ++){
				if(i % j == 0){
					count++;
				}
			}
			if(count == 8){
				ans++;
			}
		} {
			int count = 0;
			for(int j = 1;j < i+1;j ++){
				if(i % j == 0){
					count++;
				}
			}
			if(count == 8){
				ans++;
			}
		} int count = 0; count 0 for(int j = 1;j < i+1;j ++){
				if(i % j == 0){
					count++;
				}
			} int j = 1; int j = 1; j 1 j < i+1 j i+1 i 1 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.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();
		int ans = 0;
		for(int i = 1;i < N+1;i += 2){
			int count = 0;
			for(int j = 1;j < i+1;j ++){
				if(i % j == 0){
					count++;
				}
			}
			if(count == 8){
				ans++;
			}
		}
		System.out.println(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+1;i += 2){
			int count = 0;
			for(int j = 1;j < i+1;j ++){
				if(i % j == 0){
					count++;
				}
			}
			if(count == 8){
				ans++;
			}
		}
		System.out.println(ans);
	}
} Main
import 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+1;i += 2){
			int count = 0;
			for(int j = 1;j < i+1;j ++){
				if(i % j == 0){
					count++;
				}
			}
			if(count == 8){
				ans++;
			}
		}
		System.out.println(ans);
	}
}