import java.util.*;
public class Main {

	public static void main(String[] args) {
		// TODO Auto-generated method stub
		Scanner sc =new Scanner(System.in);
		
		int n = sc.nextInt();
		int count = 0;
		int ans = -1+1;
		
		for(int i =1; i<=n; i++) {
			for(int j = 1; j<=i; j++) {
				if(i%j ==0) {
					count +=1;
				}
			}
			if(count==8) {
				ans +=1;
			}
			count = 0;
			i++;
		}
		System.out.println(ans);
	}

} import java.util.*; util.* java public class Main {

	public static void main(String[] args) {
		// TODO Auto-generated method stub
		Scanner sc =new Scanner(System.in);
		
		int n = sc.nextInt();
		int count = 0;
		int ans = -1+1;
		
		for(int i =1; i<=n; i++) {
			for(int j = 1; j<=i; j++) {
				if(i%j ==0) {
					count +=1;
				}
			}
			if(count==8) {
				ans +=1;
			}
			count = 0;
			i++;
		}
		System.out.println(ans);
	}

} Main public static void main(String[] args) {
		// TODO Auto-generated method stub
		Scanner sc =new Scanner(System.in);
		
		int n = sc.nextInt();
		int count = 0;
		int ans = -1+1;
		
		for(int i =1; i<=n; i++) {
			for(int j = 1; j<=i; j++) {
				if(i%j ==0) {
					count +=1;
				}
			}
			if(count==8) {
				ans +=1;
			}
			count = 0;
			i++;
		}
		System.out.println(ans);
	} main {
		// TODO Auto-generated method stub
		Scanner sc =new Scanner(System.in);
		
		int n = sc.nextInt();
		int count = 0;
		int ans = -1+1;
		
		for(int i =1; i<=n; i++) {
			for(int j = 1; j<=i; j++) {
				if(i%j ==0) {
					count +=1;
				}
			}
			if(count==8) {
				ans +=1;
			}
			count = 0;
			i++;
		}
		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 count = 0; count 0 int ans = -1+1; ans -1+1 -1 1 1 for(int i =1; i<=n; i++) {
			for(int j = 1; j<=i; j++) {
				if(i%j ==0) {
					count +=1;
				}
			}
			if(count==8) {
				ans +=1;
			}
			count = 0;
			i++;
		} int i =1; int i =1; i 1 i<=n i n i++ i++ i {
			for(int j = 1; j<=i; j++) {
				if(i%j ==0) {
					count +=1;
				}
			}
			if(count==8) {
				ans +=1;
			}
			count = 0;
			i++;
		} {
			for(int j = 1; j<=i; j++) {
				if(i%j ==0) {
					count +=1;
				}
			}
			if(count==8) {
				ans +=1;
			}
			count = 0;
			i++;
		} for(int j = 1; j<=i; j++) {
				if(i%j ==0) {
					count +=1;
				}
			} int j = 1; int j = 1; j 1 j<=i j i j++ j++ j {
				if(i%j ==0) {
					count +=1;
				}
			} {
				if(i%j ==0) {
					count +=1;
				}
			} if(i%j ==0) {
					count +=1;
				} i%j ==0 i%j i j 0 {
					count +=1;
				} count +=1 count 1 if(count==8) {
				ans +=1;
			} count==8 count 8 {
				ans +=1;
			} ans +=1 ans 1 count = 0 count 0 i++ i 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) {
		// TODO Auto-generated method stub
		Scanner sc =new Scanner(System.in);
		
		int n = sc.nextInt();
		int count = 0;
		int ans = -1+1;
		
		for(int i =1; i<=n; i++) {
			for(int j = 1; j<=i; j++) {
				if(i%j ==0) {
					count +=1;
				}
			}
			if(count==8) {
				ans +=1;
			}
			count = 0;
			i++;
		}
		System.out.println(ans);
	}

} public class Main {

	public static void main(String[] args) {
		// TODO Auto-generated method stub
		Scanner sc =new Scanner(System.in);
		
		int n = sc.nextInt();
		int count = 0;
		int ans = -1+1;
		
		for(int i =1; i<=n; i++) {
			for(int j = 1; j<=i; j++) {
				if(i%j ==0) {
					count +=1;
				}
			}
			if(count==8) {
				ans +=1;
			}
			count = 0;
			i++;
		}
		System.out.println(ans);
	}

} Main
import java.util.*;
public class Main {

	public static void main(String[] args) {
		// TODO Auto-generated method stub
		Scanner sc =new Scanner(System.in);
		
		int n = sc.nextInt();
		int count = 0;
		int ans = -1+1;
		
		for(int i =1; i<=n; i++) {
			for(int j = 1; j<=i; j++) {
				if(i%j ==0) {
					count +=1;
				}
			}
			if(count==8) {
				ans +=1;
			}
			count = 0;
			i++;
		}
		System.out.println(ans);
	}

}
