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 cnt=0;
			for(int j=1;j<=i;j++) {
				if(i%j==0) {
					cnt++;
				}
			}
			if(cnt==8) {
				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();
		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);
	}
} 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 cnt=0;
			for(int j=1;j<=i;j++) {
				if(i%j==0) {
					cnt++;
				}
			}
			if(cnt==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;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);
	} 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++ 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 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 cnt=0;
			for(int j=1;j<=i;j++) {
				if(i%j==0) {
					cnt++;
				}
			}
			if(cnt==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;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);
	}
} 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 cnt=0;
			for(int j=1;j<=i;j++) {
				if(i%j==0) {
					cnt++;
				}
			}
			if(cnt==8) {
				ans++;
			}
		}
		System.out.println(ans);
	}
}