import java.util.Scanner;

public class Main {
	public static void main(String[] args) {
		int N;
	    Scanner in = new Scanner(System.in);
	    N = Integer.parseInt(in.next());
	    int cnt;
	    int ans = 0;
	    for (int i = 1; i <= N; i+=2) {
	    	cnt = 0;
			for (int j = 1; j*j <= i; j++) {
				if(i%j==0) {
					if(j*j == i) {
						cnt++;
					}else {
						cnt+=2;
					}
				}
			}
			if(cnt == 8) {
				ans++;
			}
		}
	    System.out.println(ans);
	}
} import java.util.Scanner; Scanner java.util public class Main {
	public static void main(String[] args) {
		int N;
	    Scanner in = new Scanner(System.in);
	    N = Integer.parseInt(in.next());
	    int cnt;
	    int ans = 0;
	    for (int i = 1; i <= N; i+=2) {
	    	cnt = 0;
			for (int j = 1; j*j <= i; j++) {
				if(i%j==0) {
					if(j*j == i) {
						cnt++;
					}else {
						cnt+=2;
					}
				}
			}
			if(cnt == 8) {
				ans++;
			}
		}
	    System.out.println(ans);
	}
} Main public static void main(String[] args) {
		int N;
	    Scanner in = new Scanner(System.in);
	    N = Integer.parseInt(in.next());
	    int cnt;
	    int ans = 0;
	    for (int i = 1; i <= N; i+=2) {
	    	cnt = 0;
			for (int j = 1; j*j <= i; j++) {
				if(i%j==0) {
					if(j*j == i) {
						cnt++;
					}else {
						cnt+=2;
					}
				}
			}
			if(cnt == 8) {
				ans++;
			}
		}
	    System.out.println(ans);
	} main {
		int N;
	    Scanner in = new Scanner(System.in);
	    N = Integer.parseInt(in.next());
	    int cnt;
	    int ans = 0;
	    for (int i = 1; i <= N; i+=2) {
	    	cnt = 0;
			for (int j = 1; j*j <= i; j++) {
				if(i%j==0) {
					if(j*j == i) {
						cnt++;
					}else {
						cnt+=2;
					}
				}
			}
			if(cnt == 8) {
				ans++;
			}
		}
	    System.out.println(ans);
	} int N; N Scanner in = new Scanner(System.in); in new Scanner(System.in) N = Integer.parseInt(in.next()) N Integer.parseInt(in.next()) Integer.parseInt Integer in.next() in.next in int cnt; cnt int ans = 0; ans 0 for (int i = 1; i <= N; i+=2) {
	    	cnt = 0;
			for (int j = 1; j*j <= i; j++) {
				if(i%j==0) {
					if(j*j == i) {
						cnt++;
					}else {
						cnt+=2;
					}
				}
			}
			if(cnt == 8) {
				ans++;
			}
		} int i = 1; int i = 1; i 1 i <= N i N i+=2 i+=2 i 2 {
	    	cnt = 0;
			for (int j = 1; j*j <= i; j++) {
				if(i%j==0) {
					if(j*j == i) {
						cnt++;
					}else {
						cnt+=2;
					}
				}
			}
			if(cnt == 8) {
				ans++;
			}
		} {
	    	cnt = 0;
			for (int j = 1; j*j <= i; j++) {
				if(i%j==0) {
					if(j*j == i) {
						cnt++;
					}else {
						cnt+=2;
					}
				}
			}
			if(cnt == 8) {
				ans++;
			}
		} cnt = 0 cnt 0 for (int j = 1; j*j <= i; j++) {
				if(i%j==0) {
					if(j*j == i) {
						cnt++;
					}else {
						cnt+=2;
					}
				}
			} int j = 1; int j = 1; j 1 j*j <= i j*j j j i j++ j++ j {
				if(i%j==0) {
					if(j*j == i) {
						cnt++;
					}else {
						cnt+=2;
					}
				}
			} {
				if(i%j==0) {
					if(j*j == i) {
						cnt++;
					}else {
						cnt+=2;
					}
				}
			} if(i%j==0) {
					if(j*j == i) {
						cnt++;
					}else {
						cnt+=2;
					}
				} i%j==0 i%j i j 0 {
					if(j*j == i) {
						cnt++;
					}else {
						cnt+=2;
					}
				} if(j*j == i) {
						cnt++;
					}else {
						cnt+=2;
					} j*j == i j*j j j i {
						cnt++;
					} cnt++ cnt {
						cnt+=2;
					} cnt+=2 cnt 2 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) {
		int N;
	    Scanner in = new Scanner(System.in);
	    N = Integer.parseInt(in.next());
	    int cnt;
	    int ans = 0;
	    for (int i = 1; i <= N; i+=2) {
	    	cnt = 0;
			for (int j = 1; j*j <= i; j++) {
				if(i%j==0) {
					if(j*j == i) {
						cnt++;
					}else {
						cnt+=2;
					}
				}
			}
			if(cnt == 8) {
				ans++;
			}
		}
	    System.out.println(ans);
	}
} public class Main {
	public static void main(String[] args) {
		int N;
	    Scanner in = new Scanner(System.in);
	    N = Integer.parseInt(in.next());
	    int cnt;
	    int ans = 0;
	    for (int i = 1; i <= N; i+=2) {
	    	cnt = 0;
			for (int j = 1; j*j <= i; j++) {
				if(i%j==0) {
					if(j*j == i) {
						cnt++;
					}else {
						cnt+=2;
					}
				}
			}
			if(cnt == 8) {
				ans++;
			}
		}
	    System.out.println(ans);
	}
} Main
import java.util.Scanner;

public class Main {
	public static void main(String[] args) {
		int N;
	    Scanner in = new Scanner(System.in);
	    N = Integer.parseInt(in.next());
	    int cnt;
	    int ans = 0;
	    for (int i = 1; i <= N; i+=2) {
	    	cnt = 0;
			for (int j = 1; j*j <= i; j++) {
				if(i%j==0) {
					if(j*j == i) {
						cnt++;
					}else {
						cnt+=2;
					}
				}
			}
			if(cnt == 8) {
				ans++;
			}
		}
	    System.out.println(ans);
	}
}