
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.util.StringTokenizer;

public class Main {
	public static void main(String[] args) {
		FastReader sc = new FastReader();
		PrintWriter out = new PrintWriter(System.out);
		int N = sc.nextInt();

		int re = 0;
		for (int i = 1; i <= N; i += 2) {
			int count = 0;
			for (int k=1;k<=i;k++) {
				if(i%k==0) {
					count++;
				}
			}
			if(count == 8) {
				re++;
			}
		}
out.println(re);
		out.flush();

	}

	static class FastReader {
		BufferedReader br;
		StringTokenizer st;

		public FastReader() {
			br = new BufferedReader(new InputStreamReader(System.in));
		}

		String next() {
			while (st == null || !st.hasMoreElements()) {
				try {
					st = new StringTokenizer(br.readLine());
				} catch (IOException e) {
					e.printStackTrace();
				}
			}
			return st.nextToken();
		}

		int nextInt() {
			return Integer.parseInt(next());
		}

		long nextLong() {
			return Long.parseLong(next());
		}

		double nextDouble() {
			return Double.parseDouble(next());
		}

		String nextLine() {
			String str = "";
			try {
				str = br.readLine();
			} catch (IOException e) {
				e.printStackTrace();
			}
			return str;
		}
	}
} import java.io.BufferedReader; BufferedReader java.io import java.io.IOException; IOException java.io import java.io.InputStreamReader; InputStreamReader java.io import java.io.PrintWriter; PrintWriter java.io import java.util.StringTokenizer; StringTokenizer java.util public class Main {
	public static void main(String[] args) {
		FastReader sc = new FastReader();
		PrintWriter out = new PrintWriter(System.out);
		int N = sc.nextInt();

		int re = 0;
		for (int i = 1; i <= N; i += 2) {
			int count = 0;
			for (int k=1;k<=i;k++) {
				if(i%k==0) {
					count++;
				}
			}
			if(count == 8) {
				re++;
			}
		}
out.println(re);
		out.flush();

	}

	static class FastReader {
		BufferedReader br;
		StringTokenizer st;

		public FastReader() {
			br = new BufferedReader(new InputStreamReader(System.in));
		}

		String next() {
			while (st == null || !st.hasMoreElements()) {
				try {
					st = new StringTokenizer(br.readLine());
				} catch (IOException e) {
					e.printStackTrace();
				}
			}
			return st.nextToken();
		}

		int nextInt() {
			return Integer.parseInt(next());
		}

		long nextLong() {
			return Long.parseLong(next());
		}

		double nextDouble() {
			return Double.parseDouble(next());
		}

		String nextLine() {
			String str = "";
			try {
				str = br.readLine();
			} catch (IOException e) {
				e.printStackTrace();
			}
			return str;
		}
	}
} Main public static void main(String[] args) {
		FastReader sc = new FastReader();
		PrintWriter out = new PrintWriter(System.out);
		int N = sc.nextInt();

		int re = 0;
		for (int i = 1; i <= N; i += 2) {
			int count = 0;
			for (int k=1;k<=i;k++) {
				if(i%k==0) {
					count++;
				}
			}
			if(count == 8) {
				re++;
			}
		}
out.println(re);
		out.flush();

	} main {
		FastReader sc = new FastReader();
		PrintWriter out = new PrintWriter(System.out);
		int N = sc.nextInt();

		int re = 0;
		for (int i = 1; i <= N; i += 2) {
			int count = 0;
			for (int k=1;k<=i;k++) {
				if(i%k==0) {
					count++;
				}
			}
			if(count == 8) {
				re++;
			}
		}
out.println(re);
		out.flush();

	} FastReader sc = new FastReader(); sc new FastReader() PrintWriter out = new PrintWriter(System.out); out new PrintWriter(System.out) int N = sc.nextInt(); N sc.nextInt() sc.nextInt sc int re = 0; re 0 for (int i = 1; i <= N; i += 2) {
			int count = 0;
			for (int k=1;k<=i;k++) {
				if(i%k==0) {
					count++;
				}
			}
			if(count == 8) {
				re++;
			}
		} int i = 1; int i = 1; i 1 i <= N i N i += 2 i += 2 i 2 {
			int count = 0;
			for (int k=1;k<=i;k++) {
				if(i%k==0) {
					count++;
				}
			}
			if(count == 8) {
				re++;
			}
		} {
			int count = 0;
			for (int k=1;k<=i;k++) {
				if(i%k==0) {
					count++;
				}
			}
			if(count == 8) {
				re++;
			}
		} int count = 0; count 0 for (int k=1;k<=i;k++) {
				if(i%k==0) {
					count++;
				}
			} int k=1; int k=1; k 1 k<=i k i k++ k++ k {
				if(i%k==0) {
					count++;
				}
			} {
				if(i%k==0) {
					count++;
				}
			} if(i%k==0) {
					count++;
				} i%k==0 i%k i k 0 {
					count++;
				} count++ count if(count == 8) {
				re++;
			} count == 8 count 8 {
				re++;
			} re++ re out.println(re) out.println out re out.flush() out.flush out String[] args args static class FastReader {
		BufferedReader br;
		StringTokenizer st;

		public FastReader() {
			br = new BufferedReader(new InputStreamReader(System.in));
		}

		String next() {
			while (st == null || !st.hasMoreElements()) {
				try {
					st = new StringTokenizer(br.readLine());
				} catch (IOException e) {
					e.printStackTrace();
				}
			}
			return st.nextToken();
		}

		int nextInt() {
			return Integer.parseInt(next());
		}

		long nextLong() {
			return Long.parseLong(next());
		}

		double nextDouble() {
			return Double.parseDouble(next());
		}

		String nextLine() {
			String str = "";
			try {
				str = br.readLine();
			} catch (IOException e) {
				e.printStackTrace();
			}
			return str;
		}
	} FastReader BufferedReader br; br StringTokenizer st; st public FastReader() {
			br = new BufferedReader(new InputStreamReader(System.in));
		} FastReader {
			br = new BufferedReader(new InputStreamReader(System.in));
		} br = new BufferedReader(new InputStreamReader(System.in)) br new BufferedReader(new InputStreamReader(System.in)) String next() {
			while (st == null || !st.hasMoreElements()) {
				try {
					st = new StringTokenizer(br.readLine());
				} catch (IOException e) {
					e.printStackTrace();
				}
			}
			return st.nextToken();
		} next {
			while (st == null || !st.hasMoreElements()) {
				try {
					st = new StringTokenizer(br.readLine());
				} catch (IOException e) {
					e.printStackTrace();
				}
			}
			return st.nextToken();
		} while (st == null || !st.hasMoreElements()) {
				try {
					st = new StringTokenizer(br.readLine());
				} catch (IOException e) {
					e.printStackTrace();
				}
			} st == null || !st.hasMoreElements() st == null st null !st.hasMoreElements() st.hasMoreElements() st.hasMoreElements st {
				try {
					st = new StringTokenizer(br.readLine());
				} catch (IOException e) {
					e.printStackTrace();
				}
			} try {
					st = new StringTokenizer(br.readLine());
				} catch (IOException e) {
					e.printStackTrace();
				} catch (IOException e) {
					e.printStackTrace();
				} IOException e {
					e.printStackTrace();
				} e.printStackTrace() e.printStackTrace e {
					st = new StringTokenizer(br.readLine());
				} st = new StringTokenizer(br.readLine()) st new StringTokenizer(br.readLine()) return st.nextToken(); st.nextToken() st.nextToken st int nextInt() {
			return Integer.parseInt(next());
		} nextInt {
			return Integer.parseInt(next());
		} return Integer.parseInt(next()); Integer.parseInt(next()) Integer.parseInt Integer next() next long nextLong() {
			return Long.parseLong(next());
		} nextLong {
			return Long.parseLong(next());
		} return Long.parseLong(next()); Long.parseLong(next()) Long.parseLong Long next() next double nextDouble() {
			return Double.parseDouble(next());
		} nextDouble {
			return Double.parseDouble(next());
		} return Double.parseDouble(next()); Double.parseDouble(next()) Double.parseDouble Double next() next String nextLine() {
			String str = "";
			try {
				str = br.readLine();
			} catch (IOException e) {
				e.printStackTrace();
			}
			return str;
		} nextLine {
			String str = "";
			try {
				str = br.readLine();
			} catch (IOException e) {
				e.printStackTrace();
			}
			return str;
		} String str = ""; str "" try {
				str = br.readLine();
			} catch (IOException e) {
				e.printStackTrace();
			} catch (IOException e) {
				e.printStackTrace();
			} IOException e {
				e.printStackTrace();
			} e.printStackTrace() e.printStackTrace e {
				str = br.readLine();
			} str = br.readLine() str br.readLine() br.readLine br return str; str public class Main {
	public static void main(String[] args) {
		FastReader sc = new FastReader();
		PrintWriter out = new PrintWriter(System.out);
		int N = sc.nextInt();

		int re = 0;
		for (int i = 1; i <= N; i += 2) {
			int count = 0;
			for (int k=1;k<=i;k++) {
				if(i%k==0) {
					count++;
				}
			}
			if(count == 8) {
				re++;
			}
		}
out.println(re);
		out.flush();

	}

	static class FastReader {
		BufferedReader br;
		StringTokenizer st;

		public FastReader() {
			br = new BufferedReader(new InputStreamReader(System.in));
		}

		String next() {
			while (st == null || !st.hasMoreElements()) {
				try {
					st = new StringTokenizer(br.readLine());
				} catch (IOException e) {
					e.printStackTrace();
				}
			}
			return st.nextToken();
		}

		int nextInt() {
			return Integer.parseInt(next());
		}

		long nextLong() {
			return Long.parseLong(next());
		}

		double nextDouble() {
			return Double.parseDouble(next());
		}

		String nextLine() {
			String str = "";
			try {
				str = br.readLine();
			} catch (IOException e) {
				e.printStackTrace();
			}
			return str;
		}
	}
} public class Main {
	public static void main(String[] args) {
		FastReader sc = new FastReader();
		PrintWriter out = new PrintWriter(System.out);
		int N = sc.nextInt();

		int re = 0;
		for (int i = 1; i <= N; i += 2) {
			int count = 0;
			for (int k=1;k<=i;k++) {
				if(i%k==0) {
					count++;
				}
			}
			if(count == 8) {
				re++;
			}
		}
out.println(re);
		out.flush();

	}

	static class FastReader {
		BufferedReader br;
		StringTokenizer st;

		public FastReader() {
			br = new BufferedReader(new InputStreamReader(System.in));
		}

		String next() {
			while (st == null || !st.hasMoreElements()) {
				try {
					st = new StringTokenizer(br.readLine());
				} catch (IOException e) {
					e.printStackTrace();
				}
			}
			return st.nextToken();
		}

		int nextInt() {
			return Integer.parseInt(next());
		}

		long nextLong() {
			return Long.parseLong(next());
		}

		double nextDouble() {
			return Double.parseDouble(next());
		}

		String nextLine() {
			String str = "";
			try {
				str = br.readLine();
			} catch (IOException e) {
				e.printStackTrace();
			}
			return str;
		}
	}
} Main

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.util.StringTokenizer;

public class Main {
	public static void main(String[] args) {
		FastReader sc = new FastReader();
		PrintWriter out = new PrintWriter(System.out);
		int N = sc.nextInt();

		int re = 0;
		for (int i = 1; i <= N; i += 2) {
			int count = 0;
			for (int k=1;k<=i;k++) {
				if(i%k==0) {
					count++;
				}
			}
			if(count == 8) {
				re++;
			}
		}
out.println(re);
		out.flush();

	}

	static class FastReader {
		BufferedReader br;
		StringTokenizer st;

		public FastReader() {
			br = new BufferedReader(new InputStreamReader(System.in));
		}

		String next() {
			while (st == null || !st.hasMoreElements()) {
				try {
					st = new StringTokenizer(br.readLine());
				} catch (IOException e) {
					e.printStackTrace();
				}
			}
			return st.nextToken();
		}

		int nextInt() {
			return Integer.parseInt(next());
		}

		long nextLong() {
			return Long.parseLong(next());
		}

		double nextDouble() {
			return Double.parseDouble(next());
		}

		String nextLine() {
			String str = "";
			try {
				str = br.readLine();
			} catch (IOException e) {
				e.printStackTrace();
			}
			return str;
		}
	}
}
