import java.io.*;
import java.util.*;


public class Main {


    private void solve(InputReader in, PrintWriter out) {
        int n = in.nextInt();
        int count = 0;
        int countMax = 0;
        for (int i = 1; i <= n; i++) {
            for (int j = 1; j <= i; j++) {
                if (i % 2 != 0) {
                    if ((i % j) == 0) {
                        count++;
                    }
                }
            }
            if (count == 8) {
                countMax++;
            }
            count = 0;
        }
        out.println(countMax);
    }


    public static void main(String[] args) {
        new Main().run();
    }

    private void run() {
        try (
                InputReader in = new InputReader(System.in);
                PrintWriter out = new PrintWriter(System.out)) {
            solve(in, out);
        }
    }


    static class InputReader implements AutoCloseable {
        private BufferedReader reader;
        private StringTokenizer tokenizer;

        public InputReader(InputStream stream) {
            reader = new BufferedReader(new InputStreamReader(stream), 32768);
            tokenizer = null;
        }

        public String next() {
            while (tokenizer == null || !tokenizer.hasMoreTokens()) {
                try {
                    tokenizer = new StringTokenizer(reader.readLine());
                } catch (IOException e) {
                    throw new RuntimeException(e);
                }
            }
            return tokenizer.nextToken();
        }


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

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

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

        @Override
        public void close() {

        }
    }


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


    private void solve(InputReader in, PrintWriter out) {
        int n = in.nextInt();
        int count = 0;
        int countMax = 0;
        for (int i = 1; i <= n; i++) {
            for (int j = 1; j <= i; j++) {
                if (i % 2 != 0) {
                    if ((i % j) == 0) {
                        count++;
                    }
                }
            }
            if (count == 8) {
                countMax++;
            }
            count = 0;
        }
        out.println(countMax);
    }


    public static void main(String[] args) {
        new Main().run();
    }

    private void run() {
        try (
                InputReader in = new InputReader(System.in);
                PrintWriter out = new PrintWriter(System.out)) {
            solve(in, out);
        }
    }


    static class InputReader implements AutoCloseable {
        private BufferedReader reader;
        private StringTokenizer tokenizer;

        public InputReader(InputStream stream) {
            reader = new BufferedReader(new InputStreamReader(stream), 32768);
            tokenizer = null;
        }

        public String next() {
            while (tokenizer == null || !tokenizer.hasMoreTokens()) {
                try {
                    tokenizer = new StringTokenizer(reader.readLine());
                } catch (IOException e) {
                    throw new RuntimeException(e);
                }
            }
            return tokenizer.nextToken();
        }


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

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

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

        @Override
        public void close() {

        }
    }


} Main private void solve(InputReader in, PrintWriter out) {
        int n = in.nextInt();
        int count = 0;
        int countMax = 0;
        for (int i = 1; i <= n; i++) {
            for (int j = 1; j <= i; j++) {
                if (i % 2 != 0) {
                    if ((i % j) == 0) {
                        count++;
                    }
                }
            }
            if (count == 8) {
                countMax++;
            }
            count = 0;
        }
        out.println(countMax);
    } solve {
        int n = in.nextInt();
        int count = 0;
        int countMax = 0;
        for (int i = 1; i <= n; i++) {
            for (int j = 1; j <= i; j++) {
                if (i % 2 != 0) {
                    if ((i % j) == 0) {
                        count++;
                    }
                }
            }
            if (count == 8) {
                countMax++;
            }
            count = 0;
        }
        out.println(countMax);
    } int n = in.nextInt(); n in.nextInt() in.nextInt in int count = 0; count 0 int countMax = 0; countMax 0 for (int i = 1; i <= n; i++) {
            for (int j = 1; j <= i; j++) {
                if (i % 2 != 0) {
                    if ((i % j) == 0) {
                        count++;
                    }
                }
            }
            if (count == 8) {
                countMax++;
            }
            count = 0;
        } int i = 1; int i = 1; i 1 i <= n i n i++ i++ i {
            for (int j = 1; j <= i; j++) {
                if (i % 2 != 0) {
                    if ((i % j) == 0) {
                        count++;
                    }
                }
            }
            if (count == 8) {
                countMax++;
            }
            count = 0;
        } {
            for (int j = 1; j <= i; j++) {
                if (i % 2 != 0) {
                    if ((i % j) == 0) {
                        count++;
                    }
                }
            }
            if (count == 8) {
                countMax++;
            }
            count = 0;
        } for (int j = 1; j <= i; j++) {
                if (i % 2 != 0) {
                    if ((i % j) == 0) {
                        count++;
                    }
                }
            } int j = 1; int j = 1; j 1 j <= i j i j++ j++ j {
                if (i % 2 != 0) {
                    if ((i % j) == 0) {
                        count++;
                    }
                }
            } {
                if (i % 2 != 0) {
                    if ((i % j) == 0) {
                        count++;
                    }
                }
            } if (i % 2 != 0) {
                    if ((i % j) == 0) {
                        count++;
                    }
                } i % 2 != 0 i % 2 i 2 0 {
                    if ((i % j) == 0) {
                        count++;
                    }
                } if ((i % j) == 0) {
                        count++;
                    } (i % j) == 0 (i % j) i j 0 {
                        count++;
                    } count++ count if (count == 8) {
                countMax++;
            } count == 8 count 8 {
                countMax++;
            } countMax++ countMax count = 0 count 0 out.println(countMax) out.println out countMax InputReader in in PrintWriter out out public static void main(String[] args) {
        new Main().run();
    } main {
        new Main().run();
    } new Main().run() new Main().run new Main() String[] args args private void run() {
        try (
                InputReader in = new InputReader(System.in);
                PrintWriter out = new PrintWriter(System.out)) {
            solve(in, out);
        }
    } run {
        try (
                InputReader in = new InputReader(System.in);
                PrintWriter out = new PrintWriter(System.out)) {
            solve(in, out);
        }
    } try (
                InputReader in = new InputReader(System.in);
                PrintWriter out = new PrintWriter(System.out)) {
            solve(in, out);
        } {
            solve(in, out);
        } InputReader in = new InputReader(System.in) InputReader in = new InputReader(System.in) new InputReader(System.in) PrintWriter out = new PrintWriter(System.out) PrintWriter out = new PrintWriter(System.out) new PrintWriter(System.out) solve(in, out) solve in out static class InputReader implements AutoCloseable {
        private BufferedReader reader;
        private StringTokenizer tokenizer;

        public InputReader(InputStream stream) {
            reader = new BufferedReader(new InputStreamReader(stream), 32768);
            tokenizer = null;
        }

        public String next() {
            while (tokenizer == null || !tokenizer.hasMoreTokens()) {
                try {
                    tokenizer = new StringTokenizer(reader.readLine());
                } catch (IOException e) {
                    throw new RuntimeException(e);
                }
            }
            return tokenizer.nextToken();
        }


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

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

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

        @Override
        public void close() {

        }
    } InputReader private BufferedReader reader; reader private StringTokenizer tokenizer; tokenizer public InputReader(InputStream stream) {
            reader = new BufferedReader(new InputStreamReader(stream), 32768);
            tokenizer = null;
        } InputReader {
            reader = new BufferedReader(new InputStreamReader(stream), 32768);
            tokenizer = null;
        } reader = new BufferedReader(new InputStreamReader(stream), 32768) reader new BufferedReader(new InputStreamReader(stream), 32768) tokenizer = null tokenizer null InputStream stream stream public String next() {
            while (tokenizer == null || !tokenizer.hasMoreTokens()) {
                try {
                    tokenizer = new StringTokenizer(reader.readLine());
                } catch (IOException e) {
                    throw new RuntimeException(e);
                }
            }
            return tokenizer.nextToken();
        } next {
            while (tokenizer == null || !tokenizer.hasMoreTokens()) {
                try {
                    tokenizer = new StringTokenizer(reader.readLine());
                } catch (IOException e) {
                    throw new RuntimeException(e);
                }
            }
            return tokenizer.nextToken();
        } while (tokenizer == null || !tokenizer.hasMoreTokens()) {
                try {
                    tokenizer = new StringTokenizer(reader.readLine());
                } catch (IOException e) {
                    throw new RuntimeException(e);
                }
            } tokenizer == null || !tokenizer.hasMoreTokens() tokenizer == null tokenizer null !tokenizer.hasMoreTokens() tokenizer.hasMoreTokens() tokenizer.hasMoreTokens tokenizer {
                try {
                    tokenizer = new StringTokenizer(reader.readLine());
                } catch (IOException e) {
                    throw new RuntimeException(e);
                }
            } try {
                    tokenizer = new StringTokenizer(reader.readLine());
                } catch (IOException e) {
                    throw new RuntimeException(e);
                } catch (IOException e) {
                    throw new RuntimeException(e);
                } IOException e {
                    throw new RuntimeException(e);
                } throw new RuntimeException(e); new RuntimeException(e) {
                    tokenizer = new StringTokenizer(reader.readLine());
                } tokenizer = new StringTokenizer(reader.readLine()) tokenizer new StringTokenizer(reader.readLine()) return tokenizer.nextToken(); tokenizer.nextToken() tokenizer.nextToken tokenizer public int nextInt() {
            return Integer.parseInt(next());
        } nextInt {
            return Integer.parseInt(next());
        } return Integer.parseInt(next()); Integer.parseInt(next()) Integer.parseInt Integer next() next public long nextLong() {
            return Long.parseLong(next());
        } nextLong {
            return Long.parseLong(next());
        } return Long.parseLong(next()); Long.parseLong(next()) Long.parseLong Long next() next public double nextDouble() {
            return Double.parseDouble(next());
        } nextDouble {
            return Double.parseDouble(next());
        } return Double.parseDouble(next()); Double.parseDouble(next()) Double.parseDouble Double next() next @Override
        public void close() {

        } close {

        } AutoCloseable public class Main {


    private void solve(InputReader in, PrintWriter out) {
        int n = in.nextInt();
        int count = 0;
        int countMax = 0;
        for (int i = 1; i <= n; i++) {
            for (int j = 1; j <= i; j++) {
                if (i % 2 != 0) {
                    if ((i % j) == 0) {
                        count++;
                    }
                }
            }
            if (count == 8) {
                countMax++;
            }
            count = 0;
        }
        out.println(countMax);
    }


    public static void main(String[] args) {
        new Main().run();
    }

    private void run() {
        try (
                InputReader in = new InputReader(System.in);
                PrintWriter out = new PrintWriter(System.out)) {
            solve(in, out);
        }
    }


    static class InputReader implements AutoCloseable {
        private BufferedReader reader;
        private StringTokenizer tokenizer;

        public InputReader(InputStream stream) {
            reader = new BufferedReader(new InputStreamReader(stream), 32768);
            tokenizer = null;
        }

        public String next() {
            while (tokenizer == null || !tokenizer.hasMoreTokens()) {
                try {
                    tokenizer = new StringTokenizer(reader.readLine());
                } catch (IOException e) {
                    throw new RuntimeException(e);
                }
            }
            return tokenizer.nextToken();
        }


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

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

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

        @Override
        public void close() {

        }
    }


} public class Main {


    private void solve(InputReader in, PrintWriter out) {
        int n = in.nextInt();
        int count = 0;
        int countMax = 0;
        for (int i = 1; i <= n; i++) {
            for (int j = 1; j <= i; j++) {
                if (i % 2 != 0) {
                    if ((i % j) == 0) {
                        count++;
                    }
                }
            }
            if (count == 8) {
                countMax++;
            }
            count = 0;
        }
        out.println(countMax);
    }


    public static void main(String[] args) {
        new Main().run();
    }

    private void run() {
        try (
                InputReader in = new InputReader(System.in);
                PrintWriter out = new PrintWriter(System.out)) {
            solve(in, out);
        }
    }


    static class InputReader implements AutoCloseable {
        private BufferedReader reader;
        private StringTokenizer tokenizer;

        public InputReader(InputStream stream) {
            reader = new BufferedReader(new InputStreamReader(stream), 32768);
            tokenizer = null;
        }

        public String next() {
            while (tokenizer == null || !tokenizer.hasMoreTokens()) {
                try {
                    tokenizer = new StringTokenizer(reader.readLine());
                } catch (IOException e) {
                    throw new RuntimeException(e);
                }
            }
            return tokenizer.nextToken();
        }


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

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

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

        @Override
        public void close() {

        }
    }


} Main
import java.io.*;
import java.util.*;


public class Main {


    private void solve(InputReader in, PrintWriter out) {
        int n = in.nextInt();
        int count = 0;
        int countMax = 0;
        for (int i = 1; i <= n; i++) {
            for (int j = 1; j <= i; j++) {
                if (i % 2 != 0) {
                    if ((i % j) == 0) {
                        count++;
                    }
                }
            }
            if (count == 8) {
                countMax++;
            }
            count = 0;
        }
        out.println(countMax);
    }


    public static void main(String[] args) {
        new Main().run();
    }

    private void run() {
        try (
                InputReader in = new InputReader(System.in);
                PrintWriter out = new PrintWriter(System.out)) {
            solve(in, out);
        }
    }


    static class InputReader implements AutoCloseable {
        private BufferedReader reader;
        private StringTokenizer tokenizer;

        public InputReader(InputStream stream) {
            reader = new BufferedReader(new InputStreamReader(stream), 32768);
            tokenizer = null;
        }

        public String next() {
            while (tokenizer == null || !tokenizer.hasMoreTokens()) {
                try {
                    tokenizer = new StringTokenizer(reader.readLine());
                } catch (IOException e) {
                    throw new RuntimeException(e);
                }
            }
            return tokenizer.nextToken();
        }


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

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

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

        @Override
        public void close() {

        }
    }


}
