import java.io.OutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.PrintWriter;
import java.util.Scanner;

/**
 * Built using CHelper plug-in
 * Actual solution is at the top
 */
public class Main {
    public static void main(String[] args) {
        InputStream inputStream = System.in;
        OutputStream outputStream = System.out;
        Scanner in = new Scanner(inputStream);
        PrintWriter out = new PrintWriter(outputStream);
        ABC106_B solver = new ABC106_B();
        solver.solve(1, in, out);
        out.close();
    }

    static class ABC106_B {
        public void solve(int testNumber, Scanner in, PrintWriter out) {
            int n = in.nextInt();
            int ans = 0;
            for (int i = 1; i <= n; i++) {
                if (i % 2 == 1) {
                    int cnt = 0;
                    for (int j = 1; j <= i; j++) {
                        if (i % j == 0) {
                            cnt++;
                        }
                    }

                    if (cnt == 8) {
                        ans++;
                    }
                }
            }

            out.print(ans);
        }

    }
}
 import java.io.OutputStream; OutputStream java.io import java.io.IOException; IOException java.io import java.io.InputStream; InputStream java.io import java.io.PrintWriter; PrintWriter java.io import java.util.Scanner; Scanner java.util public class Main {
    public static void main(String[] args) {
        InputStream inputStream = System.in;
        OutputStream outputStream = System.out;
        Scanner in = new Scanner(inputStream);
        PrintWriter out = new PrintWriter(outputStream);
        ABC106_B solver = new ABC106_B();
        solver.solve(1, in, out);
        out.close();
    }

    static class ABC106_B {
        public void solve(int testNumber, Scanner in, PrintWriter out) {
            int n = in.nextInt();
            int ans = 0;
            for (int i = 1; i <= n; i++) {
                if (i % 2 == 1) {
                    int cnt = 0;
                    for (int j = 1; j <= i; j++) {
                        if (i % j == 0) {
                            cnt++;
                        }
                    }

                    if (cnt == 8) {
                        ans++;
                    }
                }
            }

            out.print(ans);
        }

    }
} Main public static void main(String[] args) {
        InputStream inputStream = System.in;
        OutputStream outputStream = System.out;
        Scanner in = new Scanner(inputStream);
        PrintWriter out = new PrintWriter(outputStream);
        ABC106_B solver = new ABC106_B();
        solver.solve(1, in, out);
        out.close();
    } main {
        InputStream inputStream = System.in;
        OutputStream outputStream = System.out;
        Scanner in = new Scanner(inputStream);
        PrintWriter out = new PrintWriter(outputStream);
        ABC106_B solver = new ABC106_B();
        solver.solve(1, in, out);
        out.close();
    } InputStream inputStream = System.in; inputStream System.in System System.in OutputStream outputStream = System.out; outputStream System.out System System.out Scanner in = new Scanner(inputStream); in new Scanner(inputStream) PrintWriter out = new PrintWriter(outputStream); out new PrintWriter(outputStream) ABC106_B solver = new ABC106_B(); solver new ABC106_B() solver.solve(1, in, out) solver.solve solver 1 in out out.close() out.close out String[] args args static class ABC106_B {
        public void solve(int testNumber, Scanner in, PrintWriter out) {
            int n = in.nextInt();
            int ans = 0;
            for (int i = 1; i <= n; i++) {
                if (i % 2 == 1) {
                    int cnt = 0;
                    for (int j = 1; j <= i; j++) {
                        if (i % j == 0) {
                            cnt++;
                        }
                    }

                    if (cnt == 8) {
                        ans++;
                    }
                }
            }

            out.print(ans);
        }

    } ABC106_B public void solve(int testNumber, Scanner in, PrintWriter out) {
            int n = in.nextInt();
            int ans = 0;
            for (int i = 1; i <= n; i++) {
                if (i % 2 == 1) {
                    int cnt = 0;
                    for (int j = 1; j <= i; j++) {
                        if (i % j == 0) {
                            cnt++;
                        }
                    }

                    if (cnt == 8) {
                        ans++;
                    }
                }
            }

            out.print(ans);
        } solve {
            int n = in.nextInt();
            int ans = 0;
            for (int i = 1; i <= n; i++) {
                if (i % 2 == 1) {
                    int cnt = 0;
                    for (int j = 1; j <= i; j++) {
                        if (i % j == 0) {
                            cnt++;
                        }
                    }

                    if (cnt == 8) {
                        ans++;
                    }
                }
            }

            out.print(ans);
        } int n = in.nextInt(); n in.nextInt() in.nextInt in int ans = 0; ans 0 for (int i = 1; i <= n; i++) {
                if (i % 2 == 1) {
                    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++ i++ i {
                if (i % 2 == 1) {
                    int cnt = 0;
                    for (int j = 1; j <= i; j++) {
                        if (i % j == 0) {
                            cnt++;
                        }
                    }

                    if (cnt == 8) {
                        ans++;
                    }
                }
            } {
                if (i % 2 == 1) {
                    int cnt = 0;
                    for (int j = 1; j <= i; j++) {
                        if (i % j == 0) {
                            cnt++;
                        }
                    }

                    if (cnt == 8) {
                        ans++;
                    }
                }
            } if (i % 2 == 1) {
                    int cnt = 0;
                    for (int j = 1; j <= i; j++) {
                        if (i % j == 0) {
                            cnt++;
                        }
                    }

                    if (cnt == 8) {
                        ans++;
                    }
                } i % 2 == 1 i % 2 i 2 1 {
                    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 out.print(ans) out.print out ans int testNumber testNumber Scanner in in PrintWriter out out public class Main {
    public static void main(String[] args) {
        InputStream inputStream = System.in;
        OutputStream outputStream = System.out;
        Scanner in = new Scanner(inputStream);
        PrintWriter out = new PrintWriter(outputStream);
        ABC106_B solver = new ABC106_B();
        solver.solve(1, in, out);
        out.close();
    }

    static class ABC106_B {
        public void solve(int testNumber, Scanner in, PrintWriter out) {
            int n = in.nextInt();
            int ans = 0;
            for (int i = 1; i <= n; i++) {
                if (i % 2 == 1) {
                    int cnt = 0;
                    for (int j = 1; j <= i; j++) {
                        if (i % j == 0) {
                            cnt++;
                        }
                    }

                    if (cnt == 8) {
                        ans++;
                    }
                }
            }

            out.print(ans);
        }

    }
} public class Main {
    public static void main(String[] args) {
        InputStream inputStream = System.in;
        OutputStream outputStream = System.out;
        Scanner in = new Scanner(inputStream);
        PrintWriter out = new PrintWriter(outputStream);
        ABC106_B solver = new ABC106_B();
        solver.solve(1, in, out);
        out.close();
    }

    static class ABC106_B {
        public void solve(int testNumber, Scanner in, PrintWriter out) {
            int n = in.nextInt();
            int ans = 0;
            for (int i = 1; i <= n; i++) {
                if (i % 2 == 1) {
                    int cnt = 0;
                    for (int j = 1; j <= i; j++) {
                        if (i % j == 0) {
                            cnt++;
                        }
                    }

                    if (cnt == 8) {
                        ans++;
                    }
                }
            }

            out.print(ans);
        }

    }
} Main
import java.io.OutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.PrintWriter;
import java.util.Scanner;

/**
 * Built using CHelper plug-in
 * Actual solution is at the top
 */
public class Main {
    public static void main(String[] args) {
        InputStream inputStream = System.in;
        OutputStream outputStream = System.out;
        Scanner in = new Scanner(inputStream);
        PrintWriter out = new PrintWriter(outputStream);
        ABC106_B solver = new ABC106_B();
        solver.solve(1, in, out);
        out.close();
    }

    static class ABC106_B {
        public void solve(int testNumber, Scanner in, PrintWriter out) {
            int n = in.nextInt();
            int ans = 0;
            for (int i = 1; i <= n; i++) {
                if (i % 2 == 1) {
                    int cnt = 0;
                    for (int j = 1; j <= i; j++) {
                        if (i % j == 0) {
                            cnt++;
                        }
                    }

                    if (cnt == 8) {
                        ans++;
                    }
                }
            }

            out.print(ans);
        }

    }
}

