import java.util.*;

public class Main {
  public static void main(String[] args) {
    Scanner in = new Scanner(System.in);
    int N = in.nextInt();

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

    int ans = 0;
    for (int i = 1; i <= N; i += 2) {
      int count = 0;
      for (int j = 1; j <= Math.sqrt(i); j++) {
        if (i % j == 0) {
          count += 2;
        }
      }
      if (count == 8) {
        ans++;
      }
    }
    System.out.println(ans);
  }
} Main public static void main(String[] args) {
    Scanner in = new Scanner(System.in);
    int N = in.nextInt();

    int ans = 0;
    for (int i = 1; i <= N; i += 2) {
      int count = 0;
      for (int j = 1; j <= Math.sqrt(i); j++) {
        if (i % j == 0) {
          count += 2;
        }
      }
      if (count == 8) {
        ans++;
      }
    }
    System.out.println(ans);
  } main {
    Scanner in = new Scanner(System.in);
    int N = in.nextInt();

    int ans = 0;
    for (int i = 1; i <= N; i += 2) {
      int count = 0;
      for (int j = 1; j <= Math.sqrt(i); j++) {
        if (i % j == 0) {
          count += 2;
        }
      }
      if (count == 8) {
        ans++;
      }
    }
    System.out.println(ans);
  } Scanner in = new Scanner(System.in); in new Scanner(System.in) int N = in.nextInt(); N in.nextInt() in.nextInt in int ans = 0; ans 0 for (int i = 1; i <= N; i += 2) {
      int count = 0;
      for (int j = 1; j <= Math.sqrt(i); j++) {
        if (i % j == 0) {
          count += 2;
        }
      }
      if (count == 8) {
        ans++;
      }
    } int i = 1; int i = 1; i 1 i <= N i N i += 2 i += 2 i 2 {
      int count = 0;
      for (int j = 1; j <= Math.sqrt(i); j++) {
        if (i % j == 0) {
          count += 2;
        }
      }
      if (count == 8) {
        ans++;
      }
    } {
      int count = 0;
      for (int j = 1; j <= Math.sqrt(i); j++) {
        if (i % j == 0) {
          count += 2;
        }
      }
      if (count == 8) {
        ans++;
      }
    } int count = 0; count 0 for (int j = 1; j <= Math.sqrt(i); j++) {
        if (i % j == 0) {
          count += 2;
        }
      } int j = 1; int j = 1; j 1 j <= Math.sqrt(i) j Math.sqrt(i) Math.sqrt Math i j++ j++ j {
        if (i % j == 0) {
          count += 2;
        }
      } {
        if (i % j == 0) {
          count += 2;
        }
      } if (i % j == 0) {
          count += 2;
        } i % j == 0 i % j i j 0 {
          count += 2;
        } count += 2 count 2 if (count == 8) {
        ans++;
      } count == 8 count 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 in = new Scanner(System.in);
    int N = in.nextInt();

    int ans = 0;
    for (int i = 1; i <= N; i += 2) {
      int count = 0;
      for (int j = 1; j <= Math.sqrt(i); j++) {
        if (i % j == 0) {
          count += 2;
        }
      }
      if (count == 8) {
        ans++;
      }
    }
    System.out.println(ans);
  }
} public class Main {
  public static void main(String[] args) {
    Scanner in = new Scanner(System.in);
    int N = in.nextInt();

    int ans = 0;
    for (int i = 1; i <= N; i += 2) {
      int count = 0;
      for (int j = 1; j <= Math.sqrt(i); j++) {
        if (i % j == 0) {
          count += 2;
        }
      }
      if (count == 8) {
        ans++;
      }
    }
    System.out.println(ans);
  }
} Main
import java.util.*;

public class Main {
  public static void main(String[] args) {
    Scanner in = new Scanner(System.in);
    int N = in.nextInt();

    int ans = 0;
    for (int i = 1; i <= N; i += 2) {
      int count = 0;
      for (int j = 1; j <= Math.sqrt(i); j++) {
        if (i % j == 0) {
          count += 2;
        }
      }
      if (count == 8) {
        ans++;
      }
    }
    System.out.println(ans);
  }
}