import java.util.*;

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

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