import java.util.*;
public class Main {

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

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

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

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