import java.util.*;
import static java.lang.Math.*;
import java.math.BigInteger;

public class Main {
	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
		
		// 入力
		int n = sc.nextInt();
		
		// 計算
		int result = 0;
		for(int i = 1; i <= n; i++){
		    if(i%2 == 0) continue;
		    int cnt = 0;
		    for(int j = 1; j <= i; j++){
		        if(i%j == 0) cnt++;
		    }
		    if(cnt == 8) result++;
		}
		
		// 出力
		System.out.println(result);
	}
} import java.util.*; util.* java import static java.lang.Math.*; import static java.lang.Math.*; import static java.lang.Math.*; import java.math.BigInteger; BigInteger java.math public class Main {
	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
		
		// 入力
		int n = sc.nextInt();
		
		// 計算
		int result = 0;
		for(int i = 1; i <= n; i++){
		    if(i%2 == 0) continue;
		    int cnt = 0;
		    for(int j = 1; j <= i; j++){
		        if(i%j == 0) cnt++;
		    }
		    if(cnt == 8) result++;
		}
		
		// 出力
		System.out.println(result);
	}
} Main public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
		
		// 入力
		int n = sc.nextInt();
		
		// 計算
		int result = 0;
		for(int i = 1; i <= n; i++){
		    if(i%2 == 0) continue;
		    int cnt = 0;
		    for(int j = 1; j <= i; j++){
		        if(i%j == 0) cnt++;
		    }
		    if(cnt == 8) result++;
		}
		
		// 出力
		System.out.println(result);
	} main {
		Scanner sc = new Scanner(System.in);
		
		// 入力
		int n = sc.nextInt();
		
		// 計算
		int result = 0;
		for(int i = 1; i <= n; i++){
		    if(i%2 == 0) continue;
		    int cnt = 0;
		    for(int j = 1; j <= i; j++){
		        if(i%j == 0) cnt++;
		    }
		    if(cnt == 8) result++;
		}
		
		// 出力
		System.out.println(result);
	} Scanner sc = new Scanner(System.in); sc new Scanner(System.in) int n = sc.nextInt(); n sc.nextInt() sc.nextInt sc int result = 0; result 0 for(int i = 1; i <= n; i++){
		    if(i%2 == 0) continue;
		    int cnt = 0;
		    for(int j = 1; j <= i; j++){
		        if(i%j == 0) cnt++;
		    }
		    if(cnt == 8) result++;
		} int i = 1; int i = 1; i 1 i <= n i n i++ i++ i {
		    if(i%2 == 0) continue;
		    int cnt = 0;
		    for(int j = 1; j <= i; j++){
		        if(i%j == 0) cnt++;
		    }
		    if(cnt == 8) result++;
		} {
		    if(i%2 == 0) continue;
		    int cnt = 0;
		    for(int j = 1; j <= i; j++){
		        if(i%j == 0) cnt++;
		    }
		    if(cnt == 8) result++;
		} if(i%2 == 0) continue; i%2 == 0 i%2 i 2 0 continue; 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 if(cnt == 8) result++; cnt == 8 cnt 8 result++ result System.out.println(result) System.out.println System.out System System.out result String[] args args public class Main {
	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
		
		// 入力
		int n = sc.nextInt();
		
		// 計算
		int result = 0;
		for(int i = 1; i <= n; i++){
		    if(i%2 == 0) continue;
		    int cnt = 0;
		    for(int j = 1; j <= i; j++){
		        if(i%j == 0) cnt++;
		    }
		    if(cnt == 8) result++;
		}
		
		// 出力
		System.out.println(result);
	}
} public class Main {
	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
		
		// 入力
		int n = sc.nextInt();
		
		// 計算
		int result = 0;
		for(int i = 1; i <= n; i++){
		    if(i%2 == 0) continue;
		    int cnt = 0;
		    for(int j = 1; j <= i; j++){
		        if(i%j == 0) cnt++;
		    }
		    if(cnt == 8) result++;
		}
		
		// 出力
		System.out.println(result);
	}
} Main
import java.util.*;
import static java.lang.Math.*;
import java.math.BigInteger;

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