import java.util.*;

class Main{
	public static void main(String args[]){
		Scanner sc = new Scanner(System.in);
		int n = sc.nextInt();
		int ans = 0;
		for(int i = 1; i <= n; i=i+2){
			int tmp = 0;
			for(int j = 1; j <= i; j++){
				if(i%j==0)tmp++;
				if(tmp==9)break;
			}
			if(tmp == 8)ans++;
		}
		System.out.print(ans);
	}
} import java.util.*; util.* java class Main{
	public static void main(String args[]){
		Scanner sc = new Scanner(System.in);
		int n = sc.nextInt();
		int ans = 0;
		for(int i = 1; i <= n; i=i+2){
			int tmp = 0;
			for(int j = 1; j <= i; j++){
				if(i%j==0)tmp++;
				if(tmp==9)break;
			}
			if(tmp == 8)ans++;
		}
		System.out.print(ans);
	}
} Main public static void main(String args[]){
		Scanner sc = new Scanner(System.in);
		int n = sc.nextInt();
		int ans = 0;
		for(int i = 1; i <= n; i=i+2){
			int tmp = 0;
			for(int j = 1; j <= i; j++){
				if(i%j==0)tmp++;
				if(tmp==9)break;
			}
			if(tmp == 8)ans++;
		}
		System.out.print(ans);
	} main {
		Scanner sc = new Scanner(System.in);
		int n = sc.nextInt();
		int ans = 0;
		for(int i = 1; i <= n; i=i+2){
			int tmp = 0;
			for(int j = 1; j <= i; j++){
				if(i%j==0)tmp++;
				if(tmp==9)break;
			}
			if(tmp == 8)ans++;
		}
		System.out.print(ans);
	} Scanner sc = new Scanner(System.in); sc new Scanner(System.in) int n = sc.nextInt(); n sc.nextInt() sc.nextInt sc int ans = 0; ans 0 for(int i = 1; i <= n; i=i+2){
			int tmp = 0;
			for(int j = 1; j <= i; j++){
				if(i%j==0)tmp++;
				if(tmp==9)break;
			}
			if(tmp == 8)ans++;
		} int i = 1; int i = 1; i 1 i <= n i n i=i+2 i=i+2 i i+2 i 2 {
			int tmp = 0;
			for(int j = 1; j <= i; j++){
				if(i%j==0)tmp++;
				if(tmp==9)break;
			}
			if(tmp == 8)ans++;
		} {
			int tmp = 0;
			for(int j = 1; j <= i; j++){
				if(i%j==0)tmp++;
				if(tmp==9)break;
			}
			if(tmp == 8)ans++;
		} int tmp = 0; tmp 0 for(int j = 1; j <= i; j++){
				if(i%j==0)tmp++;
				if(tmp==9)break;
			} int j = 1; int j = 1; j 1 j <= i j i j++ j++ j {
				if(i%j==0)tmp++;
				if(tmp==9)break;
			} {
				if(i%j==0)tmp++;
				if(tmp==9)break;
			} if(i%j==0)tmp++; i%j==0 i%j i j 0 tmp++ tmp if(tmp==9)break; tmp==9 tmp 9 break; if(tmp == 8)ans++; tmp == 8 tmp 8 ans++ ans System.out.print(ans) System.out.print System.out System System.out ans String args[] args
import java.util.*;

class Main{
	public static void main(String args[]){
		Scanner sc = new Scanner(System.in);
		int n = sc.nextInt();
		int ans = 0;
		for(int i = 1; i <= n; i=i+2){
			int tmp = 0;
			for(int j = 1; j <= i; j++){
				if(i%j==0)tmp++;
				if(tmp==9)break;
			}
			if(tmp == 8)ans++;
		}
		System.out.print(ans);
	}
}
