import java.util.Scanner;
public class Main {
	public static void main(String[] args) {
		Scanner sc=new Scanner(System.in);
		int n;
		n=sc.nextInt();
		int c=0;
		for(int i=1;i<=n;i++) {
			if(i%2==0)
				continue;
			if(div(i)==8)
				c++;
		}
		System.out.println(c);
	}
	
	public static int div(int n) {
		int cnt=0;
		for(int i=1;i<=n;i++) {
			if(n%i==0)
				cnt++;
		}
		return cnt;
	}
}
/tmp/hf-datasets-cache/medium/datasets/42704881117311-config-parquet-and-info-qiankunmu-Project_CodeNet-896c9d36/hub/datasets--qiankunmu--Project_CodeNet_Python800_and_Java250/snapshots/c899fde44a77ba1cc14973ed3de064e4ff3aadc7/Project_CodeNet_Java250.tar.gz