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


/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