import java.util.Scanner;

public class Main{
    public static void main(String[] args){
	Scanner scan = new Scanner(System.in);
	
	int n = scan.nextInt();
	
	int ans = 0;
	for(int i = 1; i <= n; i += 2){
	    int count = 0;
	    for(int j = i; j >= 1; j--){
		if(i % j == 0){
		    count++;
		}
	    }
	    if(count == 8){
		ans++;
	    }
	}
	
	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