import java.util.Scanner;

public class Main {

	public static void main(String[] args) {
		
		Scanner sc = new Scanner(System.in);
		
		int N = sc.nextInt();
		sc.close();
		
		int total = 0;
		for(int a = 1 ; a <= N ; a += 2){
			int count = 0;
				for(int b = 1 ; b <= a ; b += 2){
					if(a % b == 0){
						count++;
					}
				}
			if(count == 8){
				total++;
			}				
		}		
		System.out.println(total);
	}
}
/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