import java.util.Scanner;

public class Main {

	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int n = sc.nextInt();
		int q = 0;
		for (int k = 1; k <= n; k+=2){
			int cnt = 0;
			for (int h = 1; h <= k; h++) {
				if (k % h == 0) { cnt++;}
			}
			if (cnt == 8) {q++;}
		}
		System.out.println(q);
	}
}
/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