import java.util.Scanner;

public class Main {
	public static void main(String arg[]) {

		Scanner sc = new Scanner(System.in);

		int N = sc.nextInt();
		int count = 0;
		int sum = 0;

		for (int i = 1; i <= N; i++) {

			if (i % 2 == 0) {
				continue;
			}

			for (int j = 1; j <= i; j++) {
				if (i % j == 0) {
					count++;
				}
			}

			if (count == 8) {
				sum++;
			}
			count = 0;
		}

		System.out.print(sum);
	}
}
/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