import java.util.Scanner;

public class Main {

	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int N = Integer.parseInt(sc.next());
		sc.close();

		int count = 0;
		for(int i = 1; i <= N; i++) {
			int yaku = 0;
			if(i % 2 == 1) {
				for(int j = 1; j <= N; j++) {
					if(i % j == 0) {
						yaku++;
					}
				}
				if(yaku == 8) {
					count++;
				}
			}else {
				continue;
			}
		}
		System.out.println(count);
	}
}
/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