import java.util.Scanner;

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