import java.util.Scanner;

public class Main {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int N = sc.nextInt();
		int divCount=0;
		int matchCnt=0;

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