import java.util.Scanner;

public class Main{

	public static void main(String[] args) {
		// TODO Auto-generated method stub
Scanner SC = new Scanner(System.in);
int N = SC.nextInt();
int ans = 0;
for(int i = 1; i <= N; i++) {
	if(i%2 == 0) {
		continue;
	}
	int count = 0;
	for(int j = 1; j <= i; j++) {
		if(i%j == 0) {
			count++;
		}
	}
	if(count == 8) {
		ans++;
	}
}
System.out.println(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