import java.util.Scanner;

public class Main {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		//List<String> list= new ArrayList<String>(Arrays.asList(s.split("")));
		//List<Integer> list=new ArrayList<Integer>();
		//Integer[] array = new Integer[m];
		int n = sc.nextInt();
		int count=0;
		if(n<105) {
			System.out.println(0);
			System.exit(0);
		}
		else {
			for(int i=105;n+1>i;i=i+2) {
				int how =0;
				for(int j=1;i+1>j;j++) {
					if(i%j==0)
						how++;
				}
				if(how==8) {
					count++;
				}
				//System.out.println(how);
			}
		}
		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