import java.util.*;
public class Main {
	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
		int N = sc.nextInt();
		if(N < 105){
        	System.out.println(0);
        	return;
        }
      	int Ncnt = 0;
      	for(int i = 1; i < N+1; i+=2){
          	Integer hN = (int) Math.floor(N/2);
          	int cnt = 2;
        	for(int j = 2; j < hN; j++){
              	if(i%j==0){
                	cnt++;
                }
            }
          	if(cnt==8){
              Ncnt++;
            }
        }
		System.out.println(Ncnt);
	}
}

/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