import java.util.Scanner;
class Main{
    public static void main(String arg[]){
        Scanner scn=new Scanner(System.in);
        int n = scn.nextInt();
        int answer=1;
        if(n<105){
            System.out.println(0);
        }else{
            for(int i= 107;i<=n;i+=2){
                int cnt=0;
                for(int j=1;j<=i;j+=2){
                    if(i%j==0){
                        cnt++;
                    }
                }
                if(cnt==8) answer++;
            }
            System.out.println(answer);
        }
    }
}
/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