import java.util.*;

public class Main{
    public static void main(String[] args){
        Scanner scan = new Scanner(System.in);
        int n = scan.nextInt();
        int out = 0;
        for(int i = 1; i <= n; i += 2){
            if(isTrue(i)) out++;
        }
        System.out.println(out);
        scan.close();
    }
    
    public static boolean isTrue(int n){
        int c = 0;
        for(int i = 1; i < Math.sqrt(n); i++){
            if(n % i == 0) c++;
            if(c > 4) return false;
        }
        if(n % Math.sqrt(n) == 0) c++;
        if(c == 4) return true;
        else return false;
    }
}

/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