import java.util.*;
class Main{
    public static void main(String[] args){
        Scanner x = new Scanner(System.in);
        int s = x.nextInt();
        int prime = 0;
        for(int i=0;i<s;i++){
            if(Prime(x.nextInt())){
                prime++;
            }
        }
        System.out.println(prime);
    }
    public static boolean Prime(int p){
        boolean P =true;
        if(p<2){
            return false;
        }else{
            for(int i=2;i<=Math.sqrt(p);i++){
                if(p%i==0){
                    P = false;
                    break;
                }
            }
        }
        return P;
    }
}

/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