import java.util.*;
import java.lang.*;

public class Main {
    static boolean isPrime(int x) {
        for(int i = 2; i <= Math.sqrt(x); i++) {
            if(x % i == 0) return false;
        }
        return true;
    }

    public static void main (String[] args) {
        Scanner sc = new Scanner(System.in);
        int n  = sc.nextInt();
        int flag = 0, sum = 0;
        while (flag  < n) {
            if(isPrime(sc.nextInt())) sum++;
            flag++;
        }
        System.out.println(sum);
    }
}
/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