
import java.util.Scanner;

public class Main {
	public static void main(String[] args) {
		Scanner scanner = new Scanner(System.in);
		int x = scanner.nextInt();
		int sum = 0;
		for (int i = 0; i < x; i++) {
			if (isPrime(scanner.nextInt()))
				sum++;
		}
		System.out.println(sum);
	}

	public static boolean isPrime(int i) {
		if (i == 2)
			return true;
		if (i % 2 == 0)
			return false;
		int k = 3;
		while (k <= Math.sqrt(i)) {
			if (i % k == 0)
				return false;
			k += 2;
		}
		return true;
	}
}
/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