Problem:
Prime Numbers

A prime number is a natural number which has exactly two distinct natural number divisors: 1 and itself. For example, the first four prime numbers are: 2, 3, 5 and 7.

Write a program which reads a list of N integers and prints the number of prime numbers in the list.

Input

The first line contains an integer N, the number of elements in the list.

N numbers are given in the following lines.

Output

Print the number of prime numbers in the given list.

Constraints

1 ≤ N ≤ 10000

2 ≤ an element of the list ≤ 108

Sample Input 1

5
2
3
4
5
6

Sample Output 1

3

Sample Input 2

11
7
8
9
10
11
12
13
14
15
16
17

Sample Output 2

4

Solution in JAVA (judge verdict: Wrong Answer)

import java.util.Scanner;

public class Main {
    public static Scanner sc;
    public static void main(String[] args) throws Exception {
        sc = new Scanner(System.in);
        int n = sc.nextInt();
        int res = 0;
        for (int i = 0; i < n; i++) {
            int num = sc.nextInt();
            if (num == 2 || num == 3) {
                res++;
                continue;
            }
            boolean b = true;
            for (int j = 2; j*j <= num; j++) {
                b &= (num%j != 0);
            }
            if (!b) res++;
        }
        System.out.println(res);
    }
}