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 C (judge verdict: Time Limit Exceeded)

#include<stdio.h>

int isPrime(int);

int main(){
  int n, i, j = 0;
  int A[10000];

  scanf("%d",&n);

  for(i = 0; i < n; i++) scanf("%d",&A[i]);
  for(i = 0; i < n; i++){
    if(isPrime(A[i]) == 1) j++;
      }

  printf("%d\n",j);

  return 0;
}

int isPrime(int x){
  int i;

  if(x <= 1) return 0;

  for(i = 2; i < x - 1; i++){
    if(x % i == 0) return 0;
  }

  return 1;
}