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 main(void){

  int a[10000];
  int n;
  int i,j;
  int hit=0,cnt=0;

  scanf("%d",&n);
  for(i=0;i<n;i++)scanf("%d",&a[i]);

  for(i=0;i<n;i++){
    hit=0;
    for(j=2;j<=(a[i]/2);j++){
      if((a[i]%j)==0){
	hit=1;
	break;
      }
    }
    if(hit==0)cnt++;
  }

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

  return 0;
}


  /* int n,a; */
  /* int i,j; */
  /* int hit,cnt; */

  /* scnaf("%d",&n); */

  /* for(i=0;i){ */