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>
#include<stdlib.h>
int main()
{
  int i,j,num,count;
  int pri[10000];
  
  scanf("%d",&num);
  count = num;
  for(i=0; i < num; i++)
    {
      scanf("%d",&pri[i]);
      if(pri[i] < 2 || pri[i] > 10e8)
	{
	  printf("Error.\n");
	  exit(1);
	}
    }
  for(i = 0; i < num; i++ )
    {
      for( j = 2; j < pri[i]; j++)
	{
	  if( pri[i]%j == 0 )
	    {
	      count--;
	      break;
	    }    
	}
    }
  printf("%d\n",count);

  return 0;
 
}