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>
#define N 10000
int main() 
{

  int n,flag=0,all=0;
  int a[N];
  int i,j;

  scanf("%d",&n);

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

  for(i=0; i<n; i++){
    if(a[i]==2){
      all++;
      continue;
    }
    
    for(j=2; j<a[i]; j++){
      if(a[i]%j==0){
	flag=1;
	break;
      }
    }
    
    if(flag==0) all++;
    flag=0;
  }
  
  printf("%d\n",all);

  return 0;

}