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<math.h>
#define N 10000

#include<stdio.h>
#define N 10000
 
int main(){
  int i=0,A[N],count=0,count2=0,n,k;
   
  scanf("%d",&n);
  for(i=0;i<n;i++) scanf("%d",&A[i]);
  for(i=0;i<n;i++){ 
    if(A[i]==2) count++;    
if(A[i]%2!=0){
    for(k=3,count2=0;k<A[i];k+=2){    
      if(A[i]%k==0){
	count2++;
	break;}}
    if(count2==0) count++;
    }}
  
  printf("%d\n",count);
  return 0;
}