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>

int prime(int n)
{
    int i, flag = 0;
    for(i=2; i<=n/2; ++i)
    {
        if(n%i==0)
        {
            flag=1;
            break;
        }
    }

    return flag;
}

 int main()
 {
    int n,c=0,t,i;
    scanf("%d",&n);
    for(i=1;i<=n;i++)
    {
        int x;
        scanf("%d",&x);
        t=prime(x);
        if(t==0)
            {
                c++;
            }
    }
    printf("%d\n",c);

}