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: Accepted)

#include<stdio.h>

int main(void){
    int n;
    int x=0;
    scanf("%d",&n);
    float a;
    int b;
    for(int i=0;i<n;i++){
        scanf("%d",&b);
        a=b;
        for(int t=2;t<=a;t++){
            if(b%t==0){
                if(t>=a){
                    x++;
                }
                break;
            }
            a=b/t;
            if(t>=a){
                x++;
            }
        }
    }
    printf("%d\n",x);
    
    return 0;
}