Counting Primes

Given N natural numbers, count how many of them are prime and print the count.

A prime is a natural number greater than 1 that is divisible only by 1 and itself.

The first line contains N, the number of values. N is at most 100.

The next input contains N natural numbers separated by whitespace. Each value is at most 1,000.

Print the number of prime values among the given numbers.