Problem Description

  Give you a lot of positive integers, just to find out how many prime numbers there are.

Input

  There are a lot of cases. In each case, there is an integer N representing the number of integers to find. Each integer won’t exceed 32-bit signed integer, and each of them won’t be less than 2.

Output

  For each case, print the number of prime numbers you have found out.

3
2 3 4

2

Author

wangye