You are given a sequence of N numbers. Count the number of even numbers in even places in it.
Input data: in the first line enters the number N, in the following lines you enter N numbers (one number per line) - the members of the sequence.
Output.
Print the number of even numbers in even places (numbered from 0 ) in the sequence.
Examples
| # |
Input |
Output |
| 1 |
5
1
2
4
5
6 |
2 |
Explanation: the numbers 4 and 6 are suitable, as they are, respectively, in the 2nd and 4th places.