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110. 50288 - Even numbers in even positions

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Time limit 2000/4000/4000/4000 ms. Memory limit 65000/65000/65000/65000 Kb.
Question by Ibrahim Mesecan. Difficulty Alpha

You are given a sequence of numbers. Count the even numbers which are also in even positions.
Please note that the first number is in the first position.

Input
Introduce the first number N , and then N numbers - the terms of the sequence.
Output
Display the number of even numbers on even positions in the sequence.

Input Output
5
1 2 4 5 6
1

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