Here is link to my code. I have no idea, why I am getting WA? The code looks fine to me. Could someone please point out my mistake?
Your code doesn’t even pass sample test cases. 
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Oh, I got it why It is not working. I did not consider the whitespace in the input 
Thanks to pointed out
Your code doesn’t even pass sample test cases
otherwise, I would have kept wondering what is wrong.
Input:
6
11 22 33 44 55 66
Expected Output:
6
Your Output:
12
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