Barclyas HackerEarth Challenge

How??? Because when I calculate by using brute force and above algorithm all test case give same answers.

Is output of {1,2} in your code 9 ?? As given in this post itself ?

Single 2 means the array size is 1 only ??

Nope 2 meaning all elements from 1 to 2

Nope because my program take pairs a(I), a(j) where I<j

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I had posted the divisor sieve for the CountAll question.

Not really , this was my first good Bit Manipulation question as well.

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