Need help in solving high range questions in c++ like:

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@munish : The editorials for this contest are posted . You may have a look at them .

If you have difficulty understanding them you may ask your doubts here .

You can get links to editorials of all problems in the contest here :

where you can register for next months contest and then when you view contest there is link for editorials of previous contest .

You problem’s editorial is at :

https://www.hackerrank.com/blog/infinitum-mar14-summing-the-k-n-series

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