3-D Structure fenwick tree

#1

i want to solve it by mapping 3d array into 1d array
using offset calculation

#2
#3

@abinkumarspn
I dont think your mapping from 3D to 1D is correct
I request you to once dry run it on the sample cases
You will need up update certain segments in the 1D array and not a contiguous segment like you are trying

#4

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