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jaswanthi's blog

Fenwick Tree, N unique elements which may have values greater than N
By jaswanthi, history, 9 years ago, In English

Given an Array N unique elements ,and some elements may contain values greater than N.

For ex: 1, 8, 2147483647

To work on Fenwick Tree, we need to adjust that to a 1 — N range. Is there a way to do this ?

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9 years ago, # |
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Sort the values, then map each value to its position in the sorted array.

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9 years ago, # |
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You can write Fenwick Tree on map( O(logMAX*logMAX) ).

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9 years ago, # |
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use co-ordinate compression.

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