Is it possible to write Fenwick tree for sum in segment and for update(+val) in segment? And is it optimally?
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Is it possible to write Fenwick tree for sum in segment and for update(+val) in segment? And is it optimally?
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https://petr-mitrichev.blogspot.com/2013/05/fenwick-tree-range-updates.html
Here's a more detailed explanation: https://www.geeksforgeeks.org/binary-indexed-tree-range-update-range-queries/