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Problem Statement
You are given an array of integers. You need to implement a data structure that supports the following operations in O(log n) time:
Range Sum [L, R] (0‑indexed). Return the sum of all elements in the subarray from index L to R inclusive.
To solve this problem, you can use a segment tree data structure which allows for efficient range queries and updates. Segment trees can support range sum queries in O(log n) time by storing the sum of ranges at each node and recursively updating the sums as needed.
wintry apex