easyArraysPattern: Prefix Sum
Range Sum Query Using Prefix Sum Solution
Problem Statement
You are given an array of integers `points` representing the points scored by a team in each match. Implement a function to calculate the total points scored by the team in a given range of matches `[left, right]`. Use the prefix sum technique to efficiently compute the cumulative sum of points scored up to each match.
Constraints
- The number of matches played by the team does not exceed 10^5.
- The points scored by the team in each match do not exceed 10^4.
- The range of matches is always valid and within the bounds of the array of points scored.
- The input array is non-empty and contains at least one element.
Time: O(N) Space: O(1)
Cumulative sum for range queries
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