Web Reference: Solution intuition: We add each value 'val' to the starting index and subtract val from the (end+1)th index, thus maintaining the array in such a way that the prefix sum of the i'th index will give the value of that index. In this HackerRank in Data Structures - Array Manipulation solutions Starting with a 1-indexed array of zeros and a list of operations, for each operation add a value to each the array element between two given indices, inclusive. In this video Varun Bajlotra Sir has explained the solution to a HackerRank Problem #ArrayManipulation. Both the Brute Force approach and #OptimizedApproach (O (N+M)) have been demonstrated .
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