Range Sum Query - Immutable - LeetCode 303 - Coding Interview Questions

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So let's imagine we have a bunch of numbers, and these numbers are all in one line, one after the other, And the task here is to find the total sum of all numbers between two points left and right, and handle multiple queries in efficient ways.

To solve this problem we gonna use a technique called prefix sum or cumulative sum.
Next, we present the solution and walk you through the code step by step, highlighting the key points and explaining the logic behind each part of the solution.

Whether you are preparing for a technical interview or just looking to improve your coding skills, this video is a great resource.

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Understanding the Problem : (0:00)
Prefix Sum Solution : (0:41)
Complexity Analysis : (3:18)
Code Explanation : (3:36)