Wu Shixiong's Large Model Academy

Nov 1, 2023 · Fundamentals

How to Efficiently Update Array Sums After Each Modification (O(N+Q) Solution)

Given an initial array of size n and q update operations that replace a single element each time, this article explains how to output the array's total sum after every modification using a simple O(N+q) simulation with constant extra space, and provides Python, Java, and C++ implementations.