<ul><li>Prefix sum is a technique that involves creating a running total as you move through a list of numbers.</li><li>Binary search is a technique used to efficiently find a target value in a sorted list by repeatedly dividing the search space in half.</li><li>Prefix sum allows for fast calculation of the sum of any range in an array.</li><li>Both prefix sum and binary search are powerful techniques that can greatly improve the efficiency of programs.</li></ul>

The Magic of Prefix Sum and Binary Search: A Simple Guide

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