Prefix Sums in 2 Minutes | Prefix Sum Algorithm Explained
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Prefix Sums in 2 Minutes | Prefix Sum Algorithm Explained
Learn prefix sums in 2 minutes. Prefix sums are a simple technique that let you answer range sum queries fast. Instead of repeatedly looping through part of an array, we build a helper array that stores running totals. Then each range sum can be calculated in O(1) using one subtraction. In this video, we cover: - What prefix sums are - How to ...
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