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The Theory Behind 2D Prefix Sums - Part 1
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❗❗ASKED BEFORE ON A GOOGLE CODING INTERVIEW❗❗
2D Prefix Sums are a simple yet powerful data structure that allows one to answer static range sum queries in constant time complexity as opposed to the usual quadratic time complexity, rendering it useful in a wide range of matrix problems.
2D Prefix Sums are a simple yet powerful data structure that allows one to answer static range sum queries in constant time complexity as opposed to the usual quadratic time complexity, rendering it useful in a wide range of matrix problems.
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