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Given two equal-length arrays whose elements you may reorder, minimize the sum of element-wise products by choosing an optimal pairing between elements. The core insight is a greedy pairing strategy—match large values in one array with small values in the other (e.g., sort one ascending and the other descending) to minimize the total product sum.
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Leetcode 1874. Minimize Product Sum of Two Arrays
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Source snapshot: Nov 12, 2026
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