Leetcode 1292. Maximum Side Length of a Square with Sum Less than or Equal to Threshold

Find the largest side length k such that there exists a k×k submatrix with sum ≤ threshold; typical approaches use 2D prefix sums to query square sums efficiently and binary search (or scan) over k given m,n ≤ 300.

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Leetcode 1292. Maximum Side Length of a Square with Sum Less than or Equal to Threshold

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