Leetcode 1992. Find All Groups of Farmland

Given an m x n binary matrix containing disjoint, axis-aligned rectangular blocks of 1s, return for each block the coordinates [r1,c1,r2,c2] of its top-left and bottom-right corners. Rectangles are non-adjacent (no four-directional touching) and m,n ≤ 300.

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Leetcode 1992. Find All Groups of Farmland

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