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Leetcode 427. Construct Quad Tree
Given an n×n binary grid (n a power of two), recursively build a quadtree by subdividing the grid into four equal quadrants until each region is uniform, creating a leaf node with val equal to the region's bit or an internal node with four children otherwise. The task is essentially a divide-and-conquer check for uniform subgrids and construction of the corresponding quadtree structure.
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Late February, 2025
Uber
Mid-level
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