Leetcode 2013. Detect Squares

Design a data structure that supports adding points (duplicates allowed) and, for a given query point, counts how many triples of stored points together with the query form an axis-aligned square. The challenge is to efficiently enumerate and combine compatible partner points per query (coords 0–1000, ≤3000 total operations) rather than brute-forcing all triples.

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Leetcode 2013. Detect Squares

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