Leetcode 692. Top K Frequent Words

Count word frequencies and return the k most frequent words sorted by descending frequency, breaking ties by lexicographical order. The core challenge is combining frequency counting with an efficient top-k selection (e.g., hash map plus a min-heap or partial sort) to meet the O(n log k) time / O(n) space follow-up.

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Leetcode 692. Top K Frequent Words

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