BooleanStack

algorithm / algorithms / array / arrays / ascii / binary-search / bubble-sort / bucket-sort / combinatorics / competitive programming / data-structures / depth-first-search / graph-algorithms / hash-set / hash-table / hashmap / heap / inclusion-exclusion / leetcode / leetcode-easy / linear-scan / matrix / optimization / prefix-sum / searching / sorting / string-manipulation / tree-traversal / two-pointers

December 1, 2025

347. Top K Frequent Elements

Master LeetCode's Top K Frequent Elements problem with expert insights into optimal O(N) bucket sort, efficient O(N log K) min-heap, and advanced quickselect solutions for finding the most frequent items in an array.

algorithm data-structures hashmap heap bucket-sort