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Grokking the Coding Interview Patterns

Solution: Top K Frequent Elements

Explore methods to identify the k most frequent elements in an integer array. Learn how to build frequency maps, implement min heaps for optimal retrieval, and understand the time and space complexities involved. This lesson helps you apply these strategies to solve top K elements problems effectively in coding interviews.

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Statement

Given an array of integers, arr, and an integer, k, return the kk most frequent elements.

Note: You can return the answer in any order.

Constraints:

  • 11 ≤\leq arr.length ≤\leq 10310^{3}
  • −10−4-10^{-4} ≤\leq arr[i] ≤\leq 10410^{4}
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