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Grokking the Coding Interview Patterns in C#

Solution: Top K Frequent Elements

Explore techniques to identify the top k most frequent elements in an integer array. Learn to build a frequency map and use a min heap to maintain the k elements with highest occurrence, optimizing both time and space complexity. This lesson will help you implement an efficient solution that balances performance and correctness.

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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}
  • 10−410^{-4} ≤\leq arr[i] ≤\leq 10410^{4}
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