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Grokking the Coding Interview Patterns in C#

Solution: Top K Frequent Words

Explore how to implement a solution that returns the top K most frequent words from a list. Learn to use tries and bucket sort to efficiently organize and retrieve words sorted by frequency and lexicographical order. Understand the time and space complexity of this approach and apply it in coding interviews.

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Statement

Given a list of strings words and an integer k, return the k most frequently occurring strings.

Note: The result should be sorted in descending order based on frequency. If multiple words have the same frequency, they should be sorted in lexicographical order.

Constraints:

  • 1≤1 \leq words.length ≤100\leq 100

  • 1≤1 \leq words[i].length ≤10\leq 10

  • 1≤1 \leqk ≤\leq number of unique words in the list

  • words[i] consists of lowercase English letters. ...

Solution