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Solution: Top K Frequent Words

Explore how to implement a solution that returns the top k frequent words from a list by combining trie data structure and bucket sort. Understand the process of counting word frequencies, organizing them in tries based on frequency, and extracting results efficiently. Learn to analyze the time and space complexity of this approach.

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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