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Solution: Top K Frequent Words

Explore how to implement a solution that finds the top k most frequent words by combining a frequency map, bucket sort, and trie data structure. Understand how these tools work together to efficiently count, organize, and retrieve words sorted by frequency and lexicographical order.

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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

This solution utilizes the trie data structure and bucket sort method to find the top k elements in a list. It achieves this by combining a bucket sort technique (which groups words based on their frequencies), a trie (which stores words in an organized manner), and a frequency map (which counts the occurrences of each word). ...