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Grokking the Coding Interview Patterns in Python

Solution: Top K Frequent Words

Explore how to efficiently identify the top K most frequent words from a list by combining trie data structures and bucket sort methods. Understand how to organize words by frequency, handle tie-breaking lex order, and analyze time and space complexity for optimal coding interview solutions.

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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