692. Top K Frequent Words LeetCode Solution | Easy Approach

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Top K Frequent Words Given an array of strings words and an integer k, return the k most frequent strings.

Return the answer sorted by the frequency from highest to lowest. Sort the words with the same frequency by their lexicographical order.

Example 1:

Input: words = ["i","love","leetcode","i","love","coding"], k = 2
Output: ["i","love"]
Explanation: "i" and "love" are the two most frequent words.
Note that "i" comes before "love" due to a lower alphabetical order.

Example 2:

Input: words = ["the","day","is","sunny","the","the","the","sunny","is","is"], k = 4
Output: ["the","is","sunny","day"]
Explanation: "the", "is", "sunny" and "day" are the four most frequent words, with the number of occurrence being 4, 3, 2 and 1 respectively.

Constraints:

  • 1 <= words.length <= 500
  • 1 <= words[i] <= 10
  • words[i] consists of lowercase English letters.
  • k is in the range [1, The number of unique words[i]]

Top K Frequent Words Solutions

Time: O(n)
Space: O(n)

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