Leetcode Problem 2744. Find Maximum Number of String Pairs

2744. Find Maximum Number of String Pairs

Leetcode Solutions

Using a Hash Map to Count Pairs

  1. Initialize a hash map word_count to store the counts of each word or its reverse.
  2. Iterate over the array words.
    • For each word, determine the lexicographically smaller of the word and its reverse.
    • Increment the count for this word in the hash map.
  3. Initialize a variable pairs to store the total number of pairs.
  4. Iterate over the values in the hash map.
    • For each count, add count // 2 to pairs.
  5. Return the total number of pairs pairs.
UML Thumbnail

Brute Force Pair Matching

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