Leetcode Problem 890. Find and Replace Pattern

890. Find and Replace Pattern

Leetcode Solutions

Matching Pattern with Bijection

  1. Initialize an empty list matches to store words that match the pattern.
  2. Iterate over each word in the words list.
  3. For each word, create two dictionaries: pattern_to_word and word_to_pattern.
  4. Iterate over the characters in the word and the corresponding characters in the pattern.
  5. If the character from the pattern is not in pattern_to_word, add the mapping pattern_to_word[pattern_char] = word_char.
  6. If the character from the word is not in word_to_pattern, add the mapping word_to_pattern[word_char] = pattern_char.
  7. If either mapping already exists and does not match the current characters, break the loop as the word does not match the pattern.
  8. If the loop completes without breaking, add the word to the matches list.
  9. Return the matches list.
UML Thumbnail

Pattern Matching with Character Normalization

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