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Solution: Word Pattern

Explore how to verify if a string's sequence of words matches a given character pattern using hash maps. Understand the one-to-one correspondence (bijection) between pattern characters and words, and learn to implement an efficient linear-time algorithm. This lesson equips you with the ability to handle pattern matching problems commonly asked in coding interviews.

Statement

You are given a pattern and a string, s. You need to determine whether the string s follows the same pattern.

A string s is said to follow a pattern if a bijection exists between a character in the pattern and a non-empty word in s.

  • Each character in the pattern must map to exactly one unique word in s.

  • Each word in s must map to exactly one unique character in pattern.

  • No ...