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Grokking the Coding Interview Patterns

Word Pattern

Explore how to solve the word pattern problem by establishing a one-to-one mapping between pattern characters and words in a string. This lesson helps you understand hash maps and apply bijection logic to ensure each character and word pair is unique, improving your problem-solving skills for coding interviews.

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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 two characters map to the same word, and no two words map to the same character.

Constraints:

    ...