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Grokking the Coding Interview Patterns in C++

Solution: Shortest Word Distance II

Understand how to design and implement a WordDistance class that efficiently computes the shortest distance between two different words in an array. Learn to use a dictionary-based approach and two-pointer technique for quick queries, balancing time and space complexity.

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Statement

Design a data structure that takes in an array of strings and efficiently computes the shortest distance between any two different strings in the array.

Implement the WordDistance class:

  • WordDistance(String[] wordsDict): Initializes the object with an array of strings.

  • int shortest(String word1, String word2): Returns the shortest distance between word1 and word2 in the array of strings.

Constraints:

  • 1≤1 \leq wordsDict.length ≤103\leq10^3

  • 1≤1 \leq wordsDict[i].length ...