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Grokking the Coding Interview Patterns in C++

Solution: Shortest Word Distance II

Understand how to design and implement the WordDistance class in C++ that preprocesses an array of words for efficient shortest distance queries. Learn to use a dictionary to store word indices and apply a two-pointer method to find minimal distances efficiently with optimized time and space complexity.

We'll cover the following...

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 ...