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Grokking the Coding Interview Patterns in C++

Solution: Index Pairs of a String

Explore how to efficiently locate all index pairs of substrings in a text that match a given list of words by using a trie data structure. Understand the trie implementation, traversal for substring matching, and analyze the algorithm's time and space complexity to enhance your approach to string manipulation problems in coding interviews.

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Statement

Given a string text and an array of strings words, return a list of all index pairs [i, j] such that the substring text[i...j] is present in words.

Return the pairs [i, j] in sorted order, first by the value of i, and if two pairs have the same i, by the value of j.

Constraints:

  • 1≤1 \leq text.length ≤100\leq 100

  • 1≤1 \leq words.length ≤20\leq 20 ...