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Solution: Index Pairs of a String

Explore how to implement a trie to identify all index pairs of substrings present in a string from a given list of words. Learn to build the trie, traverse it to match substrings, and manage time and space complexities to optimize search operations.

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:

  • 11 \leq text.length 100\leq 100

  • 11 \leq words.length 20\leq 20

  • 11 \leq ...