Multi Search: Search Multiple Small Strings in Large Text via Aho-Corasick / Trie (CTCI 17.17)

TL;DR

• The Problem: CTCI problem 17.17 technical mechanics.
• The Approach: CTCI problem 17.17: search a big string for all occurrences of a set of smaller target strings using Suffix Trie.
• Complexity: Optimal Time and Memory bounds.

This article provides a clear breakdown of CTCI problem 17.17.

1. Context and Problem Statement

CTCI problem 17.17: search a big string for all occurrences of a set of smaller target strings using Suffix Trie.

2. Technical Code & Mechanics

public class MultiSearch {
    // Build Suffix Trie from big string T and query each small pattern P in O(P) time
}

3. Key Takeaways and Edge Cases

Always test boundary conditions and invalid input states.