Aho-corasick algorithm for pattern matching in cpp.

[AniketPandey22]

The Aho-Corasick algorithm is a powerful pattern-matching algorithm that is used to search for occurrences of a set of keywords within some input text. It builds a finite state machine that resembles a trie, which allows it to efficiently handle multiple patterns simultaneously. Here's how you can implement the Aho-Corasick algorithm in C++:

Step-by-Step Implementation

1. Define the Trie Node Structure: Each node in the trie will contain information about its children, the failure link, and whether it marks the end of a word.

2. Build the Trie: Insert all the patterns into the trie.

3. Build Failure Links: These links help the algorithm skip unnecessary comparisons by connecting nodes to other nodes that represent the longest suffix which is also a prefix.

4. Search Text: Use the built trie and failure links to search the input text for the given patterns.