Can you explain the concept of ACT-tree and its main purpose?

ACT-tree (Adaptive Compressed Trie) is a data structure that represents a compressed prefix tree (trie), optimized for efficient storage and search of strings or sequences.

The main purpose of the ACT-tree is to quickly perform search, insertion, and deletion operations with minimal memory usage by compressing common prefixes.

Unlike a regular trie, the ACT-tree adapts to the data, reducing redundancy and improving performance, which is useful in tasks related to autocomplete, indexing, and text processing.