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What is a Trie?

Explore the trie data structure and its role in efficient string retrieval tasks. Understand its properties, common applications such as autocomplete and spell-checking, and how it organizes words sharing common prefixes to optimize search and insertion operations.

Introduction

We are going to look at a tree-like data structure that proves to be very efficient while solving programming problems related to strings.

This data structure is called a trie and is also known as a Prefix Tree. We will soon find out why.

The word trie is derived from “retrieval”. As you can guess, the main purpose of using this structure is to provide fast retrieval. Tries are mostly ...