Insertion in a Trie
Explore how to insert words into a trie data structure efficiently. Understand the three primary cases during insertion: no common prefix, common prefix, and when the word already exists. Learn how to implement this process in C++ with clear explanations of each step and the algorithm's time complexity.
We'll cover the following...
We'll cover the following...
Word Insertion #
The insertion process is fairly simple. For each character in the key, we check if it exists at the position we desire. If the character is not present, then we insert the corresponding trie node at the correct index in children. While inserting the last node, we also set the value of isEndWord to true.
There are three primary cases we need to consider during insertion. Let’s discuss them now.