Solution: Longest Word With All Prefixes
Explore how to use trie data structures to find the longest word in a list such that every prefix is also a valid word. Learn to build and traverse a trie, validate prefixes quickly, and select the lexicographically smallest word when multiple candidates match length.
We'll cover the following...
We'll cover the following...
Statement
You are given an array of strings, words. Your task is to find the longest string in words such that every prefix of this string is also present in words.
A prefix of a string is any leading substring. For example, the prefixes of "apple" are "a", "ap", "app", and "appl".
If multiple valid strings have the same maximum length, return the lexicographically smallest one.
If no such string exists, return an empty string
"".
Constraints:
...