Solution: Longest Word With All Prefixes
Explore how to use trie structures to efficiently find the longest word where every prefix is also a valid word in a given list. Understand how to build and traverse a trie, and apply this approach to solve prefix-related string problems commonly asked in coding interviews.
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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:
words.length...