Longest Word With All Prefixes
Explore how to find the longest word in an array such that every prefix of the word exists in the same array. Understand prefix concepts, implement solutions, and learn strategies to return the lexicographically smallest word when multiple options exist.
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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:
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