Solution: Longest Word With All Prefixes
Explore how to implement a trie to solve the problem of finding the longest word with every prefix present in a given array. Learn to insert words into a prefix tree, validate words by checking their prefixes, and determine the longest valid word, ensuring both length and lexicographical order criteria are met.
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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...