{ "data": { "question": { "questionId": "720", "questionFrontendId": "720", "boundTopicId": null, "title": "Longest Word in Dictionary", "titleSlug": "longest-word-in-dictionary", "content": "

Given an array of strings words representing an English Dictionary, return the longest word in words that can be built one character at a time by other words in words.

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If there is more than one possible answer, return the longest word with the smallest lexicographical order. If there is no answer, return the empty string.

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Example 1:

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\nInput: words = ["w","wo","wor","worl","world"]\nOutput: "world"\nExplanation: The word "world" can be built one character at a time by "w", "wo", "wor", and "worl".\n
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Example 2:

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\nInput: words = ["a","banana","app","appl","ap","apply","apple"]\nOutput: "apple"\nExplanation: Both "apply" and "apple" can be built from other words in the dictionary. However, "apple" is lexicographically smaller than "apply".\n
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Constraints:

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