Package g0701_0800.s0720_longest_word_in_dictionary

Class Solution

java.lang.Object

g0701_0800.s0720_longest_word_in_dictionary.Solution

public class Solution
extends Object

720 - Longest Word in Dictionary.

Medium

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.

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.

Example 1:

Input: words = [“w”,“wo”,“wor”,“worl”,“world”]

Output: “world”

Explanation: The word “world” can be built one character at a time by “w”, “wo”, “wor”, and “worl”.

Example 2:

Input: words = [“a”,“banana”,“app”,“appl”,“ap”,“apply”,“apple”]

Output: “apple”

Explanation: Both “apply” and “apple” can be built from other words in the dictionary. However, “apple” is lexicographically smaller than “apply”.

Constraints:

• 1 <= words.length <= 1000
• 1 <= words[i].length <= 30
• words[i] consists of lowercase English letters.

Constructor Summary

Constructors

Constructor	Description
Solution()

Method Summary

Modifier and Type	Method	Description
String	longestWord(String[] words)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

Solution

public Solution()

Method Details

longestWord

public String longestWord(String[] words)