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 java.lang.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
    java.lang.String
    longestWord(java.lang.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 java.lang.String longestWord(java.lang.String[] words)