Solution (leetcode-in-java 1.22 API)

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
  
  All Methods Instance Methods Concrete Methods
  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 Detail
- Solution
```
public Solution()
```

Method Detail

longestWord

public String longestWord(String[] words)