Given a non-empty string s and a dictionary wordDict containing a list of non-empty words, add spaces in s to construct a sentence where each word is a valid dictionary word. Return all such possible sentences.
Note
- The same word in the dictionary may be reused multiple times in the segmentation.
- You may assume the dictionary does not contain duplicate words.
Example
No.1
Input:
s = “catsanddog”
wordDict = [“cat”, “cats”, “and”, “sand”, “dog”]
Output:
[
“cats and dog”,
“cat sand dog”
]
No.2
Input:
s = “pineapplepenapple”
wordDict = [“apple”, “pen”, “applepen”, “pine”, “pineapple”]
Output:
[
“pine apple pen apple”,
“pineapple pen apple”,
“pine applepen apple”
]
Explanation: Note that you are allowed to reuse a dictionary word.
No.3
Input:
s = “catsandog”
wordDict = [“cats”, “dog”, “sand”, “and”, “cat”]
Output:
[]
Code
1 | private Map<String, List<String>> map = new HashMap<>(); |