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140. 单词拆分 II
题目描述
给定一个字符串 s
和一个字符串字典 wordDict
,在字符串 s
中增加空格来构建一个句子,使得句子中所有的单词都在词典中。以任意顺序 返回所有这些可能的句子。
注意:词典中的同一个单词可能在分段中被重复使用多次。
示例 1:
输入:s = "catsanddog
", wordDict =["cat","cats","and","sand","dog"]
输出:["cats and dog","cat sand dog"]
示例 2:
输入:s = "pineapplepenapple", wordDict = ["apple","pen","applepen","pine","pineapple"] 输出:["pine apple pen apple","pineapple pen apple","pine applepen apple"] 解释: 注意你可以重复使用字典中的单词。
示例 3:
输入:s = "catsandog", wordDict = ["cats","dog","sand","and","cat"] 输出:[]
提示:
1 <= s.length <= 20
1 <= wordDict.length <= 1000
1 <= wordDict[i].length <= 10
s
和wordDict[i]
仅有小写英文字母组成wordDict
中所有字符串都 不同