{ "data": { "question": { "questionId": "140", "questionFrontendId": "140", "categoryTitle": "Algorithms", "boundTopicId": 1542, "title": "Word Break II", "titleSlug": "word-break-ii", "content": "

Given a string s and a dictionary of strings wordDict, add spaces in s to construct a sentence where each word is a valid dictionary word. Return all such possible sentences in any order.

\n\n

Note that the same word in the dictionary may be reused multiple times in the segmentation.

\n\n

 

\n

Example 1:

\n\n
\nInput: s = "catsanddog", wordDict = ["cat","cats","and","sand","dog"]\nOutput: ["cats and dog","cat sand dog"]\n
\n\n

Example 2:

\n\n
\nInput: s = "pineapplepenapple", wordDict = ["apple","pen","applepen","pine","pineapple"]\nOutput: ["pine apple pen apple","pineapple pen apple","pine applepen apple"]\nExplanation: Note that you are allowed to reuse a dictionary word.\n
\n\n

Example 3:

\n\n
\nInput: s = "catsandog", wordDict = ["cats","dog","sand","and","cat"]\nOutput: []\n
\n\n

 

\n

Constraints:

\n\n\n", "translatedTitle": "单词拆分 II", "translatedContent": "

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。

\n\n

注意:词典中的同一个单词可能在分段中被重复使用多次。

\n\n

 

\n\n

示例 1:

\n\n
\n输入:s = \"catsanddog\", wordDict = [\"cat\",\"cats\",\"and\",\"sand\",\"dog\"]\n输出:[\"cats and dog\",\"cat sand dog\"]\n
\n\n

示例 2:

\n\n
\n输入:s = \"pineapplepenapple\", wordDict = [\"apple\",\"pen\",\"applepen\",\"pine\",\"pineapple\"]\n输出:[\"pine apple pen apple\",\"pineapple pen apple\",\"pine applepen apple\"]\n解释: 注意你可以重复使用字典中的单词。\n
\n\n

示例 3:

\n\n
\n输入:s = \"catsandog\", wordDict = [\"cats\",\"dog\",\"sand\",\"and\",\"cat\"]\n输出:[]\n
\n\n

 

\n\n

提示:

\n\n

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