Package g0101_0200.s0140_word_break_ii

Class Solution

  • public class Solution
extends Object
    140 - Word Break II.

    Hard

    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.

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

    Example 1:

    Input: s = “catsanddog”, wordDict = [“cat”,“cats”,“and”,“sand”,“dog”]

    Output: [“cats and dog”,“cat sand dog”]

    Example 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.

    Example 3:

    Input: s = “catsandog”, wordDict = [“cats”,“dog”,“sand”,“and”,“cat”]

    Output: []

    Constraints:

    • 1 <= s.length <= 20
    • 1 <= wordDict.length <= 1000
    • 1 <= wordDict[i].length <= 10
    • s and wordDict[i] consist of only lowercase English letters.
    • All the strings of wordDict are unique.