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Solution: Word Break II

Explore how to solve the Word Break II problem by applying dynamic programming techniques. Learn to build and use a lookup table to efficiently generate all valid sentences from a string using a given dictionary, reducing redundant computations and improving performance over naive recursion. Understand time and space complexity tradeoffs for this approach.

Statement

You are given a string, s, and an array of strings, wordDict, representing a dictionary. Your task is to add spaces to s to break it up into a sequence of valid words from wordDict. We are required to return an array of all possible sequences of words (sentences). The order in which the sentences are listed is not significant.

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

Constraints:

  • 11 \leq s.length 20\leq 20 ...