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Solution: Word Break II

Explore a dynamic programming method to solve the Word Break II problem by segmenting a string into valid dictionary words. Understand the naive recursive approach, its limitations, and how to optimize it using bottom-up tabulation. Learn how to store and combine sentences for prefixes to generate all valid word sequences efficiently, mastering both time and space tradeoffs.

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 ...