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Leetcode 140. Word Break II

Given a string s and a word dictionary, return all possible sentences formed by inserting spaces so every token is a dictionary word — i.e., enumerate all valid segmentations. The challenge is to generate all combinations efficiently by exploring prefixes and using memoization/DP to avoid exponential rework and prune impossible splits.

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Late October, 2025

Bloomberg

Junior

Early February, 2025

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