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🔥Word Break: Dictionary Segmentability DPMedium
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MediumDynamic Programming•Acceptance: 46.2%

Word Break: Dictionary Segmentability DP

Targeted in FAANG & Tech OA:AmazonGoogleMeta
Real-World Engineering Context
Used in NLP tokenization (Chinese/Japanese text segmentation without spaces), search query keyword splitting, and URL slug parser segmenters.
Given a string `s` and a dictionary of strings `wordDict`, return `true` if `s` can be segmented into a space-separated sequence of one or more dictionary words. Note that the same word in the dictionary may be reused multiple times in the segmentation.

Sample Test Cases

Input: ["leetcode",["leet","code"]]
Expected: true
Input: ["applepenapple",["apple","pen"]]
Expected: true
Input: ["catsandog",["cats","dog","sand","and","cat"]]
Expected: false

Constraints

  • 1 <= s.length <= 300
  • 1 <= wordDict.length <= 1000
  • 1 <= wordDict[i].length <= 20
  • s and wordDict[i] consist of only lowercase English letters.
  • All the strings of wordDict are unique.
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