Replace Words
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What is Replace Words?
Given a dictionary of root words and a sentence, replace each word in the sentence with its shortest matching root from the dictionary. You insert all roots into a trie, then for each word in the sentence traverse the trie character by character until you hit a root or fail. This problem teaches you practical trie lookup with early termination, which is the core of trie efficiency.
Free resources to learn Replace Words
More in stage 13: Tries
Replace Words: common questions
Can I learn Replace Words in Hindi?
This lesson is written in English. Once you sign in, open it in the interactive course and ask the AI tutor to explain Replace Words in Hindi or Hinglish. The tutor answers from this lesson’s own text, so it stays on the syllabus, and it runs on your own Google, OpenAI or Anthropic key.
Is this Replace Words tutorial for beginners?
It is lesson 80 of 137 in the free LeetCode roadmap, in stage 13, Tries. If you are new to LeetCode, start from stage 1 and come back here in order; if you already know the earlier stages, this lesson stands on its own.