Build a Trie / Autocomplete
Build a trie (prefix tree) with insert, search, prefix queries, deletion, radix compression, top-K autocomplete, and fuzzy search. Used in IDE autocomplete, browser address bars, IP routing, and spell checkers.
beginner8 lessons4 chapters8 graded exercisesPython
No sign-up needed for lesson 1 · certificate on completion · sign up to save progress
What you’ll have built
Chapter by chapter. Every step is a graded exercise.
- Building the Trie
- Search & Prefix
- Compression
- Autocomplete
Starts in Python — solve in the language you choose in the editor, same tests either way.
Curriculum
4 chapters, 8 lessons. Each lesson is a short read, one graded exercise, and a quiz.
- 1Trie: A Prefix TreeRead · exercise · quiz
- 2Node StructureRead · exercise · quiz
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