juniorTrie
What is the space complexity of a Trie?
Updated Apr 28, 2026
Short answer
O(Alphabet_Size L N), which can be large if there are few common prefixes.
Deep explanation
Detailed theoretical explanation of What is the space complexity of a Trie?. A Trie (retrieval tree) stores keys in a path from root to leaf. It is highly efficient for prefix-based queries.
Real-world example
Dictionary apps or spell checkers.
Common mistakes
- Forgetting to mark the 'isEndOfWord' flag, resulting in failed searches for complete words.
Follow-up questions
- Can a Trie store integers?