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Design a hierarchical key-value store that organizes data using directory-style paths.
Implement CRUD operations including creation, update, retrieval, and leaf-only deletion.
Ensure efficient navigation and state management across a nested path structure.
What This Tests
Tree-based data structure design and traversal
String tokenization and hierarchical mapping
Edge case handling for nested state mutations
Time and space complexity optimization for recursive structures
Common Patterns
Trie
Hashing
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