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Quick Summary
Model a hierarchical file system using Teams, Folders, and Files as nodes in a forest.
Track direct user permissions that automatically inherit to all descendant entities.
Return the minimal set of ancestor nodes that grant a user complete access coverage.
What This Tests
Tree and graph data structure modeling
Depth-first search traversal
Subtree pruning and greedy selection
Efficient hierarchical query processing
Common Patterns
DFS/BFS
Graph Traversal
Hashing
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Accepted
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/155
Acceptance Rate
61.3%
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Python3
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