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Quick Summary
Implement a multithreaded crawler that explores pages starting from a given URL.
Filter discovered links to only include those sharing the exact same hostname as the start page.
Sanitize all URLs by removing fragment identifiers before deduplication and hostname comparison.
What This Tests
Thread-safe shared state management and race condition prevention
Parallel graph traversal with dynamic work distribution
String manipulation and URL parsing logic
Synchronization primitives for coordinating async tasks
Common Patterns
Graph Traversal
DFS/BFS
Hashing
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