Update sample.java, implement Hashset code

[Siva512]

No description provided.

[super30admin]

Design HashSet (Sample.java)

Strengths:

• Correct implementation of separate chaining technique
• Good use of comments explaining the approach
• Proper handling of the remove method by casting to Integer to avoid removing by index
• Clean, readable code structure

Areas for Improvement:

1. Bucket Size: Consider using a prime number for SIZE (e.g., 769 or 1009) to reduce collisions and improve hash distribution
2. Lazy Initialization: Instead of pre-allocating all 420 LinkedLists, consider lazy initialization - only create a LinkedList when a key is first added to that bucket. This saves significant memory.
3. Worst-case Performance: The current approach has O(n) worst-case time complexity. Consider the double hashing approach used in the reference solution for guaranteed O(1) operations.
4. Load Factor: Consider implementing dynamic resizing when the load factor exceeds a threshold (e.g., 0.75) to maintain performance.

VERDICT: PASS

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VERDICT_REASON: [Brief reason for verdict]

ESTIMATED_GRADE: [A/B/C/D/F]

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VERDICT: NEEDS_IMPROVEMENT