Completed Design 1 course

[sanjoli97]

No description provided.

[super30admin]

Implement Hash Set (MyHashSet.java)

Strengths:

• Clean, well-documented code with clear comments explaining the double hashing approach
• Correct handling of the special case for bucket 0 (needs bucketItem + 1 size)
• Proper null checks before accessing secondary arrays in remove() and contains()
• Good variable naming that makes the code readable
• Time complexity matches the reference solution at O(1) for all operations

Areas for Improvement:

• The comment mentions "push, pop, peek, getMin" which are stack operations, not relevant to a HashSet. This should be corrected to reflect the actual methods (add, remove, contains).
• Could consider making bucket and bucketItem constants (final) since they don't change after initialization.
• The solution is functionally equivalent to the reference but could benefit from more explicit documentation about why the special case for bucket 0 exists.

VERDICT: PASS

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Implement Min Stack (MinStack.java)

Strengths:

• The single-stack approach is more space-efficient than the two-stack reference solution (only one Stack object vs two)
• Excellent documentation with comments explaining the algorithm
• Clean and readable code structure
• Correctly handles edge cases (val <= min handles equal values properly)

Areas for Improvement:

• The solution is functionally correct and efficient. One minor observation: the implementation could benefit from a separate main stack for data storage (like the reference solution) to make the code's intent clearer, though the current approach is equally valid.
• The comments mention "peek" but the method is called "top" - minor inconsistency but doesn't affect functionality.

Overall Assessment:
This is a solid implementation that correctly solves the problem with O(1) time complexity for all operations. The single-stack optimization is actually more space-efficient than the reference solution while maintaining the same time complexity.

VERDICT: PASS