minstack + hashset

[sudheerkreddy]

No description provided.

[super30admin]

Implement Hash Set (HashSet.java)

Strengths:

1. Correct implementation of the two-level hashing HashSet design
2. Good understanding of when to use lazy initialization for memory efficiency
3. Clean code structure with appropriate comments
4. Handles edge cases properly (bucket 0 special handling for max key value)

Areas for Improvement:

1. The comment at the top mentions "push, min and peek" which appears to be copied from a different problem (likely a stack/min-heap problem). These should be "add, remove, and contains" to match the actual implementation.
2. Variable naming could be more consistent - the reference uses "primaryBuckets/secondaryBuckets" while student uses "buckets/bucketItems". Both are acceptable, but consistency matters.
3. In the contains method, the variable name bucketSize is misleading - it should be bucketItem to match the naming convention used in other methods.

Overall, this is a solid implementation that correctly solves the problem with optimal time complexity.

VERDICT: PASS

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Implement Min Stack (MinQueue.java)

Strengths:

• Clean and well-documented code with time/space complexity comments
• Correct use of two-stack approach to achieve O(1) minimum retrieval
• Proper initialization with Integer.MAX_VALUE
• Consistent use of minStack.peek() in getMin() method
• Good variable naming and code organization

Areas for Improvement:

• The solution is functionally equivalent to the reference and doesn't have significant issues
• Could consider adding input validation (though not required by problem constraints)
• The comments are helpful but could be more detailed for educational purposes

VERDICT: PASS