Completed Design 1

[Sanket-S-Kale]

No description provided.

[super30admin]

Implement Hash Set (Problem1.py)

Strengths:

• Clean, readable code with good comments explaining the approach
• Correctly handles edge cases (duplicate adds, removing non-existent keys)
• Uses appropriate data structure (list of lists) for chaining
• Good variable naming and code organization

Areas for Improvement:

• The remove and contains operations have O(n) time complexity due to linear search within buckets. Consider using a two-level array approach like the reference solution to achieve O(1) for all operations.
• For contains, you could optimize by storing keys in a set within each bucket for O(1) lookup, but this would increase space complexity.
• The current approach with lists is simpler but less efficient for lookups compared to the boolean array approach.

Alternative Optimization:
You could maintain a separate boolean array alongside your list of lists to achieve O(1) contains, similar to how the reference solution works. This would trade some space for better time complexity.

VERDICT: PASS

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Implement Min Stack (Problem2.py)

Strengths:

• Excellent understanding of the problem - correctly identified the need for a parallel minStack
• Clear, well-documented code with comments explaining the logic
• Good variable naming (stack, minStack)
• Correctly handles the initial push case when minStack is empty
• Follows the optimal O(1) approach for all operations

Areas for Improvement:

• The top() method has an unnecessary if check - per problem constraints, the stack will never be empty when top() is called
• Could simplify top() to just return self.stack[-1]
• Consider adding type hints for better code documentation (e.g., def push(self, val: int) -> None:)

Minor Optimizations:

• The solution is already optimal; no significant optimizations needed
• The two-array approach is the standard and most efficient solution for this problem

Overall, this is a solid implementation that demonstrates good problem-solving skills and understanding of stack mechanics.

VERDICT: PASS