add design-2

[nikhylw]

No description provided.

[super30admin]

Create Queue using Stacks (queue_using_stack.py)

Strengths:

• Clean, readable implementation that matches the optimal solution
• Correct use of the two-stack queue pattern
• Good variable naming convention
• Handles edge cases (empty queue check in pop())

Areas for Improvement:

• The solution is already well-optimized; no significant improvements needed
• Minor: Could add docstrings for better documentation, though not strictly necessary for this problem

VERDICT: PASS

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Implement Hash Map (implement_hashmap.py)

Strengths:

1. Clean and readable code structure with well-named methods
2. Correctly implements the HashMap functionality with O(1) operations
3. Good use of two-level hashing to reduce collision probability
4. Handles the edge case for primaryIndex 0 (keys 0-1000 need 1001 slots)

Areas for Improvement:

1. The special case handling for primaryIndex 0 (using 1001 instead of 1000) should be documented with a comment for clarity
2. Consider adding input validation or documentation about the key range (0 to 10^6)
3. The magic number 1001 in the condition if primaryIndex == 0 could be defined as a constant for better maintainability
4. Could add docstrings to methods explaining their purpose

Comparison to Reference:

• The student's solution is conceptually similar but uses array-based chaining instead of linked lists
• Both achieve O(1) amortized time complexity
• The student's approach may have slightly better cache locality due to contiguous array access

VERDICT: PASS