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@subbaparitala9
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@super30admin
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Strengths:

  • The student demonstrates understanding of both double hashing and chaining approaches.
  • The MinStack implementation is correct and efficient.
  • The code is generally readable with appropriate method and variable names.

Areas for Improvement:

  • The 2D array implementation should handle the edge case for key 1,000,000 by checking if h1 is 0 and adjusting the secondary array size accordingly.
  • The linked list implementation has redundant checks (e.g., checking if prev.next is None twice in contains and remove).
  • Consider using lazy initialization for the 2D array to save space.
  • Add more comments to explain the design choices and edge cases.
  • The MinStack implementation could handle the case where the stack is empty in top() and getMin() by raising an exception instead of returning None.

@super30admin
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Strengths:

  • The student demonstrates understanding of both double hashing and chaining approaches.
  • The code is generally well-structured and readable.
  • The time complexity matches the optimal solution.

Areas for Improvement:

  • The first implementation should handle the edge case for key=1,000,000 by using lazy initialization and adjusting bucket sizes like the reference solution.
  • The second implementation could be simplified by removing redundant checks (e.g., checking if prev.next is None multiple times).
  • Consider adding more comments to explain the design choices and edge cases.
  • The first implementation wastes space by pre-allocating a large 2D array. Use lazy initialization instead.

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2 participants