Complete

[Srijha-Kalyan]

No description provided.

[super30admin]

The student has provided solutions for three different exercises involving stack and linked list implementations. Here's a detailed evaluation:

1. Correctness:

• Exercise_1.py: The stack implementation using a Python list is correct and handles all basic operations (push, pop, peek, etc.) properly.
• Exercise_2.py: The linked list implementation of a stack is mostly correct, though it could benefit from handling edge cases like popping from an empty stack more gracefully.
• Exercise_3.py: The singly linked list implementation is correct with proper append, find, and remove operations.

2. Time Complexity:

• The student has correctly identified and documented the time complexities for all operations in each implementation.
• For Exercise_3.py, the student could have documented the time complexities in the code comments as done in the other exercises.

3. Space Complexity:

• The space complexity analysis is accurate for all implementations.
• The student correctly notes that space complexity is O(n) where n is the number of elements.

4. Code Quality:

• The code is generally well-structured and readable.
• Good use of docstrings to explain each method's purpose.
• Consistent naming conventions and proper indentation.
• In Exercise_3.py, the ListNode class has an unused next parameter in init which could be removed.
• The display() method in Exercise_3.py could be renamed to something more descriptive like to_list().

5. Efficiency:

• All implementations are efficient for their respective operations.
• No major optimizations needed, though the linked list implementations could benefit from maintaining a tail pointer for O(1) append operations.

Areas for Improvement:

• Add more edge case handling, especially for empty stack/list scenarios.
• Consider adding type hints for better code documentation.
• In Exercise_2.py, the pop operation could raise an exception when the stack is empty rather than returning None.
• The show() method in Exercise_1.py could be renamed to to_list() for better clarity.