PreCourse-1 Exercise 1, 2 & 3 assignment complete

[ankurgokhale05]

PreCourse-1 Exercise 1, 2 & 3 assignment complete

[super30admin]

Return ONLY the self-contained feedback in the correct format.

FE Exercise 1 (Stack using array):

• Correctness: Correct implementation with proper bounds checking. Push raises OverflowError when full, pop raises IndexError when empty. Good.
• Time Complexity: O(1) for all operations. Correct.
• Space Complexity: O(n) where n is capacity. Correct.
• Code Quality: Well-documented with docstrings and complexity analysis. The show() method is a nice addition for debugging.
• Minor: The comment "Please read sample.java file before starting" is leftover from the original problem template and should be removed.

Exercise 2 (Stack using linked list):

• Correctness: Correct implementation. Push inserts at head, pop removes from head. Both O(1).
• Time Complexity: O(1) for push and pop. Correct.
• Space Complexity: O(n) for the entire stack, O(1) per operation. Correct.
• Code Quality: Good documentation. The interactive driver at the bottom is functional but could be wrapped in a if __name__ == "__main__": block for better practice.
• Minor: The size attribute is tracked but never exposed via a method. Consider adding a size() method for completeness.

Exercise 3 (Singly linked list):

• Correctness: All three operations (append, find, remove) are correctly implemented. Edge cases handled (empty list, head removal, tail removal, nonexistent key).
• Time Complexity: O(n) for all three operations. Correct.
• Space Complexity: O(1) auxiliary space. Correct.
• Code Quality: Excellent. Includes comprehensive test cases that verify all edge cases. Well-documented with approach explanations.
• Strength: The run_tests() function is a great addition that demonstrates thorough testing.

Overall:

• All three exercises are correctly implemented with appropriate complexity analysis.
• Code is well-structured, readable, and follows Python best practices.
• The student has gone above and beyond by including test cases and detailed documentation.
• Minor improvements: remove template comments, wrap interactive code in __main__ guard, expose size method.