done

[ShrinidhiMane]

No description provided.

[super30admin]

1. Correctness:

   • Stack implementation (Exercise_1.java) correctly handles push, pop, peek, and isEmpty operations with proper checks for overflow/underflow.
   • LinkedList implementation correctly handles insertion at the end and printing of the list.
   • StackAsLinkedList implementation correctly implements stack operations using linked list nodes.

2. Time Complexity:

   • Stack operations (push/pop/peek/isEmpty) are O(1) in all implementations.
   • LinkedList insert operation is O(n) as it traverses to the end of the list for each insertion.

3. Space Complexity:

   • All implementations use O(n) space where n is the number of elements stored.

4. Code Quality:

   • Generally good structure and readability.
   • Some areas for improvement:
     • Missing comments about time/space complexity at the top of files as requested.
     • Inconsistent indentation in some places (e.g., StackAsLinkedList.java).
     • isEmpty() in Exercise_1.java could be simplified to just return top < 0;.
     • Could add more comments explaining the logic in complex sections.

5. Efficiency:

   • The LinkedList insert could be made O(1) by maintaining a tail pointer.
   • Error messages could be more descriptive (e.g., include the value that couldn't be pushed in overflow case).

[super30admin]

The student's solution demonstrates a good understanding of basic data structures like stacks and linked lists. Here's a detailed evaluation:

1. Correctness:

• Stack implementation (Exercise_1.java) correctly handles push, pop, peek, and isEmpty operations with proper boundary checks.
• LinkedList.java correctly implements insertion at the end and printing functionality.
• StackAsLinkedList.java correctly implements stack operations using a linked list approach.

2. Time Complexity:

• Stack operations (push/pop/peek/isEmpty) in Exercise_1.java are O(1).
• LinkedList insertion is O(n) as it traverses to the end each time.
• Stack operations in StackAsLinkedList.java are O(1).

3. Space Complexity:

• All implementations use O(n) space where n is the number of elements.

4. Code Quality:
   Strengths:

• Proper use of comments to explain code sections.
• Good variable naming.
• Correct handling of edge cases (empty stack/list conditions).

Areas for Improvement:

• Missing time/space complexity comments at the top of each file as requested.
• In Stack.java, isEmpty() could be simplified to return top < 0;.
• In LinkedList.java, the insert method could be made more efficient by maintaining a tail pointer.
• Some inconsistent formatting (spacing around operators, braces).
• Could add more test cases to verify edge conditions.

5. Efficiency:

• The LinkedList implementation could be optimized by maintaining a tail pointer to make insertions O(1).
• The stack implementations are already efficient for their respective approaches.