Progress: Commited Exercise 1-4

[sneha-tambade]

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[super30admin]

1. Exercise_1.cs (Binary Search):

   • Correctness: The implementation correctly follows the binary search algorithm.
   • Time Complexity: Correctly identified as O(log n) for average and worst cases, O(1) for best case.
   • Space Complexity: Correctly identified as O(1).
   • Code Quality: Well-structured and readable. The use of l + (r - l) / 2 to prevent overflow is a good practice.
   • Improvement: Could add input validation (e.g., checking if array is null or empty).

2. Exercise_2.cs (QuickSort):

   • Correctness: The implementation correctly follows the QuickSort algorithm with proper partitioning.
   • Time Complexity: Correctly identified as O(n log n) average case.
   • Space Complexity: Correctly identified as O(log n) due to recursion stack.
   • Code Quality: Well-structured. The partition method is implemented correctly.
   • Improvement: The main method is incorrectly named (should be Main in C#). Could add comments explaining the pivot selection strategy.

3. Exercise_3.cs (Linked List Middle Element):

   • Correctness: Correctly finds the middle element using fast and slow pointers.
   • Time Complexity: Correctly identified as O(n).
   • Space Complexity: Correctly identified as O(1).
   • Code Quality: Good implementation. The fast-slow pointer approach is well implemented.
   • Improvement: The printList method prints "->" after each element which might look odd for the last element. Could format it better.

4. Exercise_4.cs (MergeSort):

   • Correctness: Correctly implements the MergeSort algorithm.
   • Time Complexity: Correctly identified as O(n log n).
   • Space Complexity: Correctly identified as O(n).
   • Code Quality: Well-structured merge and sort methods.
   • Improvement: The main method is incorrectly named (should be Main in C#). The length property should be Length in C#.

5. Exercise_5.cs (Iterative QuickSort):

   • Correctness: Incomplete implementation. Missing key parts of the algorithm.
   • Time Complexity: Not applicable (incomplete).
   • Space Complexity: Not applicable (incomplete).
   • Code Quality: Skeleton is present but needs implementation.
   • Improvement: Needs to complete the swap, partition, and QuickSort methods using a stack to remove recursion.

General Observations:

• Good job on correctly analyzing time and space complexities.
• Most implementations are correct and well-structured.
• Need to pay attention to C# naming conventions (Main vs main, Length vs length).
• Exercise 5 needs to be completed.