Completed PreCourse 2

[restacksyj]

No description provided.

[super30admin]

The student's solution appears to implement several common algorithms and data structures correctly:

1. Binary Search (Exercise_1.cpp):

   • Correctly implements iterative binary search with O(log n) time complexity and O(1) space
   • Good use of mid calculation to avoid overflow (l + (r - l)/2)
   • Clear and concise implementation

2. QuickSort (Exercise_2.cpp and Exercise_5.cpp):

   • Correct recursive and iterative implementations
   • Proper partitioning logic with pivot selection
   • Correct time complexity of O(n log n) average case
   • Space complexity correctly noted (O(log n) for recursive, O(1) for iterative)

3. Linked List Middle Node (Exercise_3.cpp):

   • Correct fast/slow pointer approach
   • O(n) time and O(1) space complexity
   • Clean implementation

4. Merge Sort (Exercise_4.cpp):

   • Correct divide-and-conquer implementation
   • Proper merging logic
   • Correct O(n log n) time complexity
   • Space complexity correctly noted as O(n)

Strengths:

• Good code organization with separate files for each exercise
• Clear comments explaining time/space complexity
• Correct implementation of standard algorithms
• Proper handling of edge cases (empty arrays, single element cases)

Areas for Improvement:

• The swap function in Exercise_2.cpp is incorrect (swaps pointers instead of values)
• Could benefit from more descriptive variable names in some places
• Missing some error handling (e.g., null checks for linked list)
• Could add more test cases to verify edge cases
• The a.out file appears to be included accidentally and should be removed