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@sristi-i sristi-i commented Dec 1, 2025

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  • Strengths:

    • The student demonstrates a good understanding of the two-pointer technique and applies it correctly in maxArea and threeSum.
    • The code is clean, well-commented, and follows best practices.
    • The solutions are correct and handle edge cases appropriately.
  • Areas for Improvement:

    • For sortColors, consider using the in-place swapping method (as shown in the reference solution) to optimize the solution further. This approach reduces the number of passes over the array and is more efficient in practice.
    • Correct the time complexity comment in threeSum from O(n^2 log n) to O(n^2), as the sorting step is O(n log n) and the nested loops contribute O(n^2).
    • While the counting approach in sortColors is correct, it's worth exploring alternative methods like the Dutch National Flag algorithm for better efficiency and elegance.

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2 participants