Completed Two-Pointers-2

[Sanket-S-Kale]

No description provided.

[super30admin]

Merging of 2 arrays (Problem1.py)

Strengths:

• The code is clean, well-commented, and follows good coding practices
• The two-pointer approach is correctly implemented for duplicate removal
• Edge cases are handled appropriately
• Variable naming is clear and descriptive

Critical Weaknesses:

• Wrong problem entirely: The solution solves "Remove Duplicates from Sorted Array II" instead of the assigned "Merge Sorted Array" problem
• This is a fundamental misunderstanding of the problem requirements
• The solution would fail any test case for the merge problem

Recommendations:

1. Carefully read the problem statement before starting to code
2. Verify the problem URL matches the expected problem
3. For the merge problem, use a three-pointer approach starting from the end of nums1 to merge elements in-place without overwriting unused elements

VERDICT: NEEDS_IMPROVEMENT

---

Search 2D sorted matrix II (Problem2.py)

• Critical Issue: You submitted a solution for the wrong problem. The problem asked you to search for a target in a 2D sorted matrix, but your code merges two sorted arrays.
• Strengths: Your code for Merge Sorted Array is well-structured with excellent documentation explaining the three-pointer approach.
• What to do: For the Search 2D sorted matrix II problem, consider starting from the top-right corner (or bottom-left) and eliminate rows/columns based on comparisons with the target - this gives O(m+n) time complexity which is optimal for this problem.

VERDICT: NEEDS_IMPROVEMENT

---

Edit and Remove Duplicates in an array (Problem3.py)

• Wrong Problem: The submitted solution solves a completely different problem than the one specified. The reference solution is for removing duplicates from an array (appearing at most twice), but the student submitted code for searching in a 2D matrix.
• Documentation Quality: The student's solution has excellent documentation with clear time/space complexity analysis and helpful comments explaining the algorithm's logic.
• Code Structure: The code is well-structured with clear variable naming and logical flow.
• Correctness for Wrong Problem: If evaluated against the 2D matrix search problem, the solution is correct and efficient.

Recommendation: The student needs to submit the correct solution for the "Remove Duplicates II" problem. Their coding skills appear solid based on the submitted work, but they need to ensure they're solving the right problem.

VERDICT: NEEDS_IMPROVEMENT