Completed Arrays 1

[sanjoli97]

No description provided.

[super30admin]

Product Except Self (ProductOfArrayExceptSelf.java)

Strengths:

• Excellent implementation of the optimal O(n) two-pass algorithm
• Well-documented code with clear comments explaining the logic
• Correctly handles the base case (product[0] = 1)
• Clean and readable code structure
• Achieves the O(1) space complexity requirement (excluding output array)

Areas for Improvement:

• The comment mentions "runningSum" but the variable is actually "runningProduct" - minor inconsistency
• Could add a brief explanation of why this approach works without division
• Consider adding input validation for edge cases (though not strictly necessary given constraints)

Minor Note: The solution correctly handles the case where nums[i] = 0 (as shown in Example 2), since it doesn't use division.

VERDICT: PASS

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Diagonal Traverse (DiagonalTraverse.java)

Strengths:

• The solution correctly implements the diagonal traversal algorithm
• Good use of comments that explain the logic at each step
• Clean and readable code structure
• Proper handling of all boundary conditions (corners, edges, etc.)
• Time complexity is optimal at O(m*n)

Areas for Improvement:

• Variable naming convention: Using n for rows and m for columns is unconventional. Most developers expect m to represent rows and n to represent columns (as the reference solution does). Consider renaming for clarity and consistency with common conventions.
• The comments are helpful but could be slightly more concise in places.

VERDICT: PASS

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Spiral Matrix (SpiralMatrix.java)

Strengths:

• Clean implementation that matches the reference solution in both logic and efficiency
• Excellent comments explaining the algorithm and each step
• Proper handling of edge cases (single row/column matrices) with conditional checks
• Good variable naming convention
• Clear termination condition

Areas for Improvement:

• The solution is already well-optimized. Minor observation: the comment says "print left row" but it should say "print left column" for accuracy.
• Consider adding a brief explanation of what happens with odd vs even dimension matrices to make the comments more comprehensive.

VERDICT: PASS