Completed Trees-3

[ManasviReddy25]

No description provided.

[super30admin]

Path Sum II (Problem1.py)

Strengths:

• Well-documented code with clear explanations of the algorithm and approach
• Correct implementation of backtracking pattern
• Proper use of list(path) to create a copy when saving results
• Clean separation of concerns with a helper method
• Good variable naming and code organization

Areas for Improvement:

• The time complexity analysis in the comment is slightly optimistic. The worst-case O(n²) should be acknowledged for skewed trees where each path copy takes O(n) time.
• Consider using type hints for better code documentation (e.g., Optional[TreeNode] is already used, could add more).

Minor Suggestion: The solution could benefit from early termination if currSum exceeds targetSum for positive values, but since node values can be negative (constraint: -1000 <= Node.val <= 1000), this optimization wouldn't be valid for this problem.

VERDICT: PASS

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Symmetric Tree (Problem2.py)

This is a high-quality solution that demonstrates strong understanding of the problem. The recursive approach is elegantly implemented with clear cross-pairing logic. The comments are particularly helpful and show good programming practice.

One minor suggestion: The solution could also mention the worst-case space complexity (O(n) for skewed trees) in the comment for completeness, since the height h could equal n in pathological cases.

VERDICT: PASS