Complete Backtracking-2

[dhruvil15]

No description provided.

[super30admin]

Subsets (Problem72.java)

Strengths:

• Clean, well-structured code with clear variable names
• Proper use of backtracking with in-place modification (more memory efficient than creating new copies)
• Correct base case handling and recursion termination
• Good practice of creating defensive copies when adding to result
• Comments explaining time and space complexity

Areas for Improvement:

• The time complexity comment "O(n × 2ⁿ) - 2ⁿ" is redundant; just state O(n × 2^n)
• Could add a brief comment explaining the backtracking strategy for clarity
• The solution is already quite optimal; no significant optimizations needed

Comparison to Reference:

• The student's solution is actually more space-efficient for the recursion stack (O(n) vs O(n^2) claimed for reference)
• Both solutions have the same time complexity
• The backtracking approach used by the student is a valid and efficient alternative to the reference's approach

VERDICT: PASS

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Palindrome Partitioning (Problem73.java)

Strengths:

• Clean, well-structured code with clear logic flow
• Proper use of backtracking with action, recursion, and backtrack steps
• Good variable naming conventions
• Correctly creates defensive copies when adding to result
• Efficient removal from ArrayList (O(1) for last element)

Areas for Improvement:

• Could precompute palindrome information using DP to avoid repeated palindrome checks, though this adds complexity
• The solution is already optimal for the given constraints (n ≤ 16)

The solution is functionally equivalent to the reference solution and demonstrates solid understanding of the backtracking pattern.

VERDICT: PASS