Done Linked List 1

[RitikaC1]

No description provided.

[super30admin]

Reverse Linked List (Problem1.py)

Strengths:

• Correct implementation of the recursive reversal algorithm
• Good documentation with time/space complexity comments
• Clean separation of concerns using a helper function
• Proper handling of edge cases (empty list)

Areas for Improvement:

• The recursive approach uses O(n) stack space, while the iterative approach uses O(1). Consider implementing both as the problem's follow-up suggests
• The recursive solution could be simplified by eliminating the helper function and using default parameters, though this is a minor style preference

VERDICT: PASS

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Remove Nth Node From End of List (Problem2.py)

Strengths:

• Excellent use of the two-pointer technique, which is the optimal approach for this problem
• Properly handles edge cases using a dummy node (handles removal of head node elegantly)
• Achieves O(N) time complexity in a single pass, meeting the follow-up requirement
• Clean, readable code with descriptive variable names
• Good comments explaining the approach

Areas for Improvement:

• The commented-out code block (lines 26-28) should be removed as it's unnecessary and could be confusing
• Consider adding a brief comment explaining why we move fast n+1 steps ahead (to position slow just before the node to remove)

Minor Note:
The while loop condition while counter<=n moves fast n+1 steps, which correctly positions slow one node before the target. This is a standard technique worth noting in comments.

VERDICT: PASS

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Linked List Cycle II (Problem3.py)

Strengths:

• Correct implementation of Floyd's cycle detection algorithm
• Proper handling of edge cases (empty list, no cycle)
• Clean, readable code with good comments
• Correct time and space complexity analysis
• Follows Python best practices

Areas for Improvement:

• Minor: Could add a docstring to the method explaining the algorithm
• Minor: The flag variable is not strictly necessary (could just check if slow == fast after the loop)

Overall, this is a solid solution that correctly solves the problem with optimal time and space complexity.

VERDICT: PASS