completed LL-2

[anjanaouseph]

No description provided.

[super30admin]

Your solution for BST Iterator is excellent. It correctly implements the in-order traversal using a stack, and the methods next and hasNext are efficient. The code is clean and easy to understand.

One minor point: in the dfs method, you are using a while loop to traverse left. This is standard. However, you might consider adding comments to explain the purpose of the dfs function for clarity, but it is not necessary since the function name is descriptive.

Overall, great job!

[super30admin]

Note: The student has provided multiple solutions in one file. Focus only on the BST Iterator solution (problem52.py) for this evaluation.

Let's begin the evaluation.