Done

[PurvaT-11]

No description provided.

[super30admin]

For problem1.py:

• Strengths: The solution correctly uses BFS with a deque and maintains the level order traversal structure. The comments are clear and helpful.
• Areas for Improvement: The main issue is not checking for null nodes before appending them to the queue. This can lead to null values being added to the level list, which is incorrect. The solution should check if the node is not null before appending its children to the queue.

For problem2.py:

• Strengths: The solution correctly implements DFS to detect cycles in a graph. The use of a visit list with three states (0, 1, 2) is a good approach to track the exploration status of nodes. The comments are clear and the code is well-structured.
• Areas for Improvement: The solution could benefit from a brief explanation of the three states (0: unvisited, 1: visiting, 2: visited) in the comments for better clarity.