Done

[nagasai67]

No description provided.

[super30admin]

Strengths:

• The HashSet solution correctly implements the required operations using chaining with linked lists.
• The code is clean and well-commented.
• The use of dummy nodes simplifies the linked list operations.

Areas for Improvement:

• Consider using a dynamic array size (e.g., a prime number) and possibly resizing to maintain a good load factor. However, given the constraints (keys up to 10^6 and at most 10,000 operations), the current size is acceptable.
• The memory usage could be optimized by using a more compact representation. For example, the double hashing method (as in the reference solution) uses less memory because it uses a boolean array instead of linked list nodes.
• In the add method, you are checking for duplicates by traversing the entire list. This is correct, but note that the reference solution does not need to check because it directly sets a boolean value. However, in your approach, the check is necessary to avoid duplicates in the linked list. So it is correct.
• The dummy nodes are initialized with key=0. This is not harmful because you never use the key of the dummy node. But to avoid confusion, you might use a dummy node without a key (or with a sentinel value) if possible. However, in Python, it's fine as is.

Overall, the solution is correct and efficient enough for the problem constraints.