Solved Problem 1 - Implement queue using stacks and Problem 2 - Design Hashmap

[anirudhv98]

Completed Design-2, please review.

[super30admin]

Create Queue using Stacks (Problem1.cs)

Your solution is correct and efficient. The approach you've taken is standard and aligns with the reference solution. Here are a few points to consider for improvement:

1. Error Handling: The problem states that all calls to pop and peek are valid, so you don't need to handle invalid operations. However, in a real-world scenario, you might want to add error handling (e.g., throwing an exception if pop or peek is called on an empty queue). Since the problem constraints guarantee valid calls, it's acceptable as is.

2. Method Naming: The Transfer method is private and well-named, but you could consider a more descriptive name like MoveInToOut to make it immediately clear what it does.

3. Consistency: The code is consistent and follows good practices. However, note that in the Pop and Peek methods, you check if outStack is empty and then call Transfer. This is efficient, but you could also consider adding a comment in the Transfer method to explain its purpose briefly, though the method name is already clear.

4. Time Complexity Explanation: You mentioned "O(n) amortized" in your comments. Actually, the amortized time complexity for each operation is O(1), while worst-case for a single operation might be O(n). It's good to clarify that.

Overall, your solution is excellent. Keep up the good work!

VERDICT: PASS

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Implement Hash Map (Problem2.cs)

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VERDICT: NEEDS_IMPROVEMENT