Create Queue using Stacks (MyQueue.java)

Strengths:

1. Excellent documentation with time/space complexity noted upfront
2. Clear explanation in comments about how the two-stack approach works
3. Clean, readable code with meaningful variable names
4. Correct implementation of the amortized O(1) pattern
5. Good handling of edge cases (empty stacks)

Areas for Improvement:

1. The empty() method could be slightly more concise: return in.isEmpty() && out.isEmpty();
2. Consider adding a comment explaining why peek() is called in pop() before the actual pop operation
3. The Leetcode-specific comment ("Did this code successfully run on Leetcode") is not necessary for production code

The solution is functionally correct and follows good practices. It matches the reference solution's approach and complexity.

VERDICT: PASS

Implement Hash Map (MyHashMap.java)

Strengths:

1. Clean and well-structured code with good comments
2. Correct use of a dummy head node to simplify edge case handling
3. Good separation of concerns with helper methods (hash, search)
4. Follows the same efficient approach as the reference solution
5. Handles all edge cases properly

Areas for Improvement:

1. Variable naming: "val" could be more descriptive as "value" for consistency
2. The search method could be slightly optimized by checking if head is null at the start
3. Consider adding null checks at the beginning of get() and remove() for the storage array

Minor Note:
The solution is functionally equivalent to the reference solution and performs well. The implementation is correct and efficient.

VERDICT: PASS