@DaleStudy

Great job on submitting multiple solutions across different problems! Your code is clear, well-commented, and demonstrates good understanding of the algorithms. Here are some constructive suggestions to further improve your work:

1. Time and Space Complexity Annotations:
   You’ve added complexity comments in some solutions, which is excellent. For consistency, consider including them across all solutions, especially in the rob problem. For example, the rob function has a nested loop that could be optimized; explicitly stating the overall TC and SC would help reviewers grasp your thought process.

2. Algorithmic Improvements:

   • In the rob solution, your current implementation considers only i-2 and i-3. A more standard approach uses dynamic programming with maxSum[i] = Math.max(maxSum[i-1], maxSum[i-2] + nums[i]). This simplifies the logic and ensures correctness, especially for larger inputs.
   • For the longestConsecutive problem, your approach is good, but it could be optimized further by only expanding sequences from the start points (numbers without a predecessor). You’ve done this, which is great, but emphasizing that it achieves O(N) time due to avoiding repeated work would be helpful.

3. Code Readability & Style:

   • Consistent indentation and spacing are maintained well.
   • In the topKFrequent solutions, the variable naming is clear, but adding brief comments about the bucket sort approach can make it even more accessible.

4. Additional Tips:

   • Consider handling edge cases explicitly, such as empty arrays or small input sizes, even if they are implicitly covered.
   • For the twoSum problem, you might optimize by constructing the map on-the-fly in a single pass, reducing the total time complexity to O(n) without two separate loops.

Overall, your solutions are solid, and with some refinements, they can be even more efficient and easier to follow. Keep up the excellent work — your understanding of these algorithms is evident, and your consistent commenting shows good coding practices.