Adding the solutions

[subbu4061]

No description provided.

[super30admin]

Your solutions for the "Paint House" problem are comprehensive and cover multiple approaches, which is excellent. You have provided both iterative and recursive solutions with and without memoization, and you have correctly analyzed the time and space complexities for each.

Strengths:

• You have implemented efficient solutions (Solutions 1, 2, and 3) that are optimal for this problem.
• Your code is clean and well-commented, making it easy to understand.
• You have considered edge cases (like when there is only one house).

Areas for improvement:

• While Solution-4 (recursion without memoization) is correct, it is inefficient and not practical for larger inputs. It's good to show for educational purposes, but in practice, you should prefer the memoized or iterative versions.
• In Solution-3, the helper function parameters might be slightly confusing: the color parameter is the color chosen for the current house (index idx), but the function name helper is generic. Consider using more descriptive parameter names or comments to clarify.
• You have provided solutions for "Coin Change 2" in the same file, which is not related to the "Paint House" problem. It's important to separate solutions for different problems into different files or clearly distinguish them.

Overall, your solutions are correct and efficient. Keep up the good work!