Solved Problem 1 - Coin Change and Problem 2 - House Robber

[anirudhv98]

Completed DP-1, please review

[super30admin]

The Coin Change (Problem1.cs)

Strengths:

• Excellent use of 1D DP array instead of 2D, demonstrating deeper understanding of space optimization
• Clear and informative comments at the top explaining complexity
• Proper handling of edge cases (amount = 0 would work correctly since the loop won't execute and dp[0] = 0)
• Clean, readable code with good variable naming

Areas for Improvement:

• The rows variable is calculated but not really needed since it's only used as a loop bound; you could simply use coins.Length directly in the loop condition
• Consider adding a check for amount == 0 at the start for clarity (though the current code handles it correctly)

Overall, this is a solid, well-optimized solution that demonstrates good understanding of dynamic programming concepts.

VERDICT: PASS

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House Robber (Problem2.cs)

Strengths:

• Excellent use of dynamic programming to achieve O(n) time complexity
• Clean in-place modification approach with O(1) space
• Proper handling of array bounds with ternary operators
• Well-structured and readable code

Areas for Improvement:

• The comment contains a typo/error: "where m is the total length" should be consistent (use n or clarify)
• Consider adding a brief comment explaining the DP logic for future maintainability
• The solution modifies the input array, which could be noted in comments since this is an in-place algorithm

Overall Assessment:
This is a solid, efficient solution that demonstrates good understanding of dynamic programming. The approach is optimal for this problem.

VERDICT: PASS