dp-1 commit

[joshyoon92]

No description provided.

[super30admin]

The Coin Change (CoinChange.java)

Strengths:

• Excellent choice of dynamic programming over the exponential recursive approach
• Clean initialization with sentinel value
• Correct handling of edge cases (amount=0, impossible cases)
• Good variable naming and logical structure

Areas for Improvement:

• Remove the redundant if (coins[i-1] > j){ dp[j] = dp[j]; } line - the else branch handles this implicitly
• Remove the unused generic type <T> from the class declaration
• Consider adding comments explaining the DP approach for clarity
• Could add a main method or test cases to demonstrate usage

The solution demonstrates solid understanding of the coin change problem and correctly implements an efficient DP solution.

VERDICT: PASS

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House Robber (HouseRobber.java)

Strengths:

• Excellent optimization from O(n) space to O(1) space while maintaining O(n) time
• Clean and readable code with meaningful variable names
• Proper handling of edge cases (empty array would need handling, but constraints guarantee length >= 1)
• Good use of comments documenting complexity
• Shows understanding of multiple approaches (evidenced by commented code)

Areas for Improvement:

• Consider adding handling for nums.length == 2 case to avoid potential index issues, though current code handles it correctly
• The variable name temp could be more descriptive like prevPrev or prev2
• Could add a brief comment explaining the DP logic for future maintainability

Minor Suggestions:

• The solution could benefit from early validation for edge cases, though the current approach is correct
• Consider using Math.max() more explicitly in comments to document the recurrence relation

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

VERDICT: PASS