completed DP 1 course

[sanjoli97]

No description provided.

[super30admin]

The Coin Change (CoinChange.java)

Strengths:

• The solution correctly solves the problem using a well-thought-out dynamic programming approach
• Time complexity is excellent (O(n*m)) compared to the exponential reference solution
• Code is well-documented with clear comments explaining each step
• Good use of descriptive variable names and consistent formatting
• Proper handling of edge cases (amount = 0, unreachable amounts)

Areas for Improvement:

• Space complexity can be optimized from O(n*m) to O(m) by using a 1D DP array, which is a common optimization for this classic problem
• The comment // TC - O(n * m) and // SC - O(n * m) are accurate but could mention the potential space optimization
• Consider handling the case when amount = 0 explicitly at the start for clarity (though the current implementation handles it correctly through DP initialization)

VERDICT: PASS

---

House Robber (HouseRobber.java)

Strengths:

• Excellent use of space optimization - only O(1) space vs O(n) in the reference solution
• Clean variable naming (prev, curr, temp)
• Good comments explaining the logic
• Proper handling of edge cases (n=1 handled by initialization)
• The solution is significantly more efficient than the reference exponential solution

Areas for Improvement:

• Consider adding a check for empty array or null input for robustness (though constraints say length >= 1)
• The variable name temp could be more descriptive like prevRobbed or prevMax

The student's solution demonstrates a solid understanding of dynamic programming and optimization techniques, significantly outperforming the reference solution in both time and space complexity.

VERDICT: PASS