Completed S30 DP-1

[prenastro]

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[super30admin]

Coin Change (coinchange.py)

Strengths:

• Clean, readable implementation of bottom-up DP
• Correct use of amount + 1 as infinity sentinel value
• Proper handling of edge cases (amount = 0 returns 0, impossible cases return -1)
• Good variable naming convention

Areas for Improvement:

• The time complexity comment is incorrect - it should be O(A * N), not O(A+N)
• Remove the debug comment line dp = [0,1,1,2,2,1,2,2,3,3,2,3]
• Consider adding a brief docstring explaining the DP approach

VERDICT: PASS

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House Robber (houserobber.py)

Strengths:

• Excellent understanding of dynamic programming and space optimization
• The space-optimized approach using two pointers is a great optimization technique
• Clean and readable code structure
• Correctly identifies both time and space complexity in comments

Areas for Improvement:

• The dp array is declared but never used, which is dead code. Either remove it or implement the full DP array version
• Consider adding a brief comment explaining the logic of the two-pointer approach for future readers

Minor Note:
The solution handles edge cases correctly (n==1 returns nums[0]), which is important for robustness.

VERDICT: PASS