DP-3

[joshyoon92]

No description provided.

[super30admin]

Least Falling Path Sum (MinimumFallingPathSum.java)

Strengths:

• Correctly implements the dynamic programming approach with proper state transitions
• Handles edge cases (first and last columns) correctly
• Clean and readable code structure
• Significantly better time complexity than the recursive reference solution
• Proper use of Math.min() for finding minimum values

Areas for Improvement:

• Space optimization: The DP table could be reduced to O(n) space by using only two rows instead of the full matrix
• Unnecessary array size: The dp array is created with [m+1][n+1] but only [0..m-1][0..n-1] is used; consider using [m][n] instead
• Could add early return for edge cases like empty or null matrix (though constraints guarantee valid input)

VERDICT: PASS

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Delete and Earn (DeleteEarn.java)

Strengths:

• Correctly implements the core dynamic programming logic
• Space-efficient approach using only two variables instead of a full dp array
• Clean code structure with good variable naming
• Handles edge cases appropriately

Areas for Improvement:

• Add comments to explain the transformation and DP logic for better readability
• Consider adding a bounds check for arr[1] when max == 0 (though not needed given constraints)
• The variable name "curr" could be more descriptive like "include" or "take"

The solution is functionally correct and efficient. It's a solid implementation that matches the reference solution's approach while being slightly more space-efficient.

VERDICT: PASS