Solved Problem 1 - Delete and earn and Problem 2 - Minimum falling path sum

[anirudhv98]

Completed DP - 3, please review.

[super30admin]

Least Falling Path Sum (Problem1.cs)

**
The code itself is excellent for "Delete and Earn" - well-commented, efficient, and follows best practices. However, you've submitted the wrong solution entirely. This appears to be a copy-paste error or confusion about which problem you're solving. The "Least Falling Path Sum" problem requires:

• A 2D matrix input
• Dynamic programming from top to bottom
• Considering three possible moves (down, down-left, down-right)

**

VERDICT: NEEDS_IMPROVEMENT

---

Delete and Earn (Problem2.cs)

Strengths:

• The solution is well-written and follows good coding practices
• Space complexity is excellent (O(1)) - modifying input matrix in-place
• Clear handling of boundary conditions (first and last columns)
• The final minimum finding logic is correct

Areas for Improvement:

• Critical Issue: This solution solves the wrong problem. The assignment was "Delete and Earn" but the submitted code solves "Minimum Falling Path Sum"
• For the Delete and Earn problem, you would need to:
  1. Count frequencies of each number
  2. Apply a House Robber DP pattern where taking number i means you cannot take i-1 or i+1
  3. The DP recurrence would be: dp[i] = max(dp[i-1], count[i]*i + dp[i-2])

Recommendation: Please ensure you read the problem statement carefully and implement the correct algorithm. The Delete and Earn problem requires understanding the relationship between adjacent numbers and using a transformed array where each index represents the total points from that number.

VERDICT: NEEDS_IMPROVEMENT