DP-1 complete

[KartavyaBhatt]

No description provided.

[super30admin]

Coin Change (Problem1.py)

Strengths:

1. Excellent understanding of the problem - recognized the need to transition from brute force to dynamic programming
2. Well-documented code with clear comments explaining both the problem analysis and solution approach
3. The DP solution is correct and handles all edge cases properly
4. Significantly better time complexity compared to the reference exponential solution

Areas for Improvement:

1. Use float('inf') instead of 99999 for representing infinity - this is more Pythonic and clearly communicates intent
2. The inner loop could be optimized from for i in range(amount+1) to for i in range(coin, amount+1) since values less than coin cannot be updated by that coin
3. Consider adding type hints for better code documentation

The solution demonstrates strong problem-solving skills and a good grasp of dynamic programming concepts.

VERDICT: PASS

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House Robber (Problem2.py)

Strengths:

1. Excellent time complexity: O(n) compared to O(2^n) in the reference solution - a significant improvement
2. Optimal space complexity: O(1) compared to O(n) in the reference solution
3. Clean, concise code: The implementation is elegant and easy to follow
4. Good documentation: The comments explain the reasoning behind the DP approach
5. Correct logic: The two-state DP approach accurately captures the problem constraints

Areas for Improvement:

1. Variable naming: dp[0] and dp[1] could be more descriptive. Consider naming like prev_no_rob and prev_rob to clarify what each state represents
2. The comment "creates a tree with these 2 branches" is slightly misleading - while true for the recursive approach, this solution avoids the tree entirely using DP
3. Type hints: Adding from typing import List and proper type hints would improve code clarity

The solution demonstrates a strong understanding of dynamic programming and successfully optimizes both time and space compared to the reference recursive solution.

VERDICT: PASS