Coin change 2. Paint houses

[paridhimalviya]

Problem1(https://leetcode.com/problems/paint-house/)

Problem2 (https://leetcode.com/problems/coin-change-2/)

[super30admin]

Strengths:

• The student has implemented multiple approaches to solve the problem, demonstrating a good understanding of different techniques.
• The code is well-commented and organized, making it easy to follow.
• The use of DP tabulation and memoization shows a strong grasp of dynamic programming concepts.

Areas for Improvement:

• In the memoization function, the student recalculates the costs array, which is unnecessary and could be avoided by passing it as a parameter.
• The helper function in the memoization approach calls the non-memoized helper function, which could lead to inefficiencies. It should call the memoized version instead.
• The comments and variable names are good, but some additional comments explaining the transition from recursive to DP solutions could be helpful for clarity.