Contiguous array, subarray sum equals to k, Longest palindrome

[paridhimalviya]

Problem1 (https://leetcode.com/problems/subarray-sum-equals-k/)

Problem2 (https://leetcode.com/problems/contiguous-array/)

Problem3 (https://leetcode.com/problems/longest-palindrome)

[super30admin]

1. Correctness: The solution correctly solves the problem. The logic for calculating the running sum and checking for the compliment is accurate.
2. Time Complexity: The time complexity is O(n), which is optimal for this problem.
3. Space Complexity: The space complexity is O(n), which is also optimal.
4. Code Quality: The code is well-organized and readable. The comments are helpful, but some could be more concise. The variable names are descriptive.
5. Efficiency: The solution is efficient. No further optimizations are needed.

Areas for Improvement:

• The comments could be more concise and focused on the key points.
• The function name subArrayCount could be more descriptive, such as subarraySumCount.
• The initialization of rSum could be done inline with the declaration for brevity.

Strengths:

• The student demonstrates a good understanding of the prefix sum pattern and hash map usage.
• The solution handles edge cases effectively.
• The code is clean and follows best practices.

[super30admin]

1. Correctness: The SubArraySumK.swift solution correctly solves the problem. The implementation is accurate and handles edge cases well.
2. Time Complexity: The solution achieves O(n) time complexity, which is optimal for this problem.
3. Space Complexity: The solution uses O(n) space, which is also optimal given the problem constraints.
4. Code Quality: The code is clean, well-commented, and follows best practices. The use of descriptive variable names (rSum, compliment, etc.) enhances readability.
5. Efficiency: The solution is efficient and does not require further optimization.

Areas for Improvement:

• The problem description and reference solution are not explicitly mentioned in the student's code. Adding a brief problem statement at the top of the file would improve clarity.
• The other files (ContiguousArray.swift and LongestPalindrome.swift) are not relevant to the current problem but are well-implemented. It would be better to separate solutions for different problems into distinct submissions.

Strengths:

• The student demonstrates a strong understanding of the prefix sum pattern and hash map usage.
• The code is well-organized and easy to follow, with good use of comments and variable naming.