Pandas10 Completed

[alokusw2]

No description provided.

[super30admin]

1. Problem 1 (Group Sold Products by the Date):

   • Correctness: The solution correctly groups products by date and concatenates them in sorted order. However, it's missing the count of distinct products, which is part of the problem requirements.
   • Time Complexity: O(n log n) due to the sorting operation, where n is the number of products per date.
   • Space Complexity: O(n) for storing the grouped and sorted results.
   • Code Quality: The code is clean and readable but incomplete.
   • Efficiency: Could be improved by adding the count of distinct products.

2. Problem 2 (Daily Leads and Partners):

   • Correctness: The solution is incorrect. It groups by lead_date and partner_id but should count distinct lead_id and partner_id for each date_id and make_name.
   • Time Complexity: O(n) for grouping, but incorrect implementation.
   • Space Complexity: O(n) for storing grouped results.
   • Code Quality: The code is readable but doesn't solve the problem as stated.
   • Efficiency: N/A due to incorrect implementation.

3. Problem 3 (Actors and Directors who Cooperated At Least Three Times):

   • Correctness: The solution correctly identifies pairs with at least three cooperations.
   • Time Complexity: O(n) for grouping and counting.
   • Space Complexity: O(n) for storing grouped results.
   • Code Quality: The code is clean and readable.
   • Efficiency: The solution is efficient for the problem requirements.

General Feedback:

• The student's solutions show good understanding of pandas operations but need more attention to problem requirements.
• Missing requirements in Problem 1 and incorrect implementation in Problem 2 are significant issues.
• Code formatting and structure are good across all solutions.
• The student should carefully read problem statements and verify all requirements are met before submitting.

[super30admin]

1. Problem 1 (Group Sold Products by the Date):

   • Correctness: The solution correctly groups by date and concatenates product names, but it misses counting the number of different products sold for each date, which is part of the requirement.
   • Time Complexity: O(n log n) due to sorting, where n is the number of products.
   • Space Complexity: O(n) for storing the grouped and sorted results.
   • Code Quality: The code is readable but incomplete as it doesn't fully meet the problem requirements.
   • Efficiency: The solution could be improved by adding the count of distinct products.

2. Problem 2 (Daily Leads and Partners):

   • Correctness: The solution is incorrect. It groups by lead_date and partner_id and counts occurrences, but the problem requires counting distinct lead_id's and distinct partner_id's for each date_id and make_name.
   • Time Complexity: O(n) for grouping, where n is the number of leads.
   • Space Complexity: O(n) for storing the grouped results.
   • Code Quality: The code is readable but doesn't solve the problem as stated.
   • Efficiency: The solution needs to be revised to count distinct IDs as required.

3. Problem 3 (Actors and Directors who Cooperated At Least Three Times):

   • Correctness: The solution correctly identifies pairs that cooperated at least three times.
   • Time Complexity: O(n) for grouping, where n is the number of records.
   • Space Complexity: O(n) for storing the grouped results.
   • Code Quality: The code is well-structured and readable.
   • Efficiency: The solution is efficient and meets the problem requirements.

General Feedback:

• The student should carefully read and understand the problem requirements before implementing solutions.
• For Problem 1, the student should add the count of distinct products.
• For Problem 2, the student needs to count distinct lead_id's and partner_id's, not just group by them.
• The code quality is generally good, but the solutions need to be more accurate in meeting the problem specifications.