Distinct Subsequences II | LeetCode 940 | DP Explained

In this video, we solve LeetCode 940 - Distinct Subsequences II. We start from the brute force approach and gradually optimize it using Dynamic Programming. Topics covered: Brute Force / Recursion Understanding duplicate subsequences Finding the DP recurrence Tracking previous occurrences Memoization Tabulation Time and Space Complexity The main idea is to understand **why duplicate subsequences are generated and how we can eliminate those duplicates efficiently**, instead of simply memorizing the DP formula. Problem: LeetCode 940 - Distinct Subsequences II Final Complexity: Time: O(n) Space: O(n) If you found the explanation helpful, consider subscribing for more LeetCode, DSA, Dynamic Programming, and problem-solving videos. #LeetCode #DynamicProgramming #DSA