Find the Special Index Using Prefix Sum | DSA Interview Problem (O(N)) скачать в хорошем качестве

Find the Special Index Using Prefix Sum | DSA Interview Problem (O(N))

In this video, we solve the “Find the Special Index” problem using the Prefix Sum technique. You will learn how to identify problem patterns from the description and convert a brute-force solution into an optimal O(N) algorithm. This problem is frequently asked in DSA interviews, coding rounds, and competitive programming. This video explain: Why the brute force approach is inefficient How Prefix Sum and Suffix Sum reduce time complexity Final optimized logic and code explanation Best for: Beginners, DSA learners, Coding Interview Preparation Timestamps 0:00 Introduction to the Problem 1:58 Example Explanation 3:03 Brute Force Approach 4:39 Identifying the Prefix Sum Pattern 6:44 Important Prefix Sum Properties 18:03 Time Complexity Analysis 18:28 Code Logic Explanation 19:33 Final Output & Conclusion Prefix Sum, Special Index Problem, Find Special Index, Prefix Sum Algorithm, DSA Prefix Sum, Suffix Sum, Array Problems, Coding Interview Questions, DSA Interview Problems, Competitive Programming, Optimal Algorithm, Time Complexity Optimization, O(N) Algorithm, Brute Force vs Optimal, Data Structures And Algorithms, Problem Solving In DSA #PrefixSum #SpecialIndex #DSA #CodingInterview #ArrayProblems #Algorithm #CompetitiveProgramming #ProblemSolving #InterviewPreparation #DSATutorial #CodingQuestions #Programming