Describe an advanced data structure : From Painfully Slow to Optimal: The Maximum Sum Subarray

The video tutorial explains how to solve the maximum sum subarray problem using different approaches. It starts with a brute force method using nested loops, which has a time complexity of O(n^3). The tutorial then optimizes this to O(n^2) by reducing unnecessary calculations. Finally, it introduces Kadane's Algorithm, which efficiently solves the problem in O(n) time. The video also emphasizes the importance of testing implementations to ensure correctness.

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