3 Sum Problem Explained | Brute Force to Optimal using Two Pointers
In this video, we solve the 3 Sum problem step by step, starting with the brute force approach and then moving to the optimized Two Pointer solution.
The explanation is kept simple and intuitive, focusing on the flow of the algorithm, so that even beginners can clearly understand how the optimized solution works.
What you’ll learn in this video:
Complete understanding of the 3 Sum problem
Brute force approach and why it fails for large inputs
Key observations to optimise the solution
Role of sorting in the problem
How the Two Pointer technique works step by step
Proper handling of duplicate elements
Time and space complexity comparison
Interview-focused insights
This video is useful for:
DSA beginners and intermediates
Coding interview preparation
Anyone struggling with array and two pointer problems
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