Two Sum

The video tutorial covers the 2-sum problem, a common interview question. It begins with an introduction to the problem and its constraints, followed by an example using a basic O(n^2) solution with nested loops. The tutorial then presents an optimized O(n) solution using a dictionary to store and access data efficiently. Finally, the video demonstrates coding the optimized solution and testing its performance.

What new insight or understanding did you gain from this video?