4.5, due October 15th

I read the section. I thought it was super interesting. This is a topic I spent a lot of time learning about on my own during high school. There's a lot of problems that are classified as NP. The first problem I learned about was the Knapsack problem. The travelling salesman problem is also a common one I've learned about. I think it's nice to be learning about the formal process of trying to prove things about these equations.

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