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Yeah sure but at that point, it's more optimization than algorithm design. Of course, with any algorithm, you always have the hidden constant that you must account for. Also, what I was saying does not apply to the entier CS field. It only applies when you try to design an algorithm for a problem that does not yet have an efficient algorithm. I don't have much experience but I don't think it is really hard to see the cost of the hidden constant in most algorithms.