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An algorithm is a sequence of well-defined steps that defines an abstract solution to a problem. Use this tag when your issue is related to design and analysis of algorithms.

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How can there be 10 steps in the binary search algorithm for the phone book search problem?

but they, in the lecture, are saying that this algorithm involves 10 steps. Why? He says:"10 - give or take" in the lecture, which means that 10 is an estimate with a small uncertainty in eithe …
John Hammond's user avatar