Binary Search Counting

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Presentation transcript:

Binary Search Counting counting "# looks" in a binary search

linear search A list of 1000 items, searching for one value, how many items might you have to look at to see if it is what you are looking for? # Looks:

binary search A list of 1000 items, searching for one value, how many items might you have to look at to see if it is what you are looking for? # Looks: - lets figure it out

binary search A list of 1=20 item # Looks: A list of 2=21 items # Looks: A list of 4=22 items # Looks: A list of 8=23 items # Looks: A list of 16=24 items # Looks: A list of 32=25 items # Looks: A list of 2n items # Looks:

binary search A list of 1000 (about 1024 = 210) items, searching for one value, how many items might you have to look at to see if it is what you are looking for? # Looks: -