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Give a big-O estimate for the number of comparisons used by the algorithm that determines the number of 1s in a bit string of length n by examining each bit of the string to determine whether it is a 1 bit.

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sxelemon
the notation would be O (n-1) because there would be no need to compare with the first bit however this notation is most commonly noted as O (n) but the first is also technically correct
Hagrid
The answer is "n". 
Algorithms are considered to be process or a bunch or rules that is to be followed in computing or calculating. This is used to solve operational problems especially by a computer. Algorithms perform data processing, calculation, or/and automated reasoning activities. 


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