Proving O(log n) comparisons in key compaisons binary search
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Prove that any binary search algorithm on a sorted array of size n that uses only key comparisons must require at least omega (log n) comparisons in the worst case.
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Solution Summary
A binary search tree proof is provided. A comparison is proved for the binary searches.
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Proof:
Suppose the sorted array is A with size n. That is A[1], A[2], ..., A[n].
According to the binary search, in the worst case, the root A[1] ...
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