Which of the following is correct recurrence for worst case of Binary Search?T(n) = 2T(n/2) + O(1) and T(1) = T(0) = O(1)T(n) = T(n-1) + O(1) and T(1) = T(0) = O(1)T(n) = T(n/2) + O(1) and T(1) = T(0) = O(1)T(n) = T(n-2) + O(1) and T(1) = T(0) = O(1)
Question
Which of the following is correct recurrence for worst case of Binary Search?T(n) = 2T(n/2) + O(1) and T(1) = T(0) = O(1)T(n) = T(n-1) + O(1) and T(1) = T(0) = O(1)T(n) = T(n/2) + O(1) and T(1) = T(0) = O(1)T(n) = T(n-2) + O(1) and T(1) = T(0) = O(1)
Solution
The correct recurrence for the worst case of Binary Search is T(n) = T(n/2) + O(1) and T(1) = T(0) = O(1).
Here's why:
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In each step of a binary search, the algorithm divides the input into two equal halves. This is represented by T(n/2).
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The algorithm performs a constant amount of work in each step (i.e., comparing the target value with the middle element), which is represented by O(1).
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The base case is when the size of the input is 1 or 0, in which case the algorithm performs a constant amount of work, represented by T(1) = T(0) = O(1).
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