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Problem Challenge 3: Rotation Count (medium)
Problem Statement
Given an array of numbers which is sorted in ascending order and is rotated ‘k’ times around a pivot, find ‘k’.
You can assume that the array does not have any duplicates.
Example 1:
Input: [10, 15, 1, 3, 8]
Output: 2
Explanation: The array has been rotated 2 times.
Example 2:
Input: [4, 5, 7, 9, 10, -1, 2]
Output: 5
Explanation: The array has been rotated 5 times.
Example 3:
Input: [1, 3, 8, 10]
Output: 0
Explanation: The array has not been rotated.
Constraints:
1 <= arr.length <= 5000
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