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$ curl repovive.com/roadmaps/fundamental-algorithms/binary-search/search-in-rotated-array-implementation

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$ curl repovive.com/roadmaps/fundamental-algorithms/binary-search/search-in-rotated-array-implementation

Repovive

Search in Rotated Array - Implementation - Binary Search | Fundamental Algorithms | Repovive

Repovive.

Fundamental Algorithms8 sections · 294 units2h total

Open in Course

Search in Rotated Array - Implementation

Here is the implementation:

function search(nums, target):
    left = 0
    right = nums.length - 1

    while left <= right:
        mid = (left + right) / 2

        if nums[mid] == target:
            return mid

        if nums[left] <= nums[mid]:
            if nums[left] <= target < nums[mid]:
                right = mid - 1
            else:
                left = mid + 1
        else:
            if nums[mid] < target <= nums[right]:
                left = mid + 1
            else:
                right = mid - 1

    return -1

This runs in $O(\log n)$ time and $O(1)$ space (excluding input).