33. Search in Rotated Sorted Array (Array, Binary Search)

링크 - https://leetcode.com/problems/search-in-rotated-sorted-array/description/?envType=company&envId=facebook&favoriteSlug=facebook-thirty-days

난이도 - Medium

Intuition

 

Code

class Solution:
    def search(self, nums: List[int], target: int) -> int:
        left, right = 0, len(nums) - 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

Complexity

Time Complexity: O(logN)

Space Complexity: O(1)