0081.py

class Solution:
    def search(self, nums, target):
        """
        :type nums: List[int]
        :type target: int
        :rtype: bool
        """
        if not nums:
            return False

        low, high = 0, len(nums) - 1

        while low <= high:
            mid = (low + high) // 2
            if target == nums[mid]:
                return True

            if nums[low] == nums[mid]:
                low += 1
            elif nums[low] < nums[mid]:
                if nums[low] <= target <= nums[mid]:
                    high = mid - 1
                else:
                    low = mid + 1
            else:
                if nums[mid] <= target <= nums[high]:
                    low = mid + 1
                else:
                    high = mid - 1

        return False
        
if __name__ == "__main__":
    nums = [1,3,1,1,1]
    target = 3
    print(Solution().search(nums, target))