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# 33. Search in Rotated Sorted Array

## Description

There is an integer array `nums`

sorted in ascending order (with **distinct** values).

Prior to being passed to your function, `nums`

is **possibly rotated** at an unknown pivot index `k`

(`1 <= k < nums.length`

) such that the resulting array is `[nums[k], nums[k+1], ..., nums[n-1], nums[0], nums[1], ..., nums[k-1]]`

(**0-indexed**). For example, `[0,1,2,4,5,6,7]`

might be rotated at pivot index `3`

and become `[4,5,6,7,0,1,2]`

.

Given the array `nums`

**after** the possible rotation and an integer `target`

, return *the index of *`target`

* if it is in *`nums`

*, or *`-1`

* if it is not in *`nums`

.

You must write an algorithm with `O(log n)`

runtime complexity.

**Example 1:**

Input:nums = [4,5,6,7,0,1,2], target = 0Output:4

**Example 2:**

Input:nums = [4,5,6,7,0,1,2], target = 3Output:-1

**Example 3:**

Input:nums = [1], target = 0Output:-1

**Constraints:**

`1 <= nums.length <= 5000`

`-10`

^{4}<= nums[i] <= 10^{4}- All values of
`nums`

are**unique**. `nums`

is an ascending array that is possibly rotated.`-10`

^{4}<= target <= 10^{4}