
You are given an integer array nums and an integer k .
For each index i where 0 <= i < nums.length , change nums[i] to be either nums[i] + k or nums[i] - k .
The score of nums is the difference between the maximum and minimum elements in nums .
Return the minimum score of nums after changing the values at each index .
1 <= nums.length <= 10 ^40 <= nums[i] <= 10 ^40 <= k <= 10 ^4