Minimum Operations to Make the Array Alternating

Given an array of integers nums, you are allowed to perform the following operation any number of times: choose any two indices i and j (1-indexed) such that abs(nums[i] - nums[j]) % 2 == 1 and swap nums[i] with nums[j]. The array is considered alternating if no two adjacent elements are equal. Return the minimum number of operations needed to make the array alternating.