You are given a 0-indexed array nums consisting of n positive integers.
The array nums is called alternating if:
nums[i - 2] == nums[i], where 2 <= i <= n - 1.nums[i - 1] != nums[i], where 1 <= i <= n - 1.In one operation, you can choose an index i and change nums[i] into any positive integer.
Return the minimum number of operations required to make the array alternating.
\n\n\n
Example 1:
\n\n\nInput: nums = [3,1,3,2,4,3]\nOutput: 3\nExplanation:\nOne way to make the array alternating is by converting it to [3,1,3,1,3,1].\nThe number of operations required in this case is 3.\nIt can be proven that it is not possible to make the array alternating in less than 3 operations. \n\n\n
Example 2:
\n\n\nInput: nums = [1,2,2,2,2]\nOutput: 2\nExplanation:\nOne way to make the array alternating is by converting it to [1,2,1,2,1].\nThe number of operations required in this case is 2.\nNote that the array cannot be converted to [2,2,2,2,2] because in this case nums[0] == nums[1] which violates the conditions of an alternating array.\n\n\n
\n
Constraints:
\n\n1 <= nums.length <= 1051 <= nums[i] <= 105给你一个下标从 0 开始的数组 nums ，该数组由 n 个正整数组成。
如果满足下述条件，则数组 nums 是一个 交替数组 ：
nums[i - 2] == nums[i] ，其中 2 <= i <= n - 1 。nums[i - 1] != nums[i] ，其中 1 <= i <= n - 1 。在一步 操作 中，你可以选择下标 i 并将 nums[i] 更改 为 任一 正整数。
返回使数组变成交替数组的 最少操作数 。
\n\n\n\n
示例 1：
\n\n\n输入：nums = [3,1,3,2,4,3]\n输出：3\n解释：\n使数组变成交替数组的方法之一是将该数组转换为 [3,1,3,1,3,1] 。\n在这种情况下，操作数为 3 。\n可以证明，操作数少于 3 的情况下，无法使数组变成交替数组。\n\n
示例 2：
\n\n\n输入：nums = [1,2,2,2,2]\n输出：2\n解释：\n使数组变成交替数组的方法之一是将该数组转换为 [1,2,1,2,1].\n在这种情况下，操作数为 2 。\n注意，数组不能转换成 [2,2,2,2,2] 。因为在这种情况下，nums[0] == nums[1]，不满足交替数组的条件。\n\n\n
\n\n
提示：
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