You are given two 0-indexed integer arrays nums1 and nums2, of equal length n.
In one operation, you can swap the values of any two indices of nums1. The cost of this operation is the sum of the indices.
Find the minimum total cost of performing the given operation any number of times such that nums1[i] != nums2[i] for all 0 <= i <= n - 1 after performing all the operations.
Return the minimum total cost such that nums1 and nums2 satisfy the above condition. In case it is not possible, return -1.
\n
Example 1:
\n\n\nInput: nums1 = [1,2,3,4,5], nums2 = [1,2,3,4,5]\nOutput: 10\nExplanation: \nOne of the ways we can perform the operations is:\n- Swap values at indices 0 and 3, incurring cost = 0 + 3 = 3. Now, nums1 = [4,2,3,1,5]\n- Swap values at indices 1 and 2, incurring cost = 1 + 2 = 3. Now, nums1 = [4,3,2,1,5].\n- Swap values at indices 0 and 4, incurring cost = 0 + 4 = 4. Now, nums1 =[5,3,2,1,4].\nWe can see that for each index i, nums1[i] != nums2[i]. The cost required here is 10.\nNote that there are other ways to swap values, but it can be proven that it is not possible to obtain a cost less than 10.\n\n\n
Example 2:
\n\n\nInput: nums1 = [2,2,2,1,3], nums2 = [1,2,2,3,3]\nOutput: 10\nExplanation: \nOne of the ways we can perform the operations is:\n- Swap values at indices 2 and 3, incurring cost = 2 + 3 = 5. Now, nums1 = [2,2,1,2,3].\n- Swap values at indices 1 and 4, incurring cost = 1 + 4 = 5. Now, nums1 = [2,3,1,2,2].\nThe total cost needed here is 10, which is the minimum possible.\n\n\n
Example 3:
\n\n\nInput: nums1 = [1,2,2], nums2 = [1,2,2]\nOutput: -1\nExplanation: \nIt can be shown that it is not possible to satisfy the given conditions irrespective of the number of operations we perform.\nHence, we return -1.\n\n\n
\n
Constraints:
\n\nn == nums1.length == nums2.length1 <= n <= 1051 <= nums1[i], nums2[i] <= n给你两个下标从 0 开始的整数数组 nums1 和 nums2 ，两者长度都为 n 。
每次操作中，你可以选择交换 nums1 中任意两个下标处的值。操作的 开销 为两个下标的 和 。
你的目标是对于所有的 0 <= i <= n - 1 ，都满足 nums1[i] != nums2[i] ，你可以进行 任意次 操作，请你返回达到这个目标的 最小 总代价。
请你返回让 nums1 和 nums2 满足上述条件的 最小总代价 ，如果无法达成目标，返回 -1 。
\n\n
示例 1：
\n\n\n输入：nums1 = [1,2,3,4,5], nums2 = [1,2,3,4,5]\n输出：10\n解释：\n实现目标的其中一种方法为：\n- 交换下标为 0 和 3 的两个值，代价为 0 + 3 = 3 。现在 nums1 = [4,2,3,1,5] 。\n- 交换下标为 1 和 2 的两个值，代价为 1 + 2 = 3 。现在 nums1 = [4,3,2,1,5] 。\n- 交换下标为 0 和 4 的两个值，代价为 0 + 4 = 4 。现在 nums1 = [5,3,2,1,4] 。\n最后，对于每个下标 i ，都有 nums1[i] != nums2[i] 。总代价为 10 。\n还有别的交换值的方法，但是无法得到代价和小于 10 的方案。\n\n\n
示例 2：
\n\n\n输入：nums1 = [2,2,2,1,3], nums2 = [1,2,2,3,3]\n输出：10\n解释：\n实现目标的一种方法为：\n- 交换下标为 2 和 3 的两个值，代价为 2 + 3 = 5 。现在 nums1 = [2,2,1,2,3] 。\n- 交换下标为 1 和 4 的两个值，代价为 1 + 4 = 5 。现在 nums1 = [2,3,1,2,2] 。\n总代价为 10 ，是所有方案中的最小代价。\n\n\n
示例 3：
\n\n\n输入：nums1 = [1,2,2], nums2 = [1,2,2]\n输出：-1\n解释：\n不管怎么操作，都无法满足题目要求。\n所以返回 -1 。\n\n\n
\n\n
提示：
\n\nn == nums1.length == nums2.length1 <= n <= 1051 <= nums1[i], nums2[i] <= nnums1 will be considered for swapping? How to minimize the number of such operations?",
"It can be seen that greedily swapping values of indices where nums1[i] == nums2[i] is the most optimal choice. How many values cannot be swapped this way?",
"Find which indices we will swap these remaining values with, and if there are enough such indices."
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