You are given two 0-indexed integer arrays, nums1 and nums2, both having length n.
You are allowed to perform a series of operations (possibly none).
\n\nIn an operation, you select an index i in the range [0, n - 1] and swap the values of nums1[i] and nums2[i].
Your task is to find the minimum number of operations required to satisfy the following conditions:
\n\nnums1[n - 1] is equal to the maximum value among all elements of nums1, i.e., nums1[n - 1] = max(nums1[0], nums1[1], ..., nums1[n - 1]).nums2[n - 1] is equal to the maximum value among all elements of nums2, i.e., nums2[n - 1] = max(nums2[0], nums2[1], ..., nums2[n - 1]).Return an integer denoting the minimum number of operations needed to meet both conditions, or -1 if it is impossible to satisfy both conditions.
\n
Example 1:
\n\n\nInput: nums1 = [1,2,7], nums2 = [4,5,3]\nOutput: 1\nExplanation: In this example, an operation can be performed using index i = 2.\nWhen nums1[2] and nums2[2] are swapped, nums1 becomes [1,2,3] and nums2 becomes [4,5,7].\nBoth conditions are now satisfied.\nIt can be shown that the minimum number of operations needed to be performed is 1.\nSo, the answer is 1.\n\n\n
Example 2:
\n\n\nInput: nums1 = [2,3,4,5,9], nums2 = [8,8,4,4,4]\nOutput: 2\nExplanation: In this example, the following operations can be performed:\nFirst operation using index i = 4.\nWhen nums1[4] and nums2[4] are swapped, nums1 becomes [2,3,4,5,4], and nums2 becomes [8,8,4,4,9].\nAnother operation using index i = 3.\nWhen nums1[3] and nums2[3] are swapped, nums1 becomes [2,3,4,4,4], and nums2 becomes [8,8,4,5,9].\nBoth conditions are now satisfied.\nIt can be shown that the minimum number of operations needed to be performed is 2.\nSo, the answer is 2. \n\n\n
Example 3:
\n\n\nInput: nums1 = [1,5,4], nums2 = [2,5,3]\nOutput: -1\nExplanation: In this example, it is not possible to satisfy both conditions. \nSo, the answer is -1.\n\n\n
\n
Constraints:
\n\n1 <= n == nums1.length == nums2.length <= 10001 <= nums1[i] <= 1091 <= nums2[i] <= 109给你两个下标从 0 开始的整数数组 nums1 和 nums2 ，这两个数组的长度都是 n 。
你可以执行一系列 操作（可能不执行）。
\n\n在每次操作中，你可以选择一个在范围 [0, n - 1] 内的下标 i ，并交换 nums1[i] 和 nums2[i] 的值。
你的任务是找到满足以下条件所需的 最小 操作次数：
\n\nnums1[n - 1] 等于 nums1 中所有元素的 最大值 ，即 nums1[n - 1] = max(nums1[0], nums1[1], ..., nums1[n - 1]) 。nums2[n - 1] 等于 nums2 中所有元素的 最大值 ，即 nums2[n - 1] = max(nums2[0], nums2[1], ..., nums2[n - 1]) 。以整数形式，表示并返回满足上述 全部 条件所需的 最小 操作次数，如果无法同时满足两个条件，则返回 -1 。
\n\n
示例 1：
\n\n\n输入：nums1 = [1,2,7]，nums2 = [4,5,3]\n输出：1\n解释：在这个示例中，可以选择下标 i = 2 执行一次操作。\n交换 nums1[2] 和 nums2[2] 的值，nums1 变为 [1,2,3] ，nums2 变为 [4,5,7] 。\n同时满足两个条件。\n可以证明，需要执行的最小操作次数为 1 。\n因此，答案是 1 。\n\n\n
示例 2：
\n\n\n输入：nums1 = [2,3,4,5,9]，nums2 = [8,8,4,4,4]\n输出：2\n解释：在这个示例中，可以执行以下操作：\n首先，选择下标 i = 4 执行操作。\n交换 nums1[4] 和 nums2[4] 的值，nums1 变为 [2,3,4,5,4] ，nums2 变为 [8,8,4,4,9] 。\n然后，选择下标 i = 3 执行操作。\n交换 nums1[3] 和 nums2[3] 的值，nums1 变为 [2,3,4,4,4] ，nums2 变为 [8,8,4,5,9] 。\n同时满足两个条件。 \n可以证明，需要执行的最小操作次数为 2 。 \n因此，答案是 2 。\n\n\n
示例 3：
\n\n\n输入：nums1 = [1,5,4]，nums2 = [2,5,3]\n输出：-1\n解释：在这个示例中，无法同时满足两个条件。\n因此，答案是 -1 。\n\n\n
\n\n
提示：
\n\n1 <= n == nums1.length == nums2.length <= 10001 <= nums1[i] <= 1091 <= nums2[i] <= 109nums1[n - 1] and nums2[n - 1] are fixed (they are not swapped).",
"For each index i, there are only 3 possibilities: nums1[i] <= nums1[n - 1] && nums2[i] <= nums2[n - 1]. We don't need to swap them.nums1[i] <= nums2[n - 1] && nums2[i] <= nums1[n - 1]. We have to swap them.2 cases to determine the minimum number of operations: nums1[n - 1] and nums2[n - 1] are fixed.1 + the number of indices that need to be swapped when nums1[n - 1] and nums2[n - 1] are swapped.-1 if there is no solution in either case."
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