You are given two integer arrays nums1 and nums2 of equal length n and an integer k. You can perform the following operation on nums1:
i and j and increment nums1[i] by k and decrement nums1[j] by k. In other words, nums1[i] = nums1[i] + k and nums1[j] = nums1[j] - k.nums1 is said to be equal to nums2 if for all indices i such that 0 <= i < n, nums1[i] == nums2[i].
Return the minimum number of operations required to make nums1 equal to nums2. If it is impossible to make them equal, return -1.
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Example 1:
\n\n\nInput: nums1 = [4,3,1,4], nums2 = [1,3,7,1], k = 3\nOutput: 2\nExplanation: In 2 operations, we can transform nums1 to nums2.\n1st operation: i = 2, j = 0. After applying the operation, nums1 = [1,3,4,4].\n2nd operation: i = 2, j = 3. After applying the operation, nums1 = [1,3,7,1].\nOne can prove that it is impossible to make arrays equal in fewer operations.\n\n
Example 2:
\n\n\nInput: nums1 = [3,8,5,2], nums2 = [2,4,1,6], k = 1\nOutput: -1\nExplanation: It can be proved that it is impossible to make the two arrays equal.\n\n\n
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Constraints:
\n\nn == nums1.length == nums2.length2 <= n <= 1050 <= nums1[i], nums2[j] <= 1090 <= k <= 105Compiled with clang 11 using the latest C++ 17 standard.
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Most standard library headers are already included automatically for your convenience.
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