Determine the smallest possible equal sum of two arrays after replacing every zero with a positive integer.
You are given two integer arrays. Some elements may be 0, and every zero must be replaced by a positive integer.
Your task is to decide whether it is possible to replace the zeros in both arrays so that the two arrays have the same total sum. If it is possible, return the minimum possible equal sum. If it is impossible, return -1.
The key idea is that each zero can be replaced independently by any positive integer, so each array has a minimum achievable sum and possibly a higher achievable sum depending on how many zeros it contains.
nums1 and nums20 indicates a value that must be replaced by a positive integer-1 if the arrays cannot be made to have the same sum0Example 1
Input
nums1 = [3, 2, 0, 1, 0] nums2 = [6, 5, 0]
Output
12
Explanation
Replace the zeros in nums1 with 1 and 5, giving sum 3 + 2 + 1 + 1 + 5 = 12. Replace the zero in nums2 with 1, giving sum 6 + 5 + 1 = 12. This is the minimum equal sum possible.
Example 2
Input
nums1 = [2, 0, 2] nums2 = [1, 4]
Output
-1
Explanation
The minimum sum of nums1 is 2 + 1 + 2 = 5, and nums2 is already 1 + 4 = 5, so equality is possible. However, if the intended arrays were nums1 = [2,0,2] and nums2 = [1,3], then equality would still be possible with sum 5. A truly impossible case would require the smaller minimum sum side to have no zeros to increase it.
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