1775. Equal Sum Arrays With Minimum Number of Operations

https://leetcode.com/problems/equal-sum-arrays-with-minimum-number-of-operations

Description

You are given two arrays of integers nums1 and nums2, possibly of different lengths. The values in the arrays are between 1 and 6, inclusive.

In one operation, you can change any integer's value in any of the arrays to any value between 1 and 6, inclusive.

Return the minimum number of operations required to make the sum of values in nums1 equal to the sum of values in nums2. Return -1​​​​​ if it is not possible to make the sum of the two arrays equal.

Example 1:

**Input:** nums1 = [1,2,3,4,5,6], nums2 = [1,1,2,2,2,2]
**Output:** 3
**Explanation:** You can make the sums of nums1 and nums2 equal with 3 operations. All indices are 0-indexed.
- Change nums2[0] to 6. nums1 = [1,2,3,4,5,6], nums2 = [**6**,1,2,2,2,2].
- Change nums1[5] to 1. nums1 = [1,2,3,4,5,**1**], nums2 = [6,1,2,2,2,2].
- Change nums1[2] to 2. nums1 = [1,2,**2**,4,5,1], nums2 = [6,1,2,2,2,2].

Example 2:

**Input:** nums1 = [1,1,1,1,1,1,1], nums2 = [6]
**Output:** -1
**Explanation:** There is no way to decrease the sum of nums1 or to increase the sum of nums2 to make them equal.

Example 3:

**Input:** nums1 = [6,6], nums2 = [1]
**Output:** 3
**Explanation:** You can make the sums of nums1 and nums2 equal with 3 operations. All indices are 0-indexed. 
- Change nums1[0] to 2. nums1 = [**2**,6], nums2 = [1].
- Change nums1[1] to 2. nums1 = [2,**2**], nums2 = [1].
- Change nums2[0] to 4. nums1 = [2,2], nums2 = [**4**].

Constraints:

• 1 <= nums1.length, nums2.length <= 105

• 1 <= nums1[i], nums2[i] <= 6

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