minimum-total-cost-to-make-arrays-unequal

Minimum Total Cost to Make Arrays Unequal

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minimumTotalCost

You are given two 0-indexed integer arrays <code>nums1</code> and <code>nums2</code>, of equal length <code>n</code>.

In one operation, you can swap the values of any two indices of <code>nums1</code>. 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 <code>nums1[i] != nums2[i]</code> for all <code>0 &lt;= i &lt;= n - 1</code> after performing all the operations.

Return the minimum total cost such that <code>nums1</code> and <code>nums2</code> satisfy the above condition. In case it is not possible, return <code>-1</code>.

&nbsp;
Example 1:

<pre>
Input: nums1 = [1,2,3,4,5], nums2 = [1,2,3,4,5]
Output: 10
Explanation: 
One of the ways we can perform the operations is:
- Swap values at indices 0 and 3, incurring cost = 0 + 3 = 3. Now, nums1 = [4,2,3,1,5]
- Swap values at indices 1 and 2, incurring cost = 1 + 2 = 3. Now, nums1 = [4,3,2,1,5].
- Swap values at indices 0 and 4, incurring cost = 0 + 4 = 4. Now, nums1 =[5,3,2,1,4].
We can see that for each index i, nums1[i] != nums2[i]. The cost required here is 10.
Note 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.
</pre>

Example 2:

<pre>
Input: nums1 = [2,2,2,1,3], nums2 = [1,2,2,3,3]
Output: 10
Explanation: 
One of the ways we can perform the operations is:
- Swap values at indices 2 and 3, incurring cost = 2 + 3 = 5. Now, nums1 = [2,2,1,2,3].
- Swap values at indices 1 and 4, incurring cost = 1 + 4 = 5. Now, nums1 = [2,3,1,2,2].
The total cost needed here is 10, which is the minimum possible.
</pre>

Example 3:

<pre>
Input: nums1 = [1,2,2], nums2 = [1,2,2]
Output: -1
Explanation: 
It can be shown that it is not possible to satisfy the given conditions irrespective of the number of operations we perform.
Hence, we return -1.
</pre>

&nbsp;
Constraints:

<ul>
	<li><code>n == nums1.length == nums2.length</code></li>
	<li><code>1 &lt;= n &lt;= 105</code></li>
	<li><code>1 &lt;= nums1[i], nums2[i] &lt;= n</code></li>
</ul>

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