You are given an array of integers `arr` and an integer `target`.

You have to find two non-overlapping sub-arrays of `arr` each with a sum equal `target`. There can be multiple answers so you have to find an answer where the sum of the lengths of the two sub-arrays is minimum.

Return the minimum sum of the lengths of the two required sub-arrays, or return `-1` if you cannot find such two sub-arrays.

Example 1:

    Input: arr = [3,2,2,4,3], target = 3
    Output: 2
    Explanation: Only two sub-arrays have sum = 3 ([3] and [3]). The sum of their lengths is 2.

Example 2:

    Input: arr = [7,3,4,7], target = 7
    Output: 2
    Explanation: Although we have three non-overlapping sub-arrays of sum = 7 ([7], [3,4] and [7]), but we will choose the first and third sub-arrays as the sum of their lengths is 2.

Example 3:

    Input: arr = [4,3,2,6,2,3,4], target = 6
    Output: -1
    Explanation: We have only one sub-array of sum = 6.

Constraints:

- `1 <= arr.length <= 105`
- `1 <= arr[i] <= 1000`
- `1 <= target <= 108`