Given two sorted integer arrays, find the smallest k products of the two arrays.
Example 1:
Input: arr1 = [-2, -1, 0, 1, 2], arr2 = [-3, -1, 2, 4, 5], k = 3 Output: [-10, -8, -6] Explanation: -2 * 5, -2 * 4, 2 * -3