Create maximum number of length k by picking digits from two arrays.
Sample Input:
[3,4,6,5], [9,1,2,5,8,3], 5
Sample Output:
[9,8,6,5,3]
Hints
Hint 1
Find max subsequence from each array
Hint 2
Merge two subsequences to form maximum
Hint 3
Try all possible splits of k between arrays
