[13, 5, 6, 2]
8
[11, 3, 7, 5]
10
[4, 3, 2, 3, 4]
6
[10, 5, 2, 3, 7, 5]
10
[1, 2, 3, 4, 5]
8
[5, 1, 4, 6, 2]
9
[10, 20, 30, 40]
50
[]
10
[12, 7, 19, 3, 25, 8, 14, 6, 21, 10, 17, 5, 2, 9, 11, 4, 18, 13, 20, 1]
29