0
1
2
2
9
3
4
5
5
5
5
8
7
6
[8, 10, 3, 6, 5, 1, 4, 7, 2, 9]
[[1], [2], [3, 9], [4], [5], [6, 7, 8, 9], [7], [8], [9], [10]]
[0, 1, 2, 3, 4, 5, 6, 6, 6, 3]
3