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