[0, 0, 1, 0, 0]
[2, 0, 1, 0, 0]
[2, 0, 1, 3, 0]
[2, 0, 1, 3, 4]
[5, 2, 1, 3, 4]
[5, 2, 1, 3, 4]
5 2 1 3 4