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