[1, 1, 1, 1, 1]
[0, 1, 2, 3, 4]
[]
[102, 102, 101, 102]
[0, 1, 3]
[101]
[10102, 10203, 10102, 10203]
[0, 2]
[10203, 10203]
[10203, 10203]
[0, 1]
[]
[1020201, 1020301]
[0]
[1020301]
[102030404, 102010101, 102020301, 102010201, 102030302]
[0]
[102010101, 102020301, 102010201, 102030302]
[102010101, 102020301, 102010201, 102030302]
[0]
[102020301, 102010201, 102030302]
[102020301, 102010201, 102030302]
[0]
[102010201, 102030302]
[102010201, 102030302]
[0]
[102030302]
8