[1, 2, 3]
[1, 20, 3, 4]
[1, 20, 30, 4]
[1, 20, 3, 4]
4
[1, 20, 3, 4, 1, 20, 3, 4]
[20, 3]
11774739814239950349
11774739814239950349
true
true