[1]
[List([10]), [List([]), List([])]]
[List([10]), [List([4]), List([])]]
[2, 0]

[6 3]

[2 1]

[List([1]), List([1, 4])]
[List([10]), [List([4]), List([])], [2, 0], [6, 3; 2, 1], List([1]), List([1
, 4])]
(~x)->x[1]++
4
[4, [4]]
[4, [4]]
Total time spent: 0
