All operations except clone work O(1) in my program, but clone works in O(n). Despite that fact, my solution works in 0.218s

New tests were added. Thank you.

Edited by author 27.09.2020 14:29

Tests not check memory leaks, but check amount of used memory... Its weard. If you dont copy robot's stacks and just relink pointers, tests not check that you have lost memory
Case
Learn 1 1
Learn 1 2
....
Learn 1 n
Clone 1
Rollback 1
Rollback 2
....
Rollback 1
Rollback 2
Learn 1 1
...
Learn 1 n

In my solution in the end youll have n losted  elements and n new elements in 1 robot that is assimptotically equal to copy all stacks