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I am coding this in Python. The fifth standard test I fail. The right asnwer should be '101112'
This puzzles me because I don't understand how the one could repeat like that and then end on a two.
I thought that it's always going up by one then down by one then if needed up again, then if needed down again etc.
or staying the same, but not a mixture of all three directions.
Can anyone figure out what is the test case that is supposed to have an answer '101112'?
Thank you.

My solution in Python passed all the tests. But it times out! Why would it time out, the code that passed all the tests is so simple! Thanks!

It returns 9223372036854774784