Some test cases failing

#1

please check code, some test cases are failing

#2

your approach is incorrect.
think about this case 1 2 -1 3 -1 4 5 6 -1 -1 -1 -1 -1
your output will be only 2 1… but answer is 2 1 4 6.
think about better approach.

thanks

#3

can you please draw the tree for the input you are giving?

#4

this is very simple test case. its difficult to draw tree in this platform.
can’t you draw tree for this input?
you have written code for reading the input. this is not even a minute task.

#5

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#6

can you explain the test case to me?
what does it mean this?
1 2 -1 3 -1 4 5 6 -1 -1 -1 -1 -1
----------------------------------1----------
-------------------------2----------------x
-------------------3---------x
-------------4----------5
-------6--------x x---------x
x-------x