I donot understand the input format..plz explain

#1

I donot understand the input formatā€¦plz explain

#2

input is given in preorder format, that is, first you get current node followed by true/false.
If true go ahead as this will be left child,else go to right child as left child is null. Proceed similarly recursively.
PS : you donā€™t have to actually construct tree! you can simply check equivalence of inputs as strings!

#3

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