Tree top view problem

#1


getting no output error in all testcases.
pls tell the correct code.

#2

Hi @yutikakhanna,
in ur build function, pass root as parameter since u r trying to find top view of a tree with root as the ‘‘root’’ node.
in ur present code, ur root is not getting updated and is NULL all d time because of which its not printing any output.

#3

pls explain in the form of a code

#4

i have updated ur current code. U can refer to dis for the modifications.

#5

Moreover @yutikakhanna , the input of the tree will be given in level order format(in hacker blocks), so u also need to modify that since ur present code doen’t take input in that format.
Hope dis resolves ur doubt. if u still have any doubts, feel free to post them here.

#6

all the testcases are showing wrong answer in this code

#7

have u made the changes to the build function???
as i told, in ur current code, u r taking not taking input in level order format.
eg input={1,2,3,-1,-1,-1,-1}, ur present code is building tree like:
---------------1
-------------2
-----------3
whereas the tree that is being given as input need to be interpreted as :
---------------1
-------------2–3
So, try making some changes in ur build function

#8

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