Not getting the idea

#1

so i have to constuct tree 1st from pre order for both and then check if they are identical or not?

#2

Yes @gaurav_kumar,

That’s what you are required to do.

Important point to remember:
You are required to check if the trees are structurally identical or not.

Example 1:
10 true 20 true 40 false false true 50 false false true 30 true 60 false false true 73 false false
10 true 20 true 40 false false true 50 false false true 30 true 53 false false true 73 false false
Example 2:
10 true 20 true 40 false false true 50 false false true 30 true 60 false false true 73 false false
10 true 20 true 40 false false true 50 false false true 30 true 60 false false true 73 false false

Both are structurally identical. But your code returns false for first and true for second.
Solution:
Don’t compare the values of nodes.

Hope, this would help.
Give a like if you are satisfied.

#3

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