Transform To Normal From Left-cloned Tree

easy
1. You are given a partially written BinaryTree class.
2. You are required to complete the body of transBackFromLeftClonedTree function. The function is expected to convert a left-cloned tree back to it's original form. The left cloned tree is dicussed in previous question. In a left-clone tree a new node for every node equal in value to it is inserted between itself and it's left child. For clarity check out the question video.
3. Input and Output is managed for you. 

Input Format

Input is managed for you.

Output Format

Output is managed for you.

Constraints

None

Notice

Try First, Check Solution later

1. You should first read the question and watch the question video.
2. Think of a solution approach, then try and submit the question on editor tab.
3. We strongly advise you to watch the solution video for prescribed approach.

Example

Input
37
50 50 25 25 12 12 n n n n 37 37 30 30 n n n n n n 75 75 62 62 n n 70 70 n n n n 87 87 n n n
Output
25 <- 50 -> 75
12 <- 25 -> 37
. <- 12 -> .
30 <- 37 -> .
. <- 30 -> .
62 <- 75 -> 87
. <- 62 -> 70
. <- 70 -> .
. <- 87 -> .
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Transform To Left-cloned Tree
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