Remove Half Nodes
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  Difficulty: Easy   Marks: 2

Given A binary Tree, Task is to remove all the half nodes (which has only one child).
For example consider the below tree.

Nodes 7, 5 and 9 are half nodes as one of their child is Null. We need to remove all such half nodes and return the root pointer of following new tree.

First line of input contains the number of test cases T. For each test case, there will be two lines: 
1. First line of each test case will be an integer N denoting the number of parent child relationships.
2. Second line of each test case will print the level order traversal of the tree in the form of N space separated triplets. The description of triplets is as follows:

  • Each triplet will contain three space-separated elements of the form (int, int char).
  • The first integer element will be the value of parent
  • The second integer will be the value of corresponding left or right child. In case the child is null, this value will be -1.
  • The third element of triplet which is a character can take any of the three values ‘L’, ‘R’ or ‘N’. L denotes that the children is a left child, R denotes that the children is a Right Child and N denotes that the child is NULL.

Please note that the relationships are printed only for internal nodes and not for leaf nodes. 

Single line output, print the modified tree in inorder traversal.

Your Task:
You don't have to take input , just complete the function removeHalfNodes() which accepts root node of the tree as parameter and returns the root node of new tree (after removing half nodes).



7 7 L 7 8 R 7 2 L 7 -1 N
2 7 8 

Note:The Input/Ouput format and Example given are used for system's internal purpose, and should be used by a user for Expected Output only. As it is a function problem, hence a user should not read any input from stdin/console. The task is to complete the function specified, and not to write the full code.

** For More Input/Output Examples Use 'Expected Output' option **

Contributor: Saksham Raj Seth
Author: saksham seth

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