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.

Input:
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. 

Output:
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).

Constraints:
1<=T<=100
1<=N<=100

Example:
Input:

1
4
7 7 L 7 8 R 7 2 L 7 -1 N
Output:
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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