Height of Spiral Tree
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  Difficulty: Easy   Marks: 2

Given a special binary tree of size N, whose leaf nodes are connected to form a circular doubly linked list, your task is to complete the function findTreeHeight(), that should return the height of the tree.
For Example:

  /   \ 
 2    3
 /  \
4  5

In the above binary tree, 6, 5 and 3 are leaf nodes and they form a circular doubly linked list. Here, the left pointer of leaf node will act as a previous pointer of circular doubly linked list and its right pointer will act as next pointer of circular doubly linked list.

The first line of input contains T, denoting the number of testcases. Each testcase contains one line i.e. N(number of edges).

For each testcase in new line, print the height of spiral tree.

User Task:
Since this is a functional problem you don't have to worry about input, you just have to complete the function findTreeHeight().

1 <= T <= 76
1 <= N <= 300


1 2 L 1 3 R 2 4 L
1 2 L 1 3 R 2 4 L 2 5 R 4 6 L


Testcase 1:
There are 3 edges and 4 nodes in spiral tree where leaf nodes 4 and 3 are connected in circular doubly linked list form. Thus the height of spiral tree is 3.

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

Contributor: Harshit Sidhwa
Author: harshitsidhwa

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