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Given a binary tree, find height of it. Height of empty tree is 0 and height of below tree is 3.

1

/ \

10 39

/

5

**Input:**

The task is to complete the method which takes one argument, root of Binary Tree. The struct Node has a data part which stores the data, pointer to left child and pointer to right child.

There are multiple test cases. For each test case, this method will be called individually.

**Output:**

The function should return height tree.

**Constraints:**

1 <=T<= 30

1 <=Number of nodes<= 100

1 <=Data of a node<= 1000

**Example:
Input:**

2

2

1 2 L 1 3 R

4

10 20 L 10 30 R 20 40 L 20 60 R

**Output:**

2

3

There are two test casess. First case represents a tree with 3 nodes and 2 edges where root is 1, left child of 1 is 2 and right child of 1 is 3. Second test case represents a tree with 4 edges and 5 nodes.

**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, and should not print anything on stdout/console. The task is to complete the function specified, and not to write the full code.

Author: kartik

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