Difficulty Level: Medium

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Min distance between two given nodes of a Binary Tree (Function Problem)

Given a binary tree and two node values your task is to find the minimum distance between them.

The task is to complete the fuction findDist which takes 3 argument, the  root of the  Binary Tree and two node values a and b .
There are multiple test cases. For each test case, this method will be called individually.

The function should return min distance between two node values .

1 <=T<= 30
1 <=Number of nodes<= 100
1 <=Data of a node<= 1000


1 2 L 1 3 R
2 3 


In above example there is one  test case which represent 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.  

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: Amit Khandelwal
Author: Shubham Joshi 1

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