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Min distance between two given nodes of a Binary Tree
Medium Accuracy: 45.05% Submissions: 59554 Points: 4

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

Example 1:

      /  \
     2    3
a = 2, b = 3
Output: 2
Explanation: The tree formed is:
     /   \ 
    2     3
We need the distance between 2 and 3.
Being at node 2, we need to take two
steps ahead in order to reach node 3.
The path followed will be:
2 -> 1 -> 3. Hence, the result is 2. 

Your Task:
You don't need to read input or print anything. Your task is to complete the function findDist() which takes the root node of the Tree and the two node values a and b as input parameters and returns the minimum distance between the nodes represented by the two given node values.

Expected Time Complexity: O(N).
Expected Auxiliary Space: O(Height of the Tree).

1 <= Number of nodes <= 104
1 <= Data of a node <= 105

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.

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Min distance between two given nodes of a Binary Tree

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