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Find The Distance From Root To Given Node of a Binary Tree.
Objective:  Find The Distance From Root To Given Node of a binary tree.
What does Distance mean: It means a number of edges between two nodes.
Approach:
 This problem is similar to "Find Path From Root To Given Node"
 Make the following change to that
 Instead of returning the boolean value return the integer, nodes in the path will return the number = 1 + number returned by the previous node in the path.
 The final return will give you the number of nodes between the root and the given leaf node so the distance will be (edges)= number of nodes 1
Code:
Output:
Distance from root to 45 is : 3
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