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.

Distance from root to given node
Distance from root to given node

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