Objective: Given a Binary tree, Find the size of the tree.
Note : Size of the tree is number of nodes in the tree
Input: A Binary Tree.
Output: Size of the tree.
- Very Simple solution
- Start from the root.
- Size = 1 (for the root) + Size Of left Sub-Tree + Size Of right Sub-Tree
- solve the left sub-tree and right sub-tree recursively.
Time Complexity : O(n)
Size of the Tree is : 7