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Count Internal node of binary search tree (iterative approach) using queue

Time complexity of this program O(n)

Accepted Output

Given BST tree node is:

540, 426, 598, 414, 497, 546, 431, 545, 580, 572

View Tree Click Here

540426598546580572414497545431

Result :

Number of Internal Node is [6]

Given BST tree node is:

470, 434, 591, 428, 541, 432, 515, 571, 502, 486

Edit Tree Click Here

470591541571434428432515502486

Result :

Number of Internal Node is [7]

Below in C implementation of this problem. Iterative approach.

Output
  BST Data is :  30  40  90  104  104  115  140  220  240
 Number of internal Node is [6]
 Free Memory of Queue

 Free BST node
 

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