Function to Check if a Tree is a BST or Not issue#1236 #1365
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Issue #1236
Description: This pull request adds a function in C to check if a binary tree satisfies the properties of a binary search tree (BST). The function isBST uses a helper isBSTUtil to recursively validate each node, ensuring all nodes in the left subtree are less and all nodes in the right subtree are greater than the current node.
Changes Made:
Implemented isBSTUtil to recursively check the BST properties.
Added isBST function to initialize and call the helper function.
Created a sample test in main to verify functionality.
Testing: The code has been tested with a sample binary tree structure, and it successfully identifies if the tree is a BST.