Jun 112012

Given a Binary Search Tree (BST), where will you find the node containing minimum value in the Tree? For example: If the tree is as given below

Then answer is 1. Write a function that returns the least value in given BST.

**Solution:**

The minimum value in a Binary search tree is always in the left-most node. (The maximum value will be in the right-most node. If the left subtree is empty, then root stores the minimum value.

int getMinimum(Node* root) { while(root->lptr != NULL) root = root->lptr; return root->data; }

In this cases, we are assuming the Node of the tree is defined as below:

struct Node { Node* lptr; // Left Subtree int data; Node * rptr; // Right Subtree };

Feel free to provide your feedback / comments.

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