1. Intro to BST #

Created Thursday 08 April 2021

• The simplest definition: A binary tree where all the nodes in the left subtree are smaller than the root and all the nodes on right subtree are greater than the root. i.e the root specifies the max for the left subtree, and min for the right subtree. This is true for all nodes.
• We can use duplicates too, but make sure that the equality is decided for left or for right subtree(but not both).
• The subtree is very important. Merely having root->left->data < root->data && root->right->data > root->data is **wrong, **as it does not talk about the whole tree. Root decides the min and max for right and left respectively.