PHP 7 Data Structures and Algorithms

Understanding the binary search tree

A BST is a binary tree that is built in such way that the tree is always sorted. This means the left child node has a value less than or equal to the parent node value, and right child node will have the value greater than the parent node value. So, whenever we need to search a value, either we will search left or search right. As it is sorted, we have to search one part of the tree, not both, and this continues recursively. For its dividing nature, the searching becomes very fast, and we can achieve logarithmic complexity for the search. For example, if we have n number of nodes, we will search either the first half or second half of the nodes. Once we are in the first or second half, we can divide it ...