Data structures and algorithms are among the most fundamental concepts of Computer Science. Whether it’s real-world problems you’re trying to solve or the typical coding question asked in an interview, almost every problem requires you to demonstrate a deep understanding of data structures and algorithms. 

This course is a detailed review of some of the most common data structures and algorithms that you’ll see in interviews and your everyday work. With implementation details, thorough explanations, and hands-on coding exercises, you’ll quickly gain the confidence you need to solve any problem, no matter the situation.

Data Structures and Algorithms in Python

## Problem

The size of the tree is the total number of nodes in a tree. You are required to return the size of a binary tree given the root node of the tree.

Below is an example illustrated for you:

# Problem

The size of the tree is the total number of nodes in a tree. You are required to return the size of a binary tree given the root node of the tree.

Below is an example illustrated for you:

Challenge yourself with an exercise in which you'll have to calculate the size of a binary tree!

Introduction

Stack

Singly Linked Lists

Circular Linked Lists

Doubly Linked Lists

Arrays

Binary Trees

Binary Search Trees

Binary Search

Recursion

String Processing

Exercise: Calculating the Size of a Tree

Problem