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 
In this exercise, you are required to sum two linked lists and return the sum embedded in another linked list. 

The first number that we append to the linked list represents the unit place and will be the least significant digit of a number. The next numbers appended to the linked list will subsequently represent the *tenth*, *hundredth*, *thousandth*, and so on places. 

For example, 
```
llist1 = LinkedList()
llist1.append(5)
llist1.append(6)
llist1.append(3)
```
in the code above, `llist1` represents the number `365`.  

Note that you will not be tested on numbers whose sum requires an additional digit. 

Below is an illustration to make the task clearer to you:


# Problem 
In this exercise, you are required to sum two linked lists and return the sum embedded in another linked list. 

The first number that we append to the linked list represents the unit place and will be the least significant digit of a number. The next numbers appended to the linked list will subsequently represent the *tenth*, *hundredth*, *thousandth*, and so on places. 

For example, 
```
llist1 = LinkedList()
llist1.append(5)
llist1.append(6)
llist1.append(3)
```
in the code above, `llist1` represents the number `365`.  

Note that you will not be tested on numbers whose sum requires an additional digit. 

Below is an illustration to make the task clearer to you:


Challenge yourself with the following exercise in which you'll sum up two linked lists!

Introduction

Stack

Singly Linked Lists

Circular Linked Lists

Doubly Linked Lists

Arrays

Binary Trees

Binary Search Trees

Binary Search

Recursion

String Processing

Exercise: Sum Two Linked Lists

Problem #