Reverse Polish notation (RPN) is a mathematical notation in which operators follow their operands. It is also known as postfix notation. In RPN, the operator is placed after the operands, unlike infix notation (traditional mathematical notation) where the operator is placed between the operands. For example, in infix notation, the expression 2 + 3 is …
What is a Linked List? A Linked List is a very commonly used linear data structure that consists of a group of nodes in a sequence. Each node holds its data and the address of the next node hence forming a chain-like structure. Concept of linked list You have to start somewhere, so we give …
Data Structures and Algorithms GO TO COURSE NEXT Data structures and Algorithms (DSA) in Computer Science It is believed that data structures and algorithms are the basics of computer science. It is actual computer science. Any developer or CS student must write code that provides a required output. Algorithms are methods to implement certain tasks …
Previous Next Tree Tree can be defined as a collection of entities (nodes) linked together to simulate a hierarchy. Some Terminology That Is Used In Tree NODE Each data item in a tree. degree of node The total numvber of childeren associated with a nodes. degree of a tree Highest child of a node in …
Time Complexity and Space Complexity Previous Next How do you do “measure” your code? Would you clock “how long” it takes to run? What if you are running the same program on a mobile device or a quantum computer? The same code will give you different results. To answer these questions, we need to nail …
QUEUES Previous Next Types Of Queue In Data Structure (Queue Variations) The standard queue data structures have the following variations: Simple Queue (Queue) Double-ended Queue (deque) Circular Queue Priority Queue What Is The Queue And How It Differs From The Stack We can also say that a queue is a sequentially ordered list where insertions …
Expression Parsing (Infix, Prefix and Postfix) Previous Next Any arithmetic expression can be written in three different but equal notations, i.e. without modifying an expression’s meaning or output. Those notations are − Infix Notation Prefix (Polish) Notation Postfix (Reverse-Polish) Notation Expression Parsing There are 3 types of notation we read in the first paragraph. We will read …
Stack Previous Next Before going to the stack, we will read the enclosure of Abstract Data Types (ADT) extensively. What is ADT, what methods come in it and which stack is used? At the same time, we will also read and understand the functionality of each method of Abstract Data Types. What is an Abstract …
Array Previous Next . What is an Array? An array is a collection of similar data types that store items in contiguous memory locations. It is also known as the Subscripted variable. Arrays are very powerful data structures that store lists of elements Arrays are classified as Homogeneous Data Structures because they store elements of …
Introduction to Data Structures and Algorithms Previous Next Why Data Structures ? They help to manage and save the data in a structured form. Data Structures(DS) help to organization of data needed to solve the problem. DS make code cleaner and easier to understand. They make a difference between “OK” program and “OUTSTANDING” program Definition …
