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Toggle bits of a number except first and last bits

Given a number, the task is to toggle bits of the number except the first and the last bit.Examples: Input : 10 Output : 12… Read More

Bit Magic

DSA

Reverse a doubly linked list in groups of given size

Given a doubly linked list containing n nodes. The problem is to reverse every group of k nodes in the list. Examples: Prerequisite: Reverse a… Read More

doubly linked list

Reverse

DSA

Linked List

Longest palindrome subsequence with O(n) space

Given a sequence, find the length of the longest palindromic subsequence in it. Examples: Input : abbaab Output : 4 Input : geeksforgeeks Output :… Read More

palindrome

subsequence

DSA

Dynamic Programming

Misc

Strings

PHP Cookies

A cookie in PHP is a small file with a maximum size of 4KB that the web server stores on the client computer. They are… Read More

PHP-session

PHP

Web Technologies

Rearrange a linked list in to alternate first and last element

Given a linked list. arrange the linked list in manner of alternate first and last element. Examples: Input : 1->2->3->4->5->6->7->8 Output :1->8->2->7->3->6->4->5 Input :10->11->15->13 Output… Read More

cpp-deque

deque

DSA

Linked List

PHP | Sessions

What is a session? In general, session refers to a frame of communication between two medium. A PHP session is used to store data on… Read More

PHP

Web Technologies

JavaScript Array find() function

JavaScript arr.find() function is used to find the first element from the array that satisfies the condition implemented by a function. If more than one… Read More

javascript-array

javascript-functions

JavaScript

Web Technologies

Water Connection Problem

Every house in the colony has at most one pipe going into it and at most one pipe going out of it. Tanks and taps… Read More

DFS

Competitive Programming

DSA

Graph

Greedy

Calculate range of data types using C++

C++ program for printing the range data type like int, char, short. Signed Data Types METHOD 1.) calculate total number of bits by multiplying sizeof… Read More

cpp-data-types

cpp-puzzle

C++

C++ Programs

Count of number of given string in 2D character array

Given a 2-dimensional character array and a string, we need to find the given string in a 2-dimensional character array, such that individual characters can… Read More

DSA

Matrix

Pattern Searching

Strings

Practice Set for Recurrence Relations

Prerequisite – Analysis of Algorithms | Set 1, Set 2, Set 3, Set 4, Set 5 Que-1. Solve the following recurrence relation? T(n) = 7T(n/2)… Read More

Analysis of Algorithms

DSA

GATE CS

Misc

Generating regular expression from Finite Automata

Prerequisite – Introduction of FA, Regular expressions, grammar and language, Designing FA from Regular Expression There are two methods to convert FA to the regular… Read More

GATE CS

Theory of Computation

Why we should avoid using std::endl

It is a common practice to use std::endl to print newlines while using cout. For small programs with very little I/O operations this practice is… Read More

cpp-input-output

C++

Ludic Numbers

Ludic numbers are obtained by considering list of natural numbers (starting from 2) and removing i-th number in i-th iteration (where i begins with 2).… Read More

Java-ArrayList

series

DSA

Mathematical

Bash program to check if the Number is a Palindrome

Given a number num, find whether the given number is palindrome or not using Bash Scripting. Examples: Input : 666 Output : Number is palindrome… Read More

palindrome

Shell Script

Linux-Unix

fork() to execute processes from bottom to up using wait()

fork() system call is used to create a process generally known as child process and the process that created it is known as parent process.… Read More

system-programming

C++

Toggle all even bits of a number

Given a number, the task is to Toggle all even bit of a numberExamples: Input : 10 Output : 0 binary representation 1 0 1… Read More

Bitwise-XOR

Bit Magic

DSA

Number of terms in Geometric Series with given conditions

A geometric progression is a sequence of integers b1, b2, b3, …, where for each i > 1, the respective term satisfies the condition bi… Read More

series

Competitive Programming

DSA

Mathematical

Misc

Difference between Byte stuffing and Bit stuffing

Data link layer is responsible for something called Framing, which is the division of a stream of bits from the network layer into manageable units… Read More

Computer Networks

Difference Between

GATE CS

Palindromic Selfie Numbers

Given a number x, find it’s palindromic selfie number according to selfie multiplicative rule. If such a number doesn’t exist, then print “No such number… Read More

java-hashset

palindrome

permutation

Algorithms

Combinatorial

DSA

Mathematical

Misc