All Hard Articles

Maximum sum of a Matrix where each value is from a unique row and column

Given a matrix of size N X N, the task is to find maximum sum of this Matrix where each value picked is from a… Read More

DSA

Matrix

Strings

Find a N-digit number such that it is not divisible by any of its digits

Given an integer N, the task is to find an N-digit number such that it is not divisible by any of its digits.Note: There can… Read More

Algorithms

DSA

Mathematical

Pattern Searching

Programming Language

Minimize the maximum difference between adjacent elements in an array

Given a non-decreasing array arr[] and an integer K, the task is to remove K elements from the array such that maximum difference between adjacent… Read More

deque

Algorithms

Analysis of Algorithms

Arrays

Competitive Programming

Data Structures

DSA

Greedy

Queue

Find minimum value of the expression by choosing K elements from given array

Given an array of integers arr of size N, the task is to find the minimum possible of the expression by choosing exactly K(? N)… Read More

math

Algorithms

Competitive Programming

DSA

Greedy

Mathematical

Introduction to Mercurial

Mercurial is a popular distributed version control system, that offers way to archive as well as to save older versions of source code. Mercurial came… Read More

Open Source

Git

Software Engineering

find_elements_by_name() driver method – Selenium Python

Selenium’s Python Module is built to perform automated testing with Python. Selenium Python bindings provides a simple API to write functional/acceptance tests using Selenium WebDriver.… Read More

Python-selenium

selenium

Python

Count of distinct XORs formed by rearranging two Binary strings

Given two binary strings A and B of equal length N, the task is to find the number of distinct XORs possible by arbitrarily reordering… Read More

array-rearrange

binary-string

Bitwise-XOR

Permutation and Combination

Algorithms

Arrays

Bit Magic

Combinatorial

Data Structures

DSA

Mathematical

Strings

Write From Home

Find numbers that divide X and Y to produce the same remainder

Given two integers X and Y, the task is to find and print the numbers that divide X and Y to produce the same remainder.Examples: … Read More

factor

number-digits

DSA

Mathematical

Check whether a number can be represented as difference of two squares

Given a number N, the task is to check if this number can be represented as the difference of two perfect squares or not. Examples: … Read More

maths-perfect-square

number-digits

DSA

Mathematical

Expectimax Algorithm in Game Theory

The Expectimax search algorithm is a game theory algorithm used to maximize the expected utility. It is a variation of the Minimax algorithm. While Minimax… Read More

Algorithms

DSA

Game Theory

Recursion

Count the number of ways to divide N in k groups incrementally

Given two integers N and K, the task is to count the number of ways to divide N into K groups of positive integers such… Read More

Algorithms

Competitive Programming

DSA

Dynamic Programming

Mathematical

Recursion

Python – sys.settrace()

Python sys module provides some of the powerful functions but they are complex to understand. One of which is the sys.settrace() which is used for… Read More

python-modules

Python

Number of ways to construct a new string from the characters of the given array of string

Content Removed

Algorithms

Arrays

Competitive Programming

Data Structures

DSA

Dynamic Programming

Recursion

Strings

Geeks Summer Carnival – A Virtual Fun Festival For Coders

The season of Summer has already arrived and so the most exciting period of the year too! Indeed, summer always comes with a new wave… Read More

GFG-Update

GBlog

Find four elements that sum to a given value | Two-Pointer approach

Given an array arr of integers of size N and a target number, the task is to find all unique quadruplets in it, whose sum… Read More

two-pointer-algorithm

Algorithms

Arrays

DSA

Matplotlib.pyplot.draw() in Python

Matplotlib is a library in Python and it is numerical – mathematical extension for NumPy library. Pyplot is a state-based interface to a Matplotlib module… Read More

Python-matplotlib

Python

Matplotlib.axes.Axes.grid() in Python

Matplotlib is a library in Python and it is numerical – mathematical extension for NumPy library. The Axes Class contains most of the figure elements:… Read More

Python-matplotlib

Python

Port Address Translation (PAT) mapping to Private IPs

In this article we will be learning how exactly a Home network works. In the beginning we should keep in mind that when we connect… Read More

Computer Networks

Difference between SCAN and LOOK Disk scheduling algorithms

SCAN disk scheduling algorithm: In SCAN disk scheduling algorithm, head starts from one end of the disk and moves towards the other end, servicing requests… Read More

Picked

Difference Between

GATE CS

Operating Systems

Write From Home

Matplotlib.pyplot.subplots_adjust() in Python

Matplotlib is a library in Python and it is numerical – mathematical extension for NumPy library. Pyplot is a state-based interface to a Matplotlib module… Read More

Python-matplotlib

Python