All Hard Articles

Shamir’s Secret Sharing Algorithm | Cryptography

Cryptography is a technique of securing information and communications through the use of codes so that only those person for whom the information is intended… Read More

cryptography

Computer Subject

Sort an array of strings based on the given order

Given an array of strings words[] and the sequential order of alphabets, our task is to sort the array according to the order given. Assume… Read More

Algorithms

Arrays

C++ Programs

DSA

Sorting

Strings

Count all square sub-matrix with sum greater than the given number S

Given a matrix mat[][] and two integers K and S, the task is to count all K x K sub-matrix such that the sum of… Read More

submatrix

DSA

Dynamic Programming

Matrix

0/1 Knapsack Problem to print all possible solutions

Given weights and profits of N items, put these items in a knapsack of capacity W. The task is to print all possible solutions to… Read More

knapsack

Algorithms

DSA

Dynamic Programming

Mathematical

Searching

Minimum possible modifications in the matrix to reach destination

Given a matrix of size N x M consisting of integers 1, 2, 3 and 4. Each value represents the possible movement from that cell: 1… Read More

BFS

Dijkstra

Algorithms

Competitive Programming

Data Structures

DSA

Graph

Queue

Check whether two numbers are in golden ratio

Given two numbers A and B, the task is to check that A and B are in the golden ratio.Golden Ratio: Two numbers are said… Read More

DSA

Mathematical

Write From Home

Missing occurrences of a number in an array such that maximum absolute difference of adjacent elements is minimum

Given an array arr[] of some positive integers and missing occurrence of a specific integer represented by -1, the task is to find that missing… Read More

Arrays

C++

C++ Programs

Competitive Programming

CS - Placements

DI - Placements

DSA

English - Placements

Greedy

Placements

QA - Placements

Reasoning - Placements

Word Break Problem | DP-32 | Set – 2

Given a non-empty sequence S and a dictionary dict[] containing a list of non-empty words, print all possible ways to break the sentence in individual… Read More

Algorithms

DSA

Dynamic Programming

Recursion

Recursive program to find the Sum of the series 1 – 1/2 + 1/3 – 1/4 … 1/N

Given a positive integer N, the task is to find the sum of the series 1 – (1/2) + (1/3) – (1/4) +…. (1/N) using… Read More

DSA

Recursion

Difference between Python and JavaScript

In this article, we will know about Javascript & Python, the purpose of their usage, along with knowing the difference between them. Python: Python is a… Read More

JavaScript-Misc

Python-Miscellaneous

JavaScript

Python

Web Technologies

Tri-Surface Plot in Python using Matplotlib

A Tri-Surface Plot is a type of surface plot, created by triangulation of compact surfaces of finite number of triangles which cover the whole surface… Read More

Matplotlib Artist-class

Python-matplotlib

Python

Longest palindromic string formed by concatenation of prefix and suffix of a string

Given string str, the task is to find the longest palindromic substring formed by the concatenation of the prefix and suffix of the given string… Read More

Algorithms

Competitive Programming

DSA

Strings

Sum of all N-digit palindromic numbers which doesn’t contains 0 and are divisible by 9

Given a number N, the task is to find the sum of all N-digit palindromic numbers which are divisible by 9 and the number doesn’t… Read More

C++ Programs

Competitive Programming

CS - Placements

DSA

Mathematical

Sort an Array alphabetically when each number is converted into words

Given an array arr[] containing N non-negative integers, the task is to sort these integers alphabetically when each number is converted into words. Examples: Input:… Read More

lexicographic-ordering

number-digits

Arrays

DSA

Mathematical

Sorting

Strings

Stock Price Analysis With Python

Python is a great language for making data-based analyses and visualizations. It also has a wide range of open-source libraries that can be used off… Read More

AI-ML-DS With Python

Machine Learning Projects

AI-ML-DS

Machine Learning

Write From Home

Difference Between HDFS and HBase

HDFS: Hadoop Distributed File System is a distributed file system designed to store and run on multiple machines that are connected to each other as… Read More

Picked

Computer Subject

Hadoop

random.choices() method in Python

The choices() method returns multiple random elements from the list with replacement. You can weigh the possibility of each result with the weights parameter or… Read More

Python-random

Programming Language

Python

Write From Home

Maximize product of digit sum of consecutive pairs in a subsequence of length K

Given an array of integers arr[], the task is to maximize the product of the digit sum of every consecutive pair in a subsequence of… Read More

number-digits

subsequence

Arrays

DSA

Dynamic Programming

Mathematical

Recursion

MongoDB – $mul Operator

MongoDB $mul or multiple operator is a type of field update operator. $mul operator multiplies the value of the field by a number. Important Points$mul… Read More

MongoDB

MongoDB-operators

MongoDB

MongoDB – Field Update Operators

MongoDB provides different types of field update operators to update the values of the fields of the documents that matches the specified condition. The following… Read More

MongoDB

MongoDB-operators

MongoDB