All Hard Articles
Print all permutations of a number N greater than itself
Given a number N, our task is to print those permutations of integer N which are greater than N.Examples:   Input: N = 534 Output: 543Input: N… Read More
permutation
Combinatorial
DSA
Mathematical
Implementation of Artificial Neural Network for XOR Logic Gate with 2-bit Binary Input
Artificial Neural Network (ANN) is a computational model based on the biological neural networks of animal brains. ANN is modeled with three types of layers:… Read More
Neural Network
python
Machine Learning
Count of distinct possible strings after performing given operations
Given a numeric string S consisting of only three types of characters 0, 1, and 2 initially and following two operations:   The occurrence of two… Read More
Competitive Programming
DSA
Dynamic Programming
Strings
Count of subarrays which contains a given number exactly K times
Given an array A[] of N elements consisting of values from 1 to N with duplicates, the task is to find the total number of… Read More
frequency-counting
subarray
Arrays
Competitive Programming
DSA
Mathematical
Minimum side of square embedded in Regular polygon with N sides
Given an even number N which represents the number of sides of a regular polygon with N vertices, the task is to find the square… Read More
square-rectangle
Competitive Programming
DSA
Geometric
Mathematical
Find dependencies of each Vertex in a Directed Graph
Given a directed graph containing N vertices and M edges, the task is to find all the dependencies of each vertex in the graph and… Read More
DFS
Arrays
Competitive Programming
DSA
Graph
Matrix
Count of subsequences of length atmost K containing distinct prime elements
Given an array arr of length N and an integer K, the task is to count the number of possible subsequences of length at most… Read More
frequency-counting
Prime Number
sieve
subsequence
Arrays
Competitive Programming
DSA
Dynamic Programming
Mathematical
Number of ways of cutting a Matrix such that atleast one cell is filled in each part
Given an integer K and a matrix mat[][] containing 1 and 0, where 1 denotes the cell is filled and 0 denotes an empty cell.… Read More
prefix-sum
DSA
Dynamic Programming
Matrix
MongoDB All Positional Operator ($[])
MongoDB All Positional Operator allows bulk updates to all elements in an array field that matches the given query condition. All Positional Operators in MongoDBThe… Read More
MongoDB-operators
MongoDB
Count of K-countdowns in an Array
Given an array arr[] of length N and a number K, the task is to count the number of K-countdowns in the array.   A contiguous… Read More
permutation
series
subarray
Arrays
DSA
Pattern Searching
Postman Online Round for Internship
Round 1:Online Round On Hackerearth It consist of 17 MCQ and 3 coding Question . A total of 90 mins were given for both the MCQ… Read More
Marketing
Postman
Experiences
Internship
Interview Experiences
Sum of cost of all paths to reach a given cell in a Matrix
Given a matrix grid[][] and two integers M and N, the task is to find the sum of cost of all possible paths from the… Read More
DSA
Dynamic Programming
Mathematical
Matrix
Python – Create window button in GTK+ 3
GTK+ 3 is a free and open-source cross-platform widget toolkit for creating graphical user interfaces (GUIs). It is licensed under the terms of the GNU… Read More
Python-GTK
Python-gui
Python
Write From Home
Minimum difference between any two weighted nodes in Sum Tree of the given Tree
Given a tree of N nodes, the task is to convert the given tree to its Sum Tree(including its own weight) and find the minimum… Read More
Algorithms
Arrays
Competitive Programming
Data Structures
DSA
Tree
Create Find and Replace features in Tkinter Text Widget
Prerequisites: Python GUI – tkinterFirstly we need to find all the words or letters that we want to replace in our below text for that… Read More
Picked
Python-tkinter
Python
Count the Frequency of elements in a Numeric Vector – tabulate() Function
tabulate() function in R Language is used to count the frequency of occurrence of a element in the vector. This function checks for each element… Read More
R Vector-Function
R Language
tf.transpose() function in TensorFlow
tf.transpose() is a function provided in TensorFlow. This function is used to transpose the input tensor. Syntax: tf.transpose(input_tensor, perm, conjugate) Parameters: input_tensor: as the name… Read More
python
Tensorflow
Machine Learning
Ackermann’s function using Dynamic programming
Given two non-zero integers M and N, the problem is to compute the result of the Ackermann function based on some particular equations.  Ackermann function… Read More
Analysis of Algorithms
DSA
Dynamic Programming
Mathematical
Recursion
ByteArrayInputStream read() method in Java with Examples
The read() method of ByteArrayInputStream class in Java is used in two ways: 1. The read() method of ByteArrayInputStream class in Java is used to… Read More
Java-Functions
Java-IO package
Java
Node.js querystring.parse() Method
The querystring.parse() method is used to parse a URL query string into an object that contains the key and pair values of the query URL.… Read More
Node.js- querystring-Module
Node.js
Web Technologies
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