C++ Programs - Hard Articles

Draw an ellipse using OpenCV in C++

In this article, the task is to draw an ellipse using OpenCV in C++. The ellipse() function from OpenCV C++ library will be used. Syntax:… Read More

computer-graphics

OpenCV

C++

C++ Programs

Taking password as input in C++

There are two methods in which input can be taken in a more secure way: Do not display any content. Display a special character such… Read More

cpp-input-output

Input and Output

C++

C++ Programs

Misc

Programming Language

Print distinct absolute differences of all possible pairs from a given array

Given an array, arr[] of size N, the task is to find the distinct absolute differences of all possible pairs of the given array. Examples:… Read More

Arrays

C++ Programs

Competitive Programming

CS - Placements

DSA

Mathematical

Searching

Mouse Programming in C/C++

Till now we have seen only static output on the black window in C/C++ without any peripheral device interaction(like mouse). Here static means that interaction… Read More

Articles

C Language

C Programs

C++

C++ Programs

Experienced

Experiences

Print all root to leaf paths of an N-ary tree

Given an N-Ary tree, the task is to print all root to leaf paths of the given N-ary Tree. Examples: Input: … Read More

DFS

n-ary-tree

Tree Traversals

Backtracking

C++ Programs

DSA

Recursion

Searching

Tree

Implementing Interactive Online Shopping in C++

Online shopping is all about calculating the total amount for the items selected by the customer. In this article, we will discuss a menu-driven C++… Read More

Project-Ideas

Technical Scripter 2020

C++

C++ Programs

Project

Technical Scripter

Maximize cost to empty given array by repetitively removing K array elements

Given an array, arr[] of size N and an integer K ( N % K = 0), the task is find the maximum cost to… Read More

array-rearrange

Arrays

C++ Programs

DSA

Greedy

Sorting

Strings

Minimum score possible for a player by selecting one or two consecutive array elements from given binary array

Given a binary array arr[] of size N and two players, A and B. The task is to minimize the score for player A by… Read More

cpp-map

Advanced Data Structure

Algorithms

Arrays

C++ Programs

Competitive Programming

DSA

Dynamic Programming

Game Theory

Recursion

Count pairs whose product contains single distinct prime factor

Given an array arr[] of size N, the task is to count the number of pairs from the given array whose product contains only a… Read More

combinatorics

number-theory

Prime Number

prime-factor

Algorithms

Arrays

C++ Programs

Combinatorial

Competitive Programming

DSA

Hash

Mathematical

Searching

Merge two sorted arrays in O(1) extra space using Heap

Given two sorted arrays, arr[], brr[] of size N, and M, the task is to merge the two given arrays such that they form a… Read More

C++ Programs

Divide and Conquer

DSA

Experiences

Heap

Interview Experiences

Sorting

Generate a combination of minimum coins that sums to a given value

Given an array arr[] of size N representing the available denominations and an integer X. The task is to find any combination of the minimum… Read More

dp-coin-change

Permutation and Combination

Backtracking

C++ Programs

Combinatorial

DSA

Dynamic Programming

Mathematical

Recursion

Check if a palindromic matrix can be formed from the given array elements

Given an array arr[] consisting of N2 integers, the task is to check whether a matrix of dimensions N * N can be formed from… Read More

Algorithms

C++ Programs

Competitive Programming

DSA

Balanced Ternary Number System

As we already know, a Binary number system is a number system that has only 2 digits in it, i.e. 0 and 1. Similarly, we… Read More

number-theory

C++ Programs

Digital Logic

DSA

Mathematical

Print the Vowels in the Order of their occurrence in the given Matrix

Given a character matrix arr[][] of dimensions 3 * N, consisting of three characters {#, *, . }, the task is to find the vowels(A,… Read More

interview-preparation

TCS-coding-questions

C++ Programs

DSA

Matrix

Pattern Searching

Searching

Strings

Represent Tree using graphics in C/C++

Prerequisite: graphics.h, How to include graphics.h? In C/C++ there is graphics.h header file which is used to create the object like line, circle, etc. Given an… Read More

computer-graphics

Trees

C++ Programs

DSA

Tree

Queries to count characters having odd frequency in a range [L, R]

Given a string S of length N, consisting of lower case alphabets, and queries Q[][] of the form [L, R], the task is to count… Read More

array-range-queries

Bitwise-XOR

frequency-counting

prefix-sum

Arrays

Bit Magic

C++ Programs

Competitive Programming

DSA

Greedy

Mathematical

Find the pair (a, b) with minimum LCM such that their sum is equal to N

Given a number N, the task is to find two numbers a and b such that a + b = N and LCM(a, b) is… Read More

GCD-LCM

number-theory

Algorithms

C++ Programs

Competitive Programming

DSA

Mathematical

Program to insert dashes between two adjacent odd digits in given Number

Given a large number in form of string N, the task is to insert a dash between two adjacent odd digits in the given number… Read More

CPP-regex

java-regular-expression

number-digits

regular-expression

C++ Programs

DSA

Pattern Searching

Strings

Exit codes in C/C++ with Examples

The purpose of the exit() function is to terminate the execution of a program. The “return 0”(or EXIT_SUCCESS) implies that the code has executed successfully… Read More

C Language

C Programs

C++

C++ Programs

N-Queen Problem | Local Search using Hill climbing with random neighbour

The N Queen is the problem of placing N chess queens on an N×N chessboard so that no two queens attack each other. For example, the… Read More

chessboard-problems

Arrays

Backtracking

C++

C++ Programs

DSA

Mathematical