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Programming Articles
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Majority Element in Java
Let’s suppose we have given an array of integers. The task is to find the index of a particular element in the given array. For example, Input-1 −N = 8 A[ ] = { 1, 2, 4, 3, 3, 1, 1, 5}Output −1Explanation − In the given array of integers, the most appearing number is ‘1’. Thus the output is ‘1’.Input-2 −N = 6 A[ ] = {1, 5, 4, 4, 1, 1}Output −1Explanation − In the given array of integers, the most appearing number is ‘1’. Thus we can return the output ‘1’.Approach to solve this problemThe given array ...
Read MoreWrite a program in C++ to insert a Node at the beginning of the given Singly linked list
A linked List is a linear data structure that has multiple nodes that are connected with each other. Each node consists of two fields Data Field and address of the next node.Let us assume we have given a singly linked list the task is to insert a node at the beginning of the given linked list. For example, Input-1 − 1 → 2 → 3 → 4Insert ‘5’ at the head or beginning of the given linked list.Output − 5 → 1 → 2 → 3 → 4Explanation − After inserting the node at the beginning of the linked list ...
Read MoreWhat are pandigital numbers. Approach to find the pandigital Numbers using C++
Pandigital Number − In Mathematics, a Pandigital number is an integer that in a given base has among its significant digits each digit used in the base at least once.Pandigital numbers are the integers in which each digit is used as the base at least one time.For example, 1245678 is a pandigital number.Approach to solve this problemTake Input a number and a base.Check the base if it is less than 2 and greater than 10 then return 1 otherwise check the number if it is pandigital or not.An Integer function is_pandigital(long long n, int base) takes a number and a ...
Read MoreWrite a program in C++ to find the top K frequent element in an array of integers
Suppose we have an array of integers of size N and a key K. Our task is to print the top K most frequent element of the array. For example, Input-1 −N = 6 K = 2 arr[ ] = {1 ,1, 1, 2, 2, 3}Output −1 2Explanation − In the given array of integers, the top K=2 elements whose frequency is most in the array are {1, 2}.Input-2 −N = 2 K = 1 arr[ ] = {1, 2}Output −1Explanation − In the given array of integers, the top K=1 elements whose frequency is most in the array are ...
Read MoreWrite a program in Java to find the missing positive number in a given array of unsorted integers
Let’s suppose we have given an array of unsorted integers. The task is to find the positive missing number which is not present in the given array in the range [0 to n]. For example, Input-1 −N = 9 arr = [0, 2, 5, 9, 1, 7, 4, 3, 6]Output −8Explanation − In the given unsorted array, ‘8’ is the only positive integer that is missing, thus the output is ‘8’.Input-2 −N = 1 arr = [0]Output −1Explanation − In the given array, ‘1’ is the only one positive integer which is missing, thus the output is ‘1’.Approach to solve ...
Read MoreFind the index of the first unique character in a given string using C++
Given a string ‘s’, the task is to find the first unique character which is not repeating in the given string of characters and return its index as output. If there are no such characters present in the given string, we will return ‘-1’ as output. For example, Input-1 −s = “tutorialspoint”Output −1Explanation − In the given string “tutorialspoint”, the first unique character which is not repeating is ‘u’ which is having the index ‘1’. Thus we will return ‘1’ as output.Input-2 −s = “aaasttarrs”Output −-1Explanation − In the given string “aaasttarrs’, there are no unique characters. So, we will ...
Read MoreDetect Capital in a given string using C++
Let's suppose we have a string ‘str’ which consists of some character in it. The task is to check whether the given string has all its characters capitalized or not and return True or False respectively. For example, Input-1 −str = “INDIA”Output −TrueExplanation − Since all the character of the input string is capital, we will return true in this case.Input-2 −str = “Programmer”Output −FalseExplanation − Since all the characters of the input string are not in the capital except the first letter, we will return false in this case.The approach used to solve this problemIn the given string, we ...
Read MoreC++ Program to Delete the First Node in a given Singly Linked List
A linked list is a linear data structure that has multiple nodes that are connected with each other. Each node consists of two fields – Data Field and the address of the next node.Let us assume we have a singly linked list and we need to delete the first node from this linked list. For example, Input 1 − 4 → 3 → 2 → 1Output − 3 → 2 → 1 →Explanation − ‘4’ is the first node in the given singly linked list. After deleting the first node, the linked list will be 3→2→1.Input 2 − 1 → ...
Read MoreWhat is the difference between Java and Java EE
JSE (Java Standard Edition)By using JavaSE you can develop stand-alone application ex: adobe reader, anti-virus, media players, etc. Java SE is also known as core java.lang: Language basics.util: Collection framework, events, data structure and other utility classes such as date.io: File operations, and other input and output operations.math: Multi precision arithmetics.nio: Non-blocking I/O framework for Java.net: Classes an API’s related to networking.security: This package provides classes and interfaces such as key generation, encryption, and decryption which belongs to the security framework.sql: Classes and interfaces for accessing/manipulating the data stored in databases and data sources.awt: Classes and interfaces to create GUI ...
Read MoreHow to remove repeated column names in a data.table object in R?
In data analysis, we sometimes deal with duplicated data or just the representation of the data with same name. One such situation is column names are same for two columns in a data.table object. For this purpose, we can make use of which function with the combination of duplicated function and set the output of that duplicate to NULL to remove the repeated column names.Example1Loading data.table package and creating a data.table object −library(data.table) x1
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