In this article, we will learn what is graph structured stack and how to implement it in a C++ program. What is Graph Structured Stack? Graph structured stack is a directed acyclic graph, where each directed path represents a stack. In this types of stack, the flow of execution is not linear like a traditional stack, instead the flow is represented using a graph structure. Each node in the graph can represent a function call or a state, and the edges define possible transitions or calls. This type of stacks are useful in advanced control flow handling like backtracking, ... Read More

DAG stands for Directed Acyclic Graph. It is a special type of graph where all edges are directed and there are no cyclic connections of edges. In this article, we will discuss how to check whether a graph is a DAG using Kahn’s algorithm (BFS based topological sorting). What is DAG? A DAG is a directed graph with no cycles. That means in this type graph it is not possible to start from any node and follow a sequence of edges such that you will return back to the starting node. DAGs are commonly used in applications like task ... Read More

The day of the year for a particular LocalDateTime can be obtained using the getDayOfYear() method in the LocalDateTime class in Java. This method requires no parameters and it returns the day of the year which can be in the range of 1 to 365 and also 366 for leap years.A program that demonstrates this is given as follows −Example Live Demoimport java.time.*; public class Demo {    public static void main(String[] args) {       LocalDateTime ldt = LocalDateTime.parse("2019-02-18T11:30:15");       System.out.println("The LocalDateTime is: " + ldt);       System.out.println("The day of the year is: " + ... Read More

The hour of the day for a particular LocalDateTime can be obtained using the getHour() method in the LocalDateTime class in Java. This method requires no parameters and it returns the hour of the day which can range from 0 to 23.A program that demonstrates this is given as follows −Example Live Demoimport java.time.*; public class Demo {    public static void main(String[] args) {       LocalDateTime ldt = LocalDateTime.parse("2019-02-18T15:28:35");       System.out.println("The LocalDateTime is: " + ldt);       System.out.println("The hour is: " + ldt.getHour());    } }OutputThe LocalDateTime is: 2019-02-18T15:28:35 The hour is: 15Now let ... Read More

The year for a particular LocalDateTime can be obtained using the getYear() method in the LocalDateTime class in Java. This method requires no parameters and it returns the year which can range from MIN_YEAR to MAX_YEAR.A program that demonstrates this is given as follows −Example Live Demoimport java.time.*; public class Demo {    public static void main(String[] args) {       LocalDateTime ldt = LocalDateTime.parse("2019-02-18T15:28:35");       System.out.println("The LocalDateTime is: " + ldt);       System.out.println("The year is: " + ldt.getYear());    } }OutputThe LocalDateTime is: 2019-02-18T15:28:35 The year is: 2019Now let us understand the above program.First the ... Read More

The equality of two LocalDateTime objects can be determined using the equals() method in the LocalDateTime class in Java. This method requires a single parameter i.e. the LocalDateTime object to be compared. Also it returns true if both the LocalDateTime objects are equal and false otherwise.A program that demonstrates this is given as follows −Example Live Demoimport java.time.*; public class Main {    public static void main(String[] args) {       LocalDateTime ldt1 = LocalDateTime.parse("2019-02-18T23:15:30");       LocalDateTime ldt2 = LocalDateTime.parse("2019-02-18T23:15:30");       System.out.println("The LocalDateTime ldt1 is: " + ldt1);       System.out.println("The LocalDateTime ldt2 is: " ... Read More

An immutable copy of a LocalDateTime with the nanoseconds altered as required is done using the method withNano() in the LocalDateTime class in Java. This method requires a single parameter i.e. the nanosecond that is to be set in the LocalDateTime and it returns the LocalDateTime with the nanosecond altered as required.A program that demonstrates this is given as follows −Example Live Demoimport java.time.*; public class Main {    public static void main(String[] args) {       LocalDateTime ldt1 = LocalDateTime.parse("2019-02-18T23:15:30");       System.out.println("The LocalDateTime is: " + ldt1);       LocalDateTime ldt2 = ldt1.withNano(5);       ... Read More

An immutable copy of a LocalDateTime object where some weeks are added to it can be obtained using the plusWeeks() method in the LocalDateTime class in Java. This method requires a single parameter i.e. the number of weeks to be added and it returns the LocalDateTime object with the added weeks.A program that demonstrates this is given as follows −Example Live Demoimport java.time.*; public class Demo {    public static void main(String[] args) {       LocalDateTime ldt = LocalDateTime.now();       System.out.println("The current LocalDateTime is: " + ldt);       System.out.println("The LocalDateTime with 4 weeks added is: ... Read More

An immutable copy of a LocalTime object where some seconds are subtracted from it can be obtained using the minusSeconds() method in the LocalTime class in Java. This method requires a single parameter i.e. the number of seconds to be subtracted and it returns the LocalTime object with the subtracted seconds.A program that demonstrates this is given as follows −Example Live Demoimport java.time.*; public class Demo {    public static void main(String[] args) {       LocalTime lt = LocalTime.now();       System.out.println("The current LocalTime is: " + lt);       System.out.println("The LocalTime with 5 seconds subtracted is: ... Read More

An immutable copy of a LocalTime object where some hours are added to it can be obtained using the plusHours() method in the LocalTime class in Java. This method requires a single parameter i.e. the number of hours to be added and it returns the LocalTime object with the added hours.A program that demonstrates this is given as follows −Example Live Demoimport java.time.*; public class Demo {    public static void main(String[] args) {       LocalTime lt = LocalTime.now();       System.out.println("The current LocalTime is: " + lt);       System.out.println("The LocalTime with 3 hours added is: ... Read More