#data-structures

data_usage What is the difference between a HashSet and a TreeSet in Java?

Both HashSet and TreeSet are two important classes in Java's Collection Framework that are used to store a collection of elements, but there are some... Read more

code What is the difference between the HashMap and Hashtable classes in Java?

In Java, both HashMap and Hashtable are used to store and manipulate key-value pairs. However, there are some key differences between the two... Read more

storage What is the difference between the ArrayList and LinkedList data structures in Java?

ArrayList and LinkedList are both data structures in Java that can store collections of objects. However, they differ in the way they store and... Read more

storage What is a data structure in programming?

In programming, a data structure is a way of organizing and storing data so that it can be accessed and manipulated efficiently. Data structures... Read more

school What are some useful resources for IOI preparation?

The International Olympiad in Informatics (IOI) is an annual competitive programming competition for high school students. To excel in IOI, one must... Read more

device_hub How do you work with trees in programming?

In computer science, trees are a type of data structure commonly used in programming. A tree is a collection of nodes, each of which has a parent and... Read more

storage What is the difference between a stack and a queue in Java?

Stack and Queue are two important data structures in computer programming. Both these data structures are used to store a collection of elements, but... Read more

unfold_more What is a linked list in programming?

A linked list is a linear data structure that is used to store elements of different data types. It is made up of nodes, where each node contains a... Read more

list_alt How do you work with arrays in programming?

Arrays are a common data type used in programming languages to store and organize data.To work with arrays, you first need to declare and initialize... Read more

code How can you practice implementing algorithms and data structures for the IOI competition?

The International Olympiad in Informatics (IOI) is a prestigious programming competition for high school students from around the world. If you're... Read more