해커랭크

A Java interface can only contain method signatures and fields. The interface can be used to achieve polymorphism. In this problem, you will practice

Generic methods are a very efficient way to handle multiple datatypes using a single method. This problem will test your knowledge on Java Generic met

Comparators are used to compare two objects. In this challenge, you'll create a comparator and use it to sort an array.The Player class is provided fo

문제 Sometimes it's better to use dynamic size arrays. Java's Arraylist can provide you this feature. Try to solve this problem using Arraylist. You ar

This exercise focuses on traversing a linked list. You are given a pointer to the node of a linked list. The task is to print the of each node, one

Given a pointer to the head of a linked list, insert a new node before the head. The next value in the new node should point to head and the data valu

You are given the pointer to the head node of a linked list and an integer to add to the list. Create a new node with the given integer. Insert this n

Given a pointer to the head node of a linked list and an integer to insert at a certain position, create a new node with the given integer as its data

Delete the node at a given position in a linked list and return a reference to the head node. The head is at position 0. The list may be empty after y

Given pointers to the heads of two sorted linked lists, merge them into a single, sorted linked list. Either head pointer may be null meaning that the

알아야할 개념참조를 하는 Node만 참조된 Node에 영향을 미친다.즉, SinglyLinkedListNode nextTemp = current.next; 이 코드에서 nextTemp의 값을 변화시키면 current.next의 값이 변하지만, current.next 값

stack 선언 방법 : Stack<> stk = new Stack<>();stack 주요 함수 : .push() / .pop() / .peek()