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The following content is based on notes taken from a study session. It has been reorganized for clarity and understanding. Singly Linked List Node structure for a singly linked list: class Node<V> { V value; Node next; } Node structure for a doubly linked list: class Node<V> { V value; Node next; Node prev; } ...

Applicable Scenarios Offline problems where expanding intervals is easier to maintain than shrinking. Variants exist for "remove-only" Mo's algorithm. Example Problem: P5906 [Template] Rollback Mo's Algorithm Given an array, process multiple queries to find the maximum distance between two equal elements within a given interval. Con ...

Head PointerThe head pointer serves as the entry point to a linked list. It is a variable that stores the memory address of the first node in the chain. Whether the list is empty or populated, the head pointer itself must exist. It allows the program to locate the start of the data structure, enabling traversal, insertion, and deletion operatio ...

Static Linked Lists Instead of using dynamic memory allocation with pointers, we can simulate linked lists using arrays. This approach is often faster and avoids memory overhead. The core idea involves maintaining an array for values and an array for indices (acting as pointers). For a singly linked list, we maintain a head index and an idx cou ...

A linked list organizes elements using non-contiguous memory blocks. Each node holds a data field and a pointer to the next node, forming a chain. The basic structure is defined as follows: typedef struct SNode { int value; struct SNode *next; } SNode, *SList; Headless List Operations Operations on lists without a dummy head node requi ...

Node Structure Definition A singly linked list is constructed as a sequence of nodes, where each node contains a data field and a pointer to the subsequent node. The following structure defines a node with an integer identifier and a text label. typedef struct ListNode { int id; char description[32]; struct ListNode* next; } ListNod ...

Linked List Structure A linked list organizes data in a linear sequence using nodes. Each node contains a data element and a pointer to the subsequent node. The initial node is called the head. Variants of Linked Lists Singly Linked List Nodes contain a single pointer to the next node. Doubly Linked List Nodes maintain two pointers: one to the ...

A linked list is a collection of nodes, where each node stores a value and a reference to the successor. The following definition captures that structure: class Cell { int data; Cell next; Cell(int data) { this.data = data; this.next = null; } @Override public String toString() { StringBuilder s ...

Linked queues and circular queues represent two fundamental approaches to implementing the queue data structure, each offering distinct advantages suited to specific computational problems.Linked Queue ImplementationA linked queue utilizes a linked list structure where elements are added at the rear and removed from the front. This implementati ...

For removing nodes with a given value, using a sentinel node avoids handling the head as a special case. A pointer starts at the sentinel and examines each successor, unlinking any node whose data matches the target. class Solution: def removeElements(self, head: Optional[ListNode], target: int) -> Optional[ListNode]: sentinel = ...