A linked list is a non-contiguous storage structure where logical ordering is maintained through node references. It belongs to the linear data structure category. Data Field: Contains element values Pointer Field: Stores references to adjacent nodes Classification Criteria Linked lists are categori...
Deleting Nodes by Value in a Linked List A direct approach is to construct a new list containing only the nodes whoce values differ from the target. Traverse the original list, and when a node with a non-matching value is found, append it to the result. Care must be taken to terminate the new list p...
A console‑based billing system menages prepaid cards, tracks usage sessions, and supports administrator operations including rate configuration. The application stores card records in a singly linked list and administrator accounts in a dynamic array. All data is loaded from text files at startup an...
Linear structures consist of a finite sequence of elements with identical properties. Common linear data structures include arrays, linked lists, stacks, queues, and strings. While linear structures follow a continuous logical arrangement, their physical storage may be either contiguous or non-conti...
Swapping Adjacent Nodes in a Linked List The core idea involves using a dummy head node to simplify edge cases and ensure consistent operations on the first node. When swapping node pairs, careful attention must be paid to preserving references before reassigning pointers. Key considerations: Use a...
Working with singly linked lists requires a firm grasp of pointer manipulation and edge-case handling. The following sections break down three classic problems: removing nodes by value, building a custom linked list with index-based operations, and reversing a list in-place. Eliminating Nodes with a...
Linked lists are fundamental data structures that support various manipulations, including reordering elements, removing specific nodes, identifying common elements across lists, and detecting structural patterns like cycles. This document explores several common and important linked list problems,...
Problem StatementGiven the head of a singly linked list, determine whether the sequence of values reads identically forward and backward.Example 1:Input: 1 -> 2 Output: falseExample 2:Input: 1 -> 2 -> 2 -> 1 Output: trueApproach 1: Fast and Slow Pointers with In-Place ReversalThis method achieves O(...
Problem Statement Given two non-empty linked lists representing non-negative integers, where digits are stored in reverse order and each node contains a single digit, return the sum as a linked list in the same format. Algorithm Design Process both lists simultaneously from head to tail, treating ea...
This review focuses on core techniques for arrays and linked lists, including practical C++ implementations. Arrays The most important concept for array problems is the two-pointer technique. Fast and Slow Pointers When removing or manipulating elements, nested loops lead to O(n²) time complexity. U...