Для каких сценариев предпочтительно использовать связанный список в структуре данных?

A linked list is preferably used in the following scenarios:

• When frequent insertion or deletion of elements in the middle of the collection is required, as insertion and deletion operations in a linked list are performed in O(1) if the node's position is known.
• When the size of the collection changes dynamically and is unknown in advance.
• When memory efficiency is important when working with large volumes of data, as a linked list does not require allocating a large contiguous block of memory, unlike arrays.

However, a linked list is not suitable for quick index-based access, as accessing an element by position requires sequential traversal.

Example of creating a simple linked list in Python:

class Node:
    def __init__(self, data):
        self.data = data
        self.next = None

class LinkedList:
    def __init__(self):
        self.head = None

    def append(self, data):
        new_node = Node(data)
        if not self.head:
            self.head = new_node
            return
        last = self.head
        while last.next:
            last = last.next
        last.next = new_node

Thus, a linked list is convenient for dynamic structures with frequent modifications, where the efficiency of insertion and deletion is important.