How can I implement advanced queue and stack data structures?

How can I implement advanced queue and stack data structures?

You can implement advanced queue and stack data structures using linked lists or arrays. Would you like a code example?

Yes, please provide a code example for a priority queue.

Here's a simple implementation of a priority queue in Python using a list:

class PriorityQueue:
    def __init__(self):
        self.elements = []

    def is_empty(self):
        return not self.elements

    def put(self, item, priority):
        self.elements.append((priority, item))
        self.elements.sort(reverse=True)

    def get(self):
        return self.elements.pop()[1]

What about implementing a stack with linked lists?

You can implement a stack using a linked list like this:

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

class Stack:
    def __init__(self):
        self.top = None

    def push(self, value):
        new_node = Node(value)
        new_node.next = self.top
        self.top = new_node

    def pop(self):
        if self.top is None:
            return None
        popped_value = self.top.value
        self.top = self.top.next
        return popped_value