Скачать или смотреть Deque in python data structure| Explained with Examples |II PUC

In this video, we’ll learn about a powerful data structure called the Deque — short for Double-Ended Queue.


🔍 What is a Deque?

A Deque is a special type of queue where insertion and deletion can happen at both ends — the front and the rear. That’s why it’s called a double-ended queue.

Think of it like a line of people where:

Some can enter or leave from the front,

Others can enter or leave from the back!


🧱 Types of Deque:

1. Input-Restricted Deque – Insertion only at one end, deletion from both.


2. Output-Restricted Deque – Deletion only at one end, insertion from both.



⚙️ Operations in a Deque:

insertFront() – Add element at the front

insertRear() – Add element at the rear

deleteFront() – Remove element from the front

deleteRear() – Remove element from the rear

getFront() – Get front element

getRear() – Get rear element

isEmpty() – Check if deque is empty

isFull() – Check if deque is full


📦 Real-Life Examples:

Browser history (forward and backward navigation)

Palindrome checking

Task scheduling

💡 Key Takeaway:
A deque combines the flexibility of both stacks and queues. It gives you more control over where elements are added or removed.

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