What are deque algorithms and how do they work?

What are deque algorithms and how do they work?

Deque algorithms involve operations on double-ended queues, allowing insertion and deletion from both ends.

Can you give me an example of how to implement a deque in Python?

Sure! You can use the collections.deque class in Python. Here's a simple example:

from collections import deque

d = deque()
d.append(1)  # Add to the right

d.appendleft(2)  # Add to the left
print(d)  # Output: deque([2, 1])

What are some common use cases for deques?

Deques are commonly used in scenarios like task scheduling, breadth-first search in graphs, and implementing queues with fast access.

How do deques compare to regular queues and stacks?

Deques allow insertion and deletion from both ends, while queues are FIFO and stacks are LIFO, making deques more versatile.