Tag: Queue
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LeetCode: 232 Implement Queue using Stacks
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LeetCode: 232 Implement Queue using Stacks Implement a first in first out (FIFO) queue using only two stacks. The implemented queue should support all the functions of a normal queue (push, pop, peek, empty). push(x) — Pushes element x to the back of the queue. pop() — Removes the element…
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Algorithms 101: How Python Implements a Queue Behind the Scenes
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How Python Implements a Queue Behind the Scenes In Python, a queue is not a built-in data structure with a dedicated implementation like in some other programming languages. Instead, Python offers several ways to implement a queue, with the most common being through the collections.deque (double-ended queue) class and the…
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Algorithms 101: How to implement a queue by using two stacks
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用栈实现队列 In this problem, we are required to implement a queue using two stacks. The queue should support all four standard operations: push, pop, peek, and empty. 在这个问题中，我们需要使用两个栈来实现一个队列。该队列应支持所有四种标准操作：push、pop、peek 和 empty。 Approach The key idea to implement a queue using two stacks is to use one stack (stack1) to handle incoming…
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Algorithms 101: Queue Implementation Using Linked List and Array
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队列的链表实现和数组实现 Queue Implementation Using Linked List and Array 1. 使用链表实现队列 1. Queue Implementation Using Linked List A queue can be implemented using a linked list where each node represents an element in the queue. The head of the linked list represents the front of the queue, and the tail represents…
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Algorithms 101: What is a Queue
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什么是队列？ A queue is a linear data structure that follows the First-In-First-Out (FIFO) principle. This means that the first element added to the queue will be the first one to be removed. Queues are widely used in scenarios where tasks need to be processed in the order they arrive, such…