peek:In computer science, peek is an operation on certain abstract data types, specifically sequential collections such as stacks and queues, which returns the value of thetop("front")of the collectionwithout removing the element from the collection. It thus returns the same value as operations s...
pop() -- 从队列首部移除元素。 peek() -- 返回队列首部的元素。 empty() -- 返回队列是否为空。 Implement the following operations of a queue using stacks. push(x) -- Push element x to the back of queue. pop() -- Removes the element from in front of queue. peek() -- Get the fron...
时间- 参考以上 空间O(n) - 用到两个stack JavaScript实现 1/**2* Initialize your data structure here.3*/4varMyQueue =function() {5this.first =[];6this.second =[];7};89/**10* Push element x to the back of queue.11* @param {number} x12* @return {void}13*/14MyQueue.prototype....
LeetCode232:Implement Queue using Stacks Implement the following operations of a queue using stacks. push(x) – Push element x to the back of queue. pop() – Removes the element from in front of queue. peek() – Get the front element. empty() – Return whether the queue is empty. No...
1 读题 LeetCode 232E 用栈实现队列 Implement Queue using Stacks 2 Python 解题 正如咱们前面那个问题,list 既可以实现栈,还能实现列表,所以咱这题的代码,和那个队列模拟栈的就很类似了。 ## LeetCode 232## Impletement Queue using StackclassMyQueue:def__init__(self):self.l1=[]## stack 1 = l1se...
简介:A classic interview question. This link has a nice explanation of the idea using two stacks and its amortized time complexity. A classic interview question.This linkhas a nice explanation of the idea using two stacks and its amortized time complexity. ...
leetcode - 232. Implement Queue using Stacks Problem: Implement the following operations of a queue using stacks. push(x) -- Push element x to the back of queue. pop() -- Removes the element from in front of queue. peek() -- Get the front elemen......
You may assume that all operations are valid (for example, no pop or top operations will be called on an empty stack). 题目大意 # 题目要求用队列实现一个栈的基本操作:push(x)、pop()、top()、empty()。 解题思路 # 按照题目要求实现即可。 代码# Go package leetcode type MyStack struct { ...
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leetcode - 232. Implement Queue using Stacks Problem: Implement the following operations of a queue using stacks. push(x) -- Push element x to the back of queue. pop() -- Removes the element from in front of queue. peek() -- Get the front elemen......