40. Implement Queue by Two Stacks/225. Implement Stack using Queues 本题难度: Medium/Easy Topic: Data Structure - stack/queue Description As the title described, you should only use two stacks to implement a queue's actions. The queue should support push(element), pop() and top() where ...
1classMyQueue {2public:3/** Initialize your data structure here.*/4MyQueue() {56}78/** Push element x to the back of queue.*/9voidpush(intx) {10stkPush.push(x);11}1213/** Removes the element from in front of queue and returns that element.*/14intpop() {15intval;16if(stkPo...
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. Example: MyQueue queue = new MyQueue(...
A classic interview question.This linkhas a nice explanation of the idea using two stacks and its amortized time complexity. I use the same idea in my code, which is as follows. 1classQueue {2public:3//Push element x to the back of queue.4voidpush(intx) {5stack1.push(x);6}78//...
Leetcode 232 Implement Queue using Stacks 和 231 Power of Two,1.232ImplementQueueusingStacks1.1问题描写叙述使用栈模拟实现队列。模拟实现例如以下操作:push(x).将元素x放入队尾。pop().移除队首元素。peek().获取队首元素。empty().推断队列是否为空。注意:仅仅能
Implement Queue using Stacks 解题报告:这个就是考虑Queue 和 Stack的输入输出数据结构的不同, 我看LeetCode上还有大神直接用peek peek就完事了的, 我这个就是比较笨的方法。 首先确定要有两个stack存数据, 我是设定一个stack 存有所有的数据, 基本上这个stack 就是个queue 。 再回来考虑queue和stack 的区别, ...
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, peek, pop, and empty). Implement the MyQueue class: void push(int x) Pushes element x to the back of the queue. ...
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,peek,pop, andempty). Implement theMyQueueclass: void push(int x)Pushes element x to the back of the queue. ...
我的LeetCode代码仓:https://github.com/617076674/LeetCode原题链接:https://leetcode-cn.com/problems/implement-queue-using-stacks/description/ 题目描述: 知识点:栈、队列 思路:双栈实现队列 push(x)和empty()的时间复杂度是O(1)。 pop()和peek()的 ...
LeetCode problem solving notes. 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, peek, pop, and empty).