* Push element x to the back of queue. *@paramInteger $x *@returnNULL */functionpush($x){while(!$this->empty()) {$this->stack2[] =array_pop($this->stack1); }$this->stack1[] =$x;while(!empty($this->stack2)) {$thi
/* * @lc app=leetcode id=232 lang=javascript * * [232] Implement Queue using Stacks *//** * Initialize your data structure here. */var MyQueue = function () { // tag: queue stack array this.stack = []; this.helperStack = [];};/** * Push element x to the back of q...
}/** Removes the element from in front of queue and returns that element. */publicintpop(){if(s1.isEmpty()) {thrownewIllegalArgumentException("[ERROR] The queue is empty!"); }returns1.pop(); }/** Get the front element. */publicintpeek(){if(s1.isEmpty()) {thrownewIllegalArgume...
【LeetCode题解】232_用栈实现队列(Implement-Queue-using-Stacks) 目录 描述 解法一:在一个栈中维持所有元素的出队顺序 思路 入队(push) 出队(pop) 查看队首(peek) 是否为空(empty) Java 实现 Python 实现 解法二:一个栈入,一个栈出 思路 入队(push) 出队(pop) 查看队首(peek) 是否为空(empty) ...
pushStack) - 1] } } } /** * Your MyQueue object will be instantiated and called as such: * obj := Constructor(); * obj.Push(x); * param_2 := obj.Pop(); * param_3 := obj.Peek(); * param_4 := obj.Empty(); */ 题目链接: Implement Queue using Stacks : leetcode.com...
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 Stack class MyQueue: def __init__(self): self.l1 = [] ## sta...
232. Implement Queue using Stacks # 题目 # 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() – Ret
题目 大意是使用queue队列(仅用标准操作)来实现stack的操作。 我的代码 主要思路:使用了双端队列,但默认屏蔽一些功能。使用了popleft() 和append()来实现。 优秀代码(使用类似rotate()方法)... 225. Implement Stack using Queues Implement the following operations of a stack using queues. push(x) -- Push...
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. ...
225. Implement Stack using Queues Solution Analysis: Take advantage of the characteristics of the js array, where the top of the stack is at the head of the array. Code: /** * Initialize your data structure here. */ var MyQueue = function() { this.queue = [] }; /** * Push elem...