225. 用队列实现栈 Implement Stack using Queues难度:Easy | 简单相关知识点:栈、设计题目链接:https://leetcode-cn.com/problems/implement-stack-using-queues/官方题解:https://leetcode-cn.com/problems/implement-stack-using-queues/solu
}/** Removes the element on top of the stack and returns that element. */publicintpop(){if(q1.size() ==0) {thrownewNoSuchElementException("[ERROR] The stack is empty!"); }while(q1.size() >1) { top = q1.remove(); q2.add(top); }intres=q1.remove(); Queue<Integer> temp = ...
* Initialize your data structure here. */function__construct(){$this->q1 = [];$this->q2 = []; }/** * Push element x onto stack. *@paramInteger $x *@returnNULL */functionpush($x){$this->q1[] =$x; }/** * Removes the element on top of the stack and returns that element....
3 解法1:两个 lists 列表实现 ## LeetCode 232classMyQueue:def__init__(self):self.l1=[]## queue1 = l1self.l2=[]## queue2 = l2defpush(self,x:int)->None:## Push x onto stackself.l1.append(x)## The right of the list = the top of the stack = the back of the queuedefpop...
Implement the following operations of a stack using queues. push(x) -- Push element x onto stack. pop() -- Removes the element on top of the stack. top() -- Get the top element. empty() -- Return whether the stack is empty. ...
225. Implement Stack using Queues # 题目 # Implement the following operations of a stack using queues. push(x) – Push element x onto stack. pop() – Removes the element on top of the stack. top() – Get the top element. empty() – Return whether the
仅使用两个队列(queue)实现一个后进先出(last-in-frist-out)(LIFO)的栈(stack)。你实现的栈需要满足常规栈的操作。(push、top、pop、empty)。 implement the MyStack class: void push(int x)Pushes element x to the top of the stack. int pop()Removes the element on the top of the stack and re...
LeetCode 225 Implement Stack using Queues 用队列实现栈,1、两个队列实现,始终保持一个队列为空即可2、一个队列实现栈
MyStack stack=newMyStack();stack.push(1);stack.push(2);stack.top();// 返回 2stack.pop();// 返回 2stack.empty();// 返回 false 注意: 你只能使用队列的基本操作-- 也就是push to back,peek/popfromfront,size, 和isempty这些操作是合法的。
Implement the following operations of a stack using queues. push(x) – Push element x onto stack. pop() – Removes the element on top of the stack. top() – Get the top element. empty() – Return whether the stack is empty.