232. 用栈实现队列 232. Implement Queue using Stacks 题目描述 使用栈实现队列的下列操作: push(x) -- 将一个元素放入队列的尾部. 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. 每日一算法2019/5/7Day 4LeetCode232. Implement Queue using Stacks 示例: MyQueue queue = new MyQueue(); que…

一.Implement Stack using Queues 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 em…

155. Min Stack class MinStack { public: /** initialize your data structure here. */ MinStack() { } void push(int x) { if(s1.empty() && s2.empty()){ s1.push(x); s2.push(x); } else{ if(x < s2.top()){ s1.push(x); s2.push(x); } else{ s1.push(x); s2…

1. 232 Implement Queue using Stacks 1.1 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:仅仅能使用栈的标准操作,push,pop,size和empty函数. 1.2 方法与思路 本题和用队列实现栈思路一样,设两个辅助栈stk1和stk2. push(x): 将x入栈stk1. pop(): 依次将stk1…

232 - 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 whe…

232. Implement Queue using Stacks Total Accepted: 27024 Total Submissions: 79793 Difficulty: Easy 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 o…

Implement Queue by Stacks 原题链接 : http://lintcode.com/zh-cn/problem/implement-queue-by-stacks/# 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 pop is…

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. Notes: You…

题目: 使用队列实现栈的下列操作: push(x) -- 元素 x 入栈 pop() -- 移除栈顶元素 top() -- 获取栈顶元素 empty() -- 返回栈是否为空 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 t…

题目: 使用栈实现队列的下列操作: push(x) -- 将一个元素放入队列的尾部. 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…