"40. Implement Queue by Two Stacks" / "225. Implement Stack using Queues" 本题难度: Medium/Easy Topic: Data Structure stack/queue Desc
二、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. Notes:...
packageleetcodetypeMyStackstruct{enque[]intdeque[]int}/** Initialize your data structure here. */funcConstructor225()MyStack{returnMyStack{[]int{},[]int{}}}/** Push element x onto stack. */func(this*MyStack)Push(xint){this.enque=append(this.enque,x)}/** Removes the element on top...
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. ...
https://leetcode.com/problems/implement-queue-using-stacks/ 参考http://bookshadow.com/weblog/2015/07/07/leetcode-implement-queue-using-stacks/ 使用double stacks method or one stack method popjust remove the current element. peekreturn s the current element ...
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 : https://leetcode.com/problems/implement-queue-using-stacks/ ...
如果stack 2 为空,则把 stack 1的元素全部移动到 stack 2,并返回栈顶元素 pop() 类似于peek,但是在返回的时候是移除操作并返回该元素。 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...
0024-Swap-Nodes-in-Pairs 0025-Reverse-Nodes-in-k-Group 0026-Remove-Duplicates-from-Sorted-Array 0027-Remove-Element 0028-Implement-strStr/cpp-0028 CMakeLists.txt main.cpp main2.cpp main3.cpp main4.cpp main5.cpp main6.cpp main7.cpp 0033-Search-in-Rotated-Sorted-A...
You may assume that all operations are valid (for example, no pop or peek operations will be called on an empty queue). 这道题让我们用栈来实现队列,之前我们做过一道相反的题目Implement Stack using Queues 用队列来实现栈,是用队列来实现栈。这道题颠倒了个顺序,起始并没有太大的区别,栈和队列的...
232. 用栈实现队列 - 请你仅使用两个栈实现先入先出队列。队列应当支持一般队列支持的所有操作(push、pop、peek、empty): 实现 MyQueue 类: * void push(int x) 将元素 x 推到队列的末尾 * int pop() 从队列的开头移除并返回元素 * int peek() 返回队列开头的元素