LeetCode 232. Implement Queue using Stacks (用栈实现队列) 题目 链接 https://leetcode-cn.com/problems/implement-queue-using-stacks/ 问题描述 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...
class MyQueue { Stack<Integer> stack; /** Initialize your data structure here. */ public MyQueue() { stack = new Stack<>(); } /** Push element x to the back of queue. */ public void push(int x) { stack.push(x); } /** Removes the element from in front of queue and retur...
232. Implement Queue using Stacks 仅供自己学习 思路: 这里只用两个栈来模拟队列,因为栈是先进后出,队列是先进先出,所以一个栈instack用来存进来的元素,另一个栈outstack存instack弹出的元素,且若instack要将元素加入进outstack中,只有当outstack空了才能重新加入新进instack得元素,否则顺序将错误。这样队列就能...
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 StackclassMyQueue:def__init__(self):self.l1=[]## stack 1 = l1se...
https://leetcode.com/problems/implement-queue-using-stacks/ Constaints 1 <= x <= 9 At most 100 calls will be made to push, pop, peek, and empty. All the calls to pop and peek are valid. 1. 2. 3. 4. Idea Use one stack for pushing element, the other stack for poping element...
Implement Queue using Stacks(用栈实现队列) 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....
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. ...
shiftStack();if(!_old.empty())return_old.top();return0; }//Return whether the queue is empty.boolempty(void) {return_old.empty() &&_new.empty(); }private: stack<int>_old, _new; }; 用栈来实现队列[LeetCode] Implement Queue using Stacks,如需转载请自行联系原博主。
This example implements stacks using arrays in C: #include<stdio.h>#include<stdlib.h>#defineSIZE4inttop=-1,inp_array[SIZE];voidpush();voidpop();voidshow();intmain(){intchoice;while(1){printf("\nPerform operations on the stack:");printf("\n1.Push the element\n2.Pop the element\n3...
The process of deletion in the queue is known as dequeue and the element will be deleted from the front end. How to implement the Stack using a Single Queue? The Stack can be easily implemented by making the insertion operation costly. For the push operation i.e. the insertion operation,...