"40. Implement Queue by Two Stacks" / "225. Implement Stack using Queues" 本题难度: Medium/Easy Topic: Data Structure stack/queue Desc
1classMyQueue {2public:3/** Initialize your data structure here.*/4MyQueue() {56}78/** Push element x to the back of queue.*/9voidpush(intx) {10stkPush.push(x);11}1213/** Removes the element from in front of queue and returns that element.*/14intpop() {15intval;16if(stkPo...
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. Example: MyQueue queue = new MyQueue(...
A classic interview question.This linkhas a nice explanation of the idea using two stacks and its amortized time complexity. I use the same idea in my code, which is as follows. 1classQueue {2public:3//Push element x to the back of queue.4voidpush(intx) {5stack1.push(x);6}78//...
Leetcode 232 Implement Queue using Stacks 和 231 Power of Two,1.232ImplementQueueusingStacks1.1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
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, and empty). Implement the MyQueue class: void push(int x) Pushes element x to the back of the queue. ...
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. ...
Follow-up: Can you implement the stack using only one queue? For questions of the same type, please refer to 232. Use stacks to implement queues Solution Analysis: Take advantage of the characteristics of the js array, where the top of the stack is at the end of the array. Code: /*...
package leetcode type MyQueue struct { Stack *[]int Queue *[]int } /** Initialize your data structure here. */ func Constructor232() MyQueue { tmp1, tmp2 := []int{}, []int{} return MyQueue{Stack: &tmp1, Queue: &tmp2} } /** Push element x to the back of queue. */ fu...
3.5 Implement a MyQueue class which implements a queue using two stacks.LeetCode上的原题,请参见我之前的博客Implement Queue using Stacks 用栈来实现队列。