/*how to use two stacks to implement the queue: offer, poll, peek,size, isEmpty offer(3) offer(2) poll() offer(1) peek() offer(6) poll() poll() 3 2 2 1 in (3 2) (1 6) out (2) (3) 6 (1) stack1(in): is the only stack to store new elements when adding a new ...
5 Stack implementation using only one queue in C 4 Sorting a Stack in ascending order 9 Implementation of stack 3 Generic Stack (Array and Linked List) Implementation 8 Implement queue using two stacks 9 Concurrent FIFO in C++11 3 C++ Updated Stack Code 1 Concurrent Queue with...
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。 欢迎使用本博客的 Chrome 插件【Grandyang Blogs】～ 微信打赏 - 回复数字【0】随机推送一道题。 - 回复区间【1 - 1350】内任意数字推送对应的题目。
implement it by two stacks, do not use any other data structure and push, pop and top should be O(1) by AVERAGE. 1. 在push上做文章,每次push前,将stack1中的元素依次弹到stack2,element push到stack2后,再将stack2依次弹到stack1. 这样pop和top的操作就是O(1)。 但push的复杂度比较高 AI检测...
It is important to consider edge cases and potential pitfalls when implementing a queue using two stacks, and to ensure that the solution is robust and reliable in all scenarios. 此外,队列堆栈问题不仅是一个技术挑战,它还需要逻辑和算法思维来设计一个高效而优雅的解决方案。在使用两个栈实现队列时,...
http://www.lintcode.com/en/problem/implement-queue-by-two-stacks/ 【题目解析】 用两个Stack来实现一个Queue,可以考虑到push()时,几乎与Queue中的offer()一样,都是加在末尾,区别是当Stack pop()时,取出的是最近加入(newest)的元素,而Queue用poll()则是将最老(oldest)的元素取出。使用2个Stack,可以将...
class QueueTwoStacks(object): # Implement the enqueue and dequeue methods def enqueue(self, item): pass def dequeue(self): pass # Tests class Test(unittest.TestCase): def test_basic_queue_operations(self): queue = QueueTwoStacks() queue.enqueue(1) queue.enqueue(2) queue.enqueue(3) actual...
简介:A classic interview question. This link has a nice explanation of the idea using two stacks and its amortized time complexity. A classic interview question.This linkhas a nice explanation of the idea using two stacks and its amortized time complexity. ...
Have you ever had to make a queue out of two stacks or make a stack out of two queues on a whiteboard? You might remember that by creating a queue using two stacks you inherently are choosing to make enqueue or dequeue costly. You also might be more familiar with the simple linked lis...
using System; using System.Collections.Generic; class Example { public static void Main() { Queue<string> numbers = new Queue<string>(); numbers.Enqueue("one"); numbers.Enqueue("two"); numbers.Enqueue("three"); numbers.Enqueue("four"); numbers.Enqueue("five"); // A queue can be enum...