x:int)->None:## Push x onto stackself.l1.append(x)## The right of the list = the top of the stack = the back of the queuedefpop(self)->int:## pop 抽取## Removes the top element and returnifself.l1:whilelen(self.l1)>1:self.l2.append(...
You may assume that all operations are valid (for example, no pop or top operations will be called on an empty stack). 要求使用双队列实现一个栈的所有的功能,是一个很经典的问题,需要记住学习。 建议和这道题leetcode 232. Implement Queue using Stacks 双栈实现队列 一起学习。 1)取栈顶元素: ...
分析: 用两个queues,第二个queue永远为空,它只用于临时保存数字而已。 1classMyStack {2//Push element x onto stack.3LinkedList<Integer> q1 =newLinkedList<Integer>();4LinkedList<Integer> q2 =newLinkedList<Integer>();56publicvoidpush(intx) {7q1.offer(x);8}910//Removes the element on top of...
225. Implement Stack using Queues 开始写了两个queue的,实在太丑了,不好意思贴上了,改成了一个queue 1classMyStack {2Queue<Integer> queue =newLinkedList<Integer>();34//Push element x onto stack.5publicvoidpush(intx) {6queue.add(x);7}89//Removes the element on top of the stack.10publicv...
LeetCode 225 Implement Stack using Queues 用队列实现栈,1、两个队列实现,始终保持一个队列为空即可2、一个队列实现栈
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 empty. ...
225. Implement Stack using Queues(Stack-Easy) 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 empty....
Create a second stack, using the constructor that accepts an// IEnumerable(Of T).Stack<string> stack3 =newStack<string>(array2); Console.WriteLine("\nContents of the second copy, with duplicates and nulls:");foreach(stringnumberinstack3 ) { Console.WriteLine(number); } Console.WriteLine(...
Create a second stack, using the constructor that accepts an// IEnumerable(Of T).Stack<string> stack3 =newStack<string>(array2); Console.WriteLine("\nContents of the second copy, with duplicates and nulls:");foreach(stringnumberinstack3 ) { Console.WriteLine(number); } Console.WriteLine(...
string[] array2 = new string[numbers.Count * 2]; numbers.CopyTo(array2, numbers.Count); // Create a second stack, using the constructor that accepts an // IEnumerable(Of T). Stack<string> stack3 = new Stack<string>(array2); Console.WriteLine("\nContents of the second copy, with du...