publicclassMyStack{ Queue<Integer> q;publicMyStack(){// int size():获取队列长度;//boolean add(E)/boolean offer(E):添加元素到队尾;//E remove()/E poll():获取队首元素并从队列中删除;//E element()/E peek():获取队首元素但并不从队列中删除。q
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. Notes: You must use only standard operations of a queu...
queue_1 = queue_2; queue_2 = queue_temp;returnlast_ele; }/** Get the top element. */publicinttop(){if(empty()){thrownewRuntimeException("MyStack空了!"); }returntop; }/** Returns whether the stack is empty. */publicbooleanempty(){returnqueue_1.isEmpty() && queue_2.isEmpty()...
Implement a last-in-first-out (LIFO) stack using only two queues. The implemented stack should support all the functions of a normal stack (push,top,pop, andempty). Implement theMyStackclass: void push(int x)Pushes element x to the top of the stack. int pop()Removes the element on t...
/** Push element x onto stack. */ public void push(int x) { if(queue1.isEmpty()){ queue2.offer(x); }else{ queue1.offer(x); } } /** Removes the element on top of the stack and returns that element. */ public int pop() { ...
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.
();}/** Returns whether the stack is empty. */publicbooleanempty(){returnqueue.isEmpty();}}/*** Your MyStack object will be instantiated and called as such:* MyStack obj = new MyStack();* obj.push(x);* int param_2 = obj.pop();* int param_3 = obj.top();* boolean param...
In this tutorial, we’re going to implement a stack data structure using two queues. 2. Stack and Queue Basics Before proceeding to the algorithm, let’s first take a glance at these two data structures. 2.1. Stack In a stack, we add elements in LIFO (Last In, First Out) order.This...
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. ...
简介: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() – Re Implement the following operations of a stack using queues. ...