int pop()Removes the element on the top of the stack and returns it. int top()Returns the element on the top of the stack. boolean empty()Returnstrueif the stack is empty,falseotherwise. Notes: You must useonly
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 queue -- which means only push to back , ...
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 =newLinkedList<>(); }publicvoidpush(intx){ q.add(x);fo...
out (2) (3) 6 (1) stack1(in): is the only stack to store new elements when adding a new element into the queue stack2(out): is the only stack to pop old element out of the queue. when stack2 is empty, we move all data from stack1(in) to stack2(out) if any **/publicc...
// stackB.pop(); } } // Return whether the queue is empty. bool empty(void) { if(stackB.empty()&&stackA.empty()) return true; else return false; } stack<int> stackA; stack<int> stackB; }; 1. 2. 3. 4. 5. 6.
栈Stack:后进先出,last-in-first-out LIFO 队列Queue:先进先出,first-in-first-out FIFO 题目要求: 最多使用2个队列,来实现栈; 支持栈的方法: push(x), 把元素 x 推入栈; top/peek(), 返回栈顶元素; pop,移除栈顶元素; empty(),判断栈是否为空。
Depending on your language, the queue may not be supported natively. You may simulate a queue using a list or deque (double-ended queue) as long as you use only a queue's standard operations. class MyStack { private Queue<Integer> data;//输入队列 ...
* int param_2 = obj.pop(); * int param_3 = obj.top(); * boolean param_4 = obj.empty(); */ 方法2,两个queue, 并没有显著的差别 push时,若q1是empty, 则q1.add(a), 并且把q2中的元素全部poll()到q1中 publicclassMyStack{privateQueue<Integer>q1;privateQueue<Integer>q2;/** Initializ...
{// Remove the transfer request in order to make room in the// queue for more transfers. Transfers are not automatically// removed by the system.RemoveTransferRequest(transfer.RequestId);// In this example, the downloaded file is moved into the root// Isolated Storage directoryusing(...
{// Remove the transfer request in order to make room in the// queue for more transfers. Transfers are not automatically// removed by the system.RemoveTransferRequest(transfer.RequestId);// In this example, the downloaded file is moved into the root// Isolated Storage directoryusing(...