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 =newLinkedList<>(); }publicvoidpush(in...
class Stack { public: // Push element x onto stack. void push(int x) { if(q1.empty()&&q2.empty()) q1.push(x); else if(!q1.empty()) q1.push(x); else q2.push(x); } // Removes the element on top of the stack. void pop() { if(!q1.empty()) { while(q1.size()!=1...
我们可以边删除边添加。 classMyStack{Queue<Integer>queue;/** Initialize your data structure here. */publicMyStack(){queue=newLinkedList<>();}/** Push element x onto stack. */publicvoidpush(intx){queue.offer(x);}/** Removes the element on top of the stack and returns that element. *...
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. Example : MyStack stack=newMyStack();stack.push(1);stac...
225. Implement Stack using Queues class Stack { public: // Push element x onto stack. void push(int x) { Q.push(x); } // Removes the element on top of the stack. void pop() { int len = Q.size(); for (int i = 1; i < len; i++){...
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。
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. ...
leetcode225 implement stack using queues 题目要求 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....
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. ...
# 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 ...