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)...
LeetCode 232. Implement Queue using Stacks LeetCode 232. Implement Queue using Stacks (用栈实现队列) 题目 链接 https://leetcode-cn.com/problems/implement-queue-using-stacks/ 问题描述 请你仅使用两个栈实现先入先出队列。队列应当支持一般队列支持的所有操作(push、pop、peek、empty): 实现MyQueue 类:...
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. empty() — Return whether the queue is empty. Java Solution classMyQueue{Stack<Integer>te...
*/publicclassMyStack{privateQueue<Integer> queue1;privateQueue<Integer> queue2;privateinttop;/** Initialize your data structure here. */publicMyStack(){ queue1 =newLinkedList<>(); queue2 =newLinkedList<>(); }/** Push element x onto stack. */publicvoidpush(intx){ top = x; queue1.of...
Depending on your language, stack may not be supported natively. You may simulate a stack by using a list or deque (double-ended queue), as long as you use only standard operations of a stack. You may assume that all operations are valid (for example, no pop or peek operations will be...
""" if not self.outStack: while self.inStack: self.outStack.append(self.inStack.pop()) return self.outStack[-1] def empty(self): """ :rtype: bool """ return True if (len(self.inStack)+len(self.outStack))==0 else False...
Implement Queue using Stacks(用两个栈实现队列) 来源:https://leetcode.com/problems/implement-queue-using-stacks 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....
225. Implement 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. ...
leetcode 232. Implement Queue using Stacks classMyQueue {public:/** Initialize your data structure here.*/stack<int>r, b; MyQueue() { }/** Push element x to the back of queue.*/voidpush(intx) { r.push(x); }/** Removes the element from in front of queue and returns that ...
232. Implement Queue using Stacks 1classMyQueue2{3private:4stack<int>st;5public:6/** Initialize your data structure here.*/7MyQueue() {89}1011/** Push element x to the back of queue.*/12voidpush(intx)13{14stack<int>cur;15if(!st.empty())16while(!st.empty())17{18inti=st.top...