## LeetCode 232## Impletement Queue using StackclassMyQueue:def__init__(self):self.l1=[]## stack 1 = l1self.l2=[]## stack 2 = l2defpush(self,x:int)->None:## Push x onto queueself.l1.append(x)## The right of the list = the top of the stack = the back of the queuedef...
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:...
*/functionempty(){returnempty($this->stack1) ?true:false; } } 解法2:两个栈 使用两个栈,一个栈(stack1)仅负责入栈,一个栈(stack2)仅负责出栈。有新元素入队时,直接将元素压入 stack1 即可。但当出队时,需要判断 stack2 是否为空,如果为空,将 stack1 的元素依次出栈,压入 stack2 中,随后从 sta...
MyQueue object will be instantiated and called as such:* obj := Constructor();* obj.Push(x);* param_2 := obj.Pop();* param_3 := obj.Peek();* param_4 := obj.Empty();*/ 题目链接: Implement Queue using Stacks : https://leetcode.com/problems/implement-queue-using-stacks/ 用栈...
[LeetCode] 232. Implement Queue using Stacks 用栈模拟队列。同理参考影子题225题。 题干即是题意,用栈实现队列的几个函数,例子, Example: MyQueue queue = new MyQueue(); queue.push(1); queue.push(2); queue.peek(); // returns 1 queue.pop(); // returns 1...
今天介绍的是LeetCode算法题中Easy级别的第57题(顺位题号是232)。使用栈实现队列的以下操作。 push(x) - 将元素x推送到队列的后面。 pop() - 从队列前面删除元素。 peek() - 获取前面的元素。 empty() - 返回队列是否为空。 例如: MyQueue queue = new MyQueue(); ...
题目链接:https://leetcode.com/problems/implement-queue-using-stacks/题目: 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. ...
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...
shiftStack();if(!_old.empty())return_old.top();return0; }//Return whether the queue is empty.boolempty(void) {return_old.empty() &&_new.empty(); }private: stack<int>_old, _new; }; 用栈来实现队列[LeetCode] Implement Queue using Stacks,如需转载请自行联系原博主。
[]self.outstack = []def push(self, x):"""Push element x to the back of queue.:type x: int:rtype: void"""# 插入队列时,我们将值放入instack栈顶self.instack.append(x)def pop(self):"""Removes the element from in front of queue and returns that element.:rtype: int"""# 需要...