1 读题 LeetCode 232E 用栈实现队列 Implement Queue using Stacks 2 Python 解题 正如咱们前面那个问题,list 既可以实现栈,还能实现列表,所以咱这题的代码,和那个队列模拟栈的就很类似了。 ## LeetCode 232## Impletement Queue using StackclassMyQueue:def__init__(self):self.l1=[]## stack 1 = l1se...
x:int)->None:## Push x onto stackself.l1.append(x)## The right of the list = the top of the stack = the back of the queuedefpop(self)->int:## pop 抽取## Removes the top element and returnifself.l1:whilelen(self.l1)>1:self.l2.append(...
Python queue is an important concept in the data structure. Queue in Python is nothing but data item containers. With the help of a queue in Python, we can control the flow of our tasks. Say, we are manipulating data that is collected from a website and then writing the manipulated data...
MyQueue myQueue = new MyQueue(); myQueue.push(1); // queue is: [1] myQueue.push(2); // queue is: [1, 2] (leftmost is front of the queue) myQueue.peek(); // return 1 myQueue.pop(); // return 1, queue is [2] myQueue.empty(); // return false 提示: 1 <= x <=...
class Queue(object): def __init__(self): """ initialize your data structure here. """ self.inStack=[] self.outStack=[] def push(self, x): """ :type x: int :rtype: nothing """ self.inStack.append(x) def pop(self): ...
Okay, if you’re threading, you can’t uselistfor a stack and you probably don’t want to usedequefor a stack, so howcanyou build a Python stack for a threaded program? The answer is in thequeuemodule,queue.LifoQueue. Remember how you learned that stacks operate on the Last-In/First...
Depending on your language, queue may not be supported natively. You may simulate a queue by using a list or deque (double-ended queue), as long as you use only standard operations of a queue. You may assume that all operations are valid (for example, no pop or top operations will be...
C program to implement queue using array (linear implementation of queue in C) Topological sort implementation using C++ program C++ program to find number of BSTs with N nodes (Catalan numbers) C++ program to check whether a given Binary Search Tree is balanced or not?
queue.peek();// 返回 1queue.pop();// 返回 1queue.empty();// 返回 false 说明: 你只能使用标准的栈操作 -- 也就是只有push to top,peek/pop from top,size, 和is empty操作是合法的。 你所使用的语言也许不支持栈。你可以使用 list 或者 deque(双端队列)来模拟一个栈,只要是标准的栈操作即可。
* The main queue using to store all the elements in the stack */privateQueue<Integer> q1;/** * The auxiliary queue using to implement `pop` operation */privateQueue<Integer> q2;/** * The top element in the stack */privateinttop;/** Initialize your data structure here. */publicMySta...