Farmer John has been informed of the location of a fugitive cow and wants to catch her immediately. He starts at a point N (0 ≤ N ≤ 100,000) on a number line and the cow is at a point K (0 ≤ K ≤ 100,000) on the same number line. Farmer John has two mod…
dkron (dkron 是一个定时任务执行系统,可以将所有的定时任务写成接口形式,用这个定时任务系统统一管理)定时任务所有的定时任务都不执行了,启动不了,查看日志报错: An operation on a socket could not be …
Timus 1037. Memory managementTimus 1037. Memory management 要求你实现一个内存管理器。 1037. Memory management Time Limit: 2.0 second Memory Limit: 16 MB Background Dont you know that at school pupils’ programming contest a new computer language has been d…
mcq 队列1) Which of the following points are valid with respect to conditional probability? Conditional Probability gives 100% accurate results.Conditional Probability can be applied to a single event.Conditional Probability has no effect or relevance or …
java 方法 示例ArrayDeque类offerLast()方法 (ArrayDeque Class offerLast() method) offerLast() Method is available in java.lang package. offerLast()方法在java.lang包中可用。 offerLast() Method is used to add the given element at the last of this deque. offerL…
题目
A Binary Search Tree (BST) is recursively defined as a binary tree which has the following properties:
The left subtree of a node contains only nodes with keys less than the node’s key. The right subtree of a node contains only nodes with keys grea…
1. 数制转换
【问题描述】
十进制数N和其他d进制数的转换是计算机实现计算的基本问题,其解决方法很多,其中一个简单算法基于下列原理:
N (N div d) * d (N mod d)
其中div是整除运算,mod是求余运算。
例如(2018&…
#include <iostream>
#include <vector> //使用邻接表
#include <queue> //拓扑排序使用队列
using namespace std;int n; //点的数量
int m; //边的数量
int inDegree[1001]; //保存入度数量
int outDegree[1001]; //保存出度数量
int c[105];
int u[105];s…
弗兰兹卡夫卡从是否正确出发,而不是从能否接受出发。Start with what is right rather than what is acceptable.1、背景假设你意气风发,要开发新一代的互联网应用,以期在互联网事业中一展宏图。借助云计算,很容易开发出如下原型系…
原文链接:https://www.ebpf.top/post/linux_process_mgr/本文是技术团队内部分享的版本,目的是通过进程管理及调度器历史对于 Linux 进程管理的演进过程起到一个总览的作用,完整的 PDF 可以在这里 下载。水平有限,本文内容仅供参考…
栈和队列严格意义上来说也属于线性表,因为它们也都用于存储逻辑关系为 “一对一” 的数据,其中栈为先进后出,队列为先进先出。其代码如下:
public class myStack{private int[]elements;public myStack(){elementsnew int[0];}pu…
java iteratorArrayDeque类降序Iterator()方法 (ArrayDeque Class descendingIterator() method) descendingIterator() Method is available in java.lang package. DescendingIterator()方法在java.lang包中可用。 descendingIterator() Method is used to return an iterato…
题目描述
继续思考"Populating Next Right Pointers in Each Node".这道题
给定一个二叉树 struct TreeLinkNode {↵ TreeLinkNode *left;↵ TreeLinkNode *right;↵ TreeLinkNode *next;↵ }
填充所有节点的next指针,指向它右兄弟节…
题目描述
用两个栈来实现一个队列,完成队列的Push和Pop操作。 队列中的元素为int类型。
import java.util.Stack;public class Solution {Stack<Integer> stack1 new Stack<Integer>();Stack<Integer> stack2 new Stack<Integer>();pub…
核心代码
public class Queue {//队列表头/表尾private Node first null;private Node lase null;public int getN() {return N;}//计数器private int N 0;//节点private class Node{Object obj;Node next;}//判断队列是否为空public Boolean isEmpty(){return first null…
回顾性队列研究One of our Scrum teams had been asking us for support: Could one of us ‘Agile coaches’ come and help the team? Perhaps by joining their Scrum events? I was unfamiliar with most of the team members, the team’s history, and their product. …
wait(long timeout)/notify()/notifyAll() 网上好多解释不是不全面就是有偏差,还是直接看官方解释
先来看一下源码:
public class Object {public final native void notify();public final native void notifyAll();public final native void wait(lo…
C —队列(queue)
今天我们来学习一下C中的队列(queue)。
特点
先进先出,后进后出。 什么意思呢? 队列只能出队最顶层,进队最底层。 比如: a(加入a) b a(加入b) c b a(加入c) c b(踢掉a) c(踢掉b) (踢掉c) 踢掉的顺序和加入的顺…
deque简介
deque 是一个双端列表, 如果要经常从两端操作数据, 选择deque 就比较好, 如果要实现随机访问,还是建议使用列表list. collections.deque官方说明文档
操作简介
append()
append(x) Add x to the right side of the deque.
import collections
mydequecollection…
题目: 丑数是一些因子只有2,3,5的数。数列1,2,3,4,5,6,8,9,10,12,15……写出了从小到大的前11个丑数,1属于丑数。现在请你编写程序,找出第1500个丑数是什么。
输出:The 1500’th ugly number is <…>.(<…>为你找到的…
题目: 用栈来模拟一个队列,要求实现队列的两个基本操作:入队、出队。 public class StackQueue {private Stack<Integer> stackA new Stack<>();private Stack<Integer> stackB new Stack<>();/*** 入队* param el…
本篇博客会讲解队列这种数据结构,并使用C语言实现。
概况
什么是队列呢?队列是一种先进先出的数据结构,即First In First Out,简称FIFO。队列有2端,分别是队头和队尾,规定只能在队尾插入数据(…
C类模板实现排序二叉树的相关功能函数(前序遍历,中序遍历,后序遍历(递归\非递归))
一.基本数据:
#include<iostream>
#include<stack>
#include<queue>
using std::cout;
using std::cin;
using s…
文章目录Number of Recent Calls 最近的请求次数Description思路Number of Recent Calls 最近的请求次数
Description
You have a RecentCounter class which counts the number of recent requests within a certain time frame.
每次调用ping方法会传入一个int tÿ…
文章目录Design Front Middle Back Queue 设计前中后队列Description思路Design Front Middle Back Queue 设计前中后队列
Description
Design a queue that supports push and pop operations in the front, middle, and back.
Pushing 6 into the middle of [1, 2, 3, 4, …
文章目录Design Circular Deque 设计循环双端队列Description思路:Design Circular Deque 设计循环双端队列
Description
MyCircularDeque circularDeque new MycircularDeque(3); // set the size to be 3
circularDeque.insertLast(1); // return true
circularDeque.in…
题目来源:PAT (Advanced Level) Practice
Shopping in Mars is quite a different experience. The Mars people pay by chained diamonds. Each diamond has a value (in Mars dollars M$). When making the payment, the chain can be cut at any position for o…
#include <iostream>
#include <cstdio>
#include <vector> //边的信息使用邻接表
#include <queue> //拓扑排序使用队列
using namespace std;int n; //点的数量
int m; //边的数量
int inDegree[100001]; //保存入度数量
int ans[100001]; //最终的答…
循环队列的顺序存储实现,包括入队,出队,清队,销毁队,遍历队列等
队列(queue)是一种先进先出(first in fist out,缩写为FIFO)的线性表,它只允许在…
bfs广度优先搜索算法1)广度优先搜索(BFS) (1) Breadth first search (BFS)) Breadth first search explores the space level by level only when there are no more states to be explored at a given level does the algorithm move on to the next level. 广度优先搜索仅当在…
2010 update: Lo, the Web Performance Advent Calendar hath moved 2010年更新: Lo, Web Performance Advent Calendar已移动 Dec 17 This post is part of the 2009 performance advent calendar experiment. Stay tuned for the articles to come. 12…
设已知有两个堆栈S1和S2,请用这两个堆栈模拟出一个队列Q。
所谓用堆栈模拟队列,实际上就是通过调用堆栈的下列操作函数:
int IsFull(Stack S):判断堆栈S是否已满,返回1或0; int IsEmpty (Stack S ):判断堆…
1,队列是一致先进先出结构(first in first out)FIFO 2,基于数据的方法实现队列,数组的具体类 package com.dream21th.algorithmicdatastructure.quene;/*** Auther: hp* Date: 2019/9/7 15:42* Description:*/
public …
原题链接
Alice likes snow a lot! Unfortunately, this year’s winter is already over, and she can’t expect to have any more of it. Bob has thus bought her a gift — a large snow maker. He plans to make some amount of snow every day. On day i he will make …
Java实现如下:
import java.util.*;
/**
public class TreeNode {int val 0;TreeNode left null;TreeNode right null;public TreeNode(int val) {this.val val;}
}
*/
public class Solution {public ArrayList<Integer> PrintFromTopToBottom(TreeNode…
1161. 最大层内元素和
dfs深搜,能比较方便的统计层数。
/*** Definition for a binary tree node.* public class TreeNode {* int val;* TreeNode left;* TreeNode right;* TreeNode(int x) { val x; }* }*/
class Solution {private int[] val…
#图的深度优先和广度优先遍历
def DFS(graph,s): #深度优先遍历,基于栈stack[] #建立栈stack.append(s) data[] #记录已经遍历过的点data.append(s)while stack:nstack.pop() # 取出栈中最后一个元素并删掉nodesgraph[n]for i in nodes[::-1]: #栈先进后出if i not in data:st…
第一步:计算线程,分界点可根据实际情况进行更改 //存放数据的队列Vector<List<NiaoJianDTO>> vector new Vector<>();//起一个线程池,防止A,B俩个线程同时读取到数据在不同线程里执行importData()方法private final Execu…
1. 前言在使用 Kubernetes 的过程中,我们看到过这样一个告警信息:[K8S] 告警主题: CPUThrottlingHigh告警级别: warning告警类型: CPUThrottlingHigh故障实例: 告警详情: 27% throttling of CPU in namespace kube-system for container kube-proxy in p…
消息队列与与生产者消费者模型
消息队列
package com.m.test;import java.util.LinkedList;/*** 消息队列** Author yzx*/
public class Queue<T> {private LinkedList<T> list new LinkedList<T>();private static final Integer MAX_SIZE 10;private I…
栈(Stack)
栈的概念
栈是一种特殊的线性表,只允许在固定的一端进行插入和删除操作,进行数据插入和删除的一端称为栈顶,另一端称为栈底。栈的数据遵循后进先出LIFO(Last In First Out)的原则。…
文章目录 一、题目二、题解 一、题目
933. Number of Recent Calls
You have a RecentCounter class which counts the number of recent requests within a certain time frame.
Implement the RecentCounter class:
RecentCounter() Initializes the counter with zero r…
2023每日刷题(二十六)
Leetcode—103.二叉树的锯齿形层序遍历 BFS实现代码
/*** Definition for a binary tree node.* struct TreeNode {* int val;* struct TreeNode *left;* struct TreeNode *right;* };*/
/*** Return an array of ar…
文章目录BlockingQueue阻塞队列关于无界队列和有界队列ArrayBlockingQueueLinkedBlockingQueuePriorityBlockingQueueDelayQueueSynchronousQueueTagBlockingQueue阻塞队列
A Queue that additionally supports operations that wait for the queue to become non-empty when …
stl:queue 源码In C STL, Queue is a type of container that follows FIFO (First-in-First-Out) elements arrangement i.e. the elements which insert first will be removed first. In queue, elements are inserted at one end known as "back" and are delete…
文章目录Kth Largest Element in an Array 数组中的第K个最大元素思路TagKth Largest Element in an Array 数组中的第K个最大元素
在未排序的数组中找到第 k 个最大的元素
输入: [3,2,1,5,6,4] 和 k 2
输出: 5思路
可以通过小顶堆, 并且将堆大小保持在k。此时堆…
[数据结构习题]队列——用栈实现队列 👉知识点导航💎:【数据结构】栈和队列
👉[王道数据结构]习题导航💎: p a g e 85.3 page85.3 page85.3 本节为栈和队列的综合练习题 题目描述: …
A - First Player
AC代码:
#include<iostream>
#include<algorithm>
#include<cstring>
using namespace std;
const int N110;
struct node{string name;int age;
}q[N];
int main()
{int n;cin>>n;for(int i1;i<n;i) cin>>q[i…
文章目录 5.2.1 二叉树二叉树性质引理5.1:二叉树中层数为i的结点至多有 2 i 2^i 2i个,其中 i ≥ 0 i \geq 0 i≥0。引理5.2:高度为k的二叉树中至多有 2 k 1 − 1 2^{k1}-1 2k1−1个结点,其中 k ≥ 0 k \geq 0 k≥0。引理5.3&…
关注了就能看到更多这么棒的文章哦~ Avoiding unintended connection failures with SO_REUSEPORT By Jonathan Corbet April 23, 2021 DeepL assisted translation https://lwn.net/Articles/853637/ 我们中的许多人都认为,我们自己运营的网络服务器都是…
学习死信队列,首先要理解死信产生的原因或条件: 消息被拒 ( basic.reject or basic.nack ) 并且没有重新入队 ( requeuefalse ); 消息在队列中过期,即当前消息在队列中的存活时间已经超过了预先设置的TTL ( Time To Live ) 时间&…
算法学习之栈与队列
一、栈 Stack
0x1 数组的子集
栈也是一种线性结构相比数组,栈对应的操作是数组的子集只能从一端添加元素,也只能从一端取出元素这一端称为栈顶栈是一种后进先出的数据结构 Last In First Out (LIFO)在计算机的世界里,栈…
队列是先进先出(FIFO, First In First Out)
队列是只允许在一端删除,在另一端插入的线性表
允许删除的一端叫做队头(front),允许插入的一端叫做队尾(rear)。
目录
队列抽象数据类型(模板)
队列实现
进队出队原则 循环队列&a…
文章目录Get Kth Magic Number 第k 个数思路Get Kth Magic Number 第k 个数
有些数的素因子只有 3,5,7,请设计一个算法找出第 k 个数。注意,不是必须有这些素因子,而是必须不包含其他的素因子。例如,前几个…
题目 One important factor to identify acute stroke (急性脑卒中) is the volume of the stroke core. Given the results of image analysis in which the core regions are identified in each MRI slice, your job is to calculate the volume of the stroke core. Input …
python 异步ioAsync IO is a concurrent programming design that has received dedicated support in Python, evolving rapidly from Python 3.4 through 3.7, and probably beyond. 异步IO是一种并发编程设计,已获得Python的专门支持,从Python 3.4到3…
题目来源:PAT (Advanced Level) Practice
Suppose a bank has N windows open for service. There is a yellow line in front of the windows which devides the waiting area into two parts. The rules for the customers to wait in line are:
The space insi…
//双向循环队列代码实现(C)
class MyCircularDeque {private:vector<int> arr;//head指向数组第一个数据,tail指向数组最后一个数据的下一个位置,count为数组元素个数int head,tail,count;
public:/** Initialize your data…
DLQ-死信队列(Dead Letter Queue)用来保存处理失败或者过期的消息。
出现以下情况时,消息会被redelivered A transacted session is used and rollback() is called(使用一个事务session,并且调用了rollback()方法).A transacted session is closed bef…
java 方法 示例ArrayDeque类peekLast()方法 (ArrayDeque Class peekLast() method) peekLast() Method is available in java.lang package. peekLast()方法在java.lang包中可用。 peekLast() Method is used to return the last element of the queue denoted by this deque b…
java 方法 示例ArrayDeque类pollLast()方法 (ArrayDeque Class pollLast() method) pollLast() Method is available in java.lang package. pollLast()方法在java.lang包中可用。 pollLast() Method is used to return the last element of the queue denoted by this deque b…
题目 Suppose that all the keys in a binary tree are distinct positive integers. Given the postorder and inorder traversal sequences, you are supposed to output the level order traversal sequence of the corresponding binary tree. Input Specification: Each i…
题目 Suppose a bank has N windows open for service. There is a yellow line in front of the windows which devides the waiting area into two parts. The rules for the customers to wait in line are: The space inside the yellow line in front of each window is e…
二叉树从左向右访问节点Problem statement: 问题陈述: Given a Binary Tree, Print the corner nodes at each level. The node at the leftmost and the node at the rightmost. 给定二叉树,在每个级别上打印角节点。 最左边的节点和最右边的节点。 E…
队列queue函数There is a function queue::empty() that can be used to check whether queue is empty or not – it returns 1 (true) if queue is empty else returns 0 (false). 有一个函数queue :: empty()可用于检查队列是否为空–如果队列为空,则返回1(真)&…
题目描述
宠物、狗和猫的类如下:
public class Pet { private String type;public Pet(String type) { this.type type; }public String getPetType() { return this.type; }
}
public class Dog extends Pet { public Dog() { super("dog"); }
}
public class…
c stl队列使用C provides the awesome feature of STL where we can use the basic ADTs without knowing the code behind the implementations. STL helps a lot to use ADTs efficiently without actually implementing them. This article provides basic knowledge to rep…
一、什么是数据结构
数据结构是指相互之间存在一种或多种特定关系的数据元素的集合。
二、队列原理
1.什么是队列?先入先出(FIFO—— First In First Out)数学模型
2.分类:普通队列、环形队列
3.用途?自动排号机.…
java offerArrayDeque类的offer()方法 (ArrayDeque Class offer() method) offer() Method is available in java.lang package. offer()方法在java.lang包中可用。 offer() Method is used to add the given element at the end of the deque. offer()方法用于在双端队列的末尾…
java的remove方法ArrayDeque类remove()方法 (ArrayDeque Class remove() method) Syntax: 句法: public boolean remove(Object obj);public T remove();remove() method is available in java.lang package. remove()方法在java.lang包中可用。 remove() method i…
给你一个二叉树,请你返回其按 层序遍历 得到的节点值。 (即逐层地,从左到右访问所有节点)。 /*** Definition for a binary tree node.* public class TreeNode {* int val;* TreeNode left;* TreeNode right;* T…
python
暴力法,遇到很大的输入数组时会超时。
class Solution:def maxSlidingWindow(self, nums: List[int], size: int):n len(nums)if size > n or size 0:return []res []left, right 0, size-1while right < n:res.append(max(nums[left:right1]))l…
994. 腐烂的橘子
洪泛法
class Solution {public int orangesRotting(int[][] grid) {int m grid.length;int n grid[0].length;int num 0; //新鲜橘子的个数Queue<Point> qu new LinkedList<>();for (int i 0; i < m; i) {for (int j 0; j < n; j) …
5347. 使网格图至少有一条有效路径的最小代价 BFS中每个点只入列一次,但有时,我们可能需要bfs中允许一个点入列多次才能解决问题,这种方法就是SPFA。 class Solution {public int minCost(int[][] grid) {int m grid.length, n grid[0].len…
译者序本文翻译自 Google 2017 的论文:Cardwell N, Cheng Y, Gunn CS, Yeganeh SH, Jacobson V.BBR: congestion-based congestion control[1]. Communications of the ACM. 2017 Jan 23;60(2):58-66.论文副标题:MeasuringBottleneckBandwidth andRound-…
异常为空栈异常:
public class EmptyStackException extends RuntimeException {public EmptyStackException(){}public EmptyStackException(String msg){super(msg);}}循环队列: class MyCircularQueue {public int[] elem;public int front;//队…
队列的核心为先进先出,即先入队的元素先出队,在之前手写的ArrayList中添加了删除方法实现了队列 /*** 在之前自定义的动态数组基础上完成队列,动态数组中要添加删除方法** author 大刘*/
public class Queue <E>{private ArraysList<…
【题目来源】https://www.luogu.com.cn/problem/P5661https://www.acwing.com/problem/content/1164/【题目描述】 著名旅游城市 B 市为了鼓励大家采用公共交通方式出行,推出了一种地铁换乘公交车的优惠方案: 1.在搭乘一次地铁后可以获得一张优惠票&…