题目链接: http://acm.hdu.edu.cn/showproblem.php?pid=5762 题目大意: 给n个点,坐标范围0~m(n,m<=105),求是否存在2个点对满足哈夫曼距离相等. 题目思路: [模拟] 乍一看n2绝对T了,但是细想之下发现,坐标范围只有105,那么哈夫曼距离最多就2x105种,所以当循环超出这个范围时肯定能找到解(抽屉原理). // //by coolxxx // #include<iostream> #include<algorithm&g…

Good Teacher Time Limit:1000MS     Memory Limit:0KB     64bit IO Format:%lld & %llu Submit Status Practice UVA 12662 I want to be a good teacher, so at least I need to remember all the student names. However, there aretoo many students, so I failed.…

Spring的依赖注入是指将对象的创建权交给Spring框架,将对象所依赖的属性注入进来的行为.在学习了dom4j后,其实也可以利用dom4j和反射做一个小Demo模拟Spring框架的这种功能.下面是具体的步骤: 第一步,编写配置文件.配置文件的书写,采用了和Spring的配置文件applicationContext.xml一样的书写规则: <?xml version="1.0" encoding="UTF-8"?> <!-- applicati…

ECMAScript6已经支持了class,但之前版本都不支持类,但是可以通过一些方法来模拟类. js中的类,既是重点,也是难点,很多时候都感觉模棱两可. 首先强调一下js中很重要的3个知识点:this.prototype.constructor. 下面我们来总结一下定义(模拟)类的几种方法: 1.工厂模式 ? 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 function createObject(name,age){   var obj = new Objec…

A. Vitya in the Countryside time limit per test 1 second memory limit per test 256 megabytes input standard input output standard output Every summer Vitya comes to visit his grandmother in the countryside. This summer, he got a huge wart. Every gran…

Candy Sharing Game Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 65536/32768 K (Java/Others) Problem Description A number of students sit in a circle facing their teacher in the center. Each student initially has an even number of pieces of…

C#7.2——编写安全高效的C#代码 2018-11-07 18:59 by 沉睡的木木夕, 123 阅读, 0 评论, 收藏, 编辑 原文地址:https://docs.microsoft.com/zh-cn/dotnet/csharp/write-safe-efficient-code?view=netcore-2.1值类型的优势能避免堆分配.而劣势就是往往伴随的数据的拷贝.这就导致了在大量的值类型数据很难的最大化优化这些算法操作(因为伴随着大量数据的拷贝).而在C#7.2 中就提供了一种机…

Too Simple Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 65536/65536 K (Java/Others)Total Submission(s): 1214    Accepted Submission(s): 406 Problem Description Rhason Cheung had a simple problem, and asked Teacher Mai for help. But Teacher…

# -*- coding:utf-8 -*- import time class Person(object): ''' 定义父类:人 属性:姓名,年龄 方法:走路(打印:姓名+“正在走路”) ''' def __init__(self, name, age): self.name = name self.age = age def walk(self): print self.name + "正在走路" class Teacher(Person): ''' 定义子类:老师 属性:上课…

A. Hongcow Learns the Cyclic Shift time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output Hongcow is learning to spell! One day, his teacher gives him a word that he needs to learn to spell. Bein…