传送门 time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output ZS the Coder has recently found an interesting concept called the Birthday Paradox. It states that given a random set of \(23\) people,…

题目链接: E. ZS and The Birthday Paradox. time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output ZS the Coder has recently found an interesting concept called the Birthday Paradox. It states that giv…

DBE 连接SQL Server显然用ADO或DBEXPRESS更有优势,起码连接起来比较方便. BDE的话可以用如下方法:(以下以Delphi7为例,其它版本的DELPHI请自己摸索一下,不过基本相差不大) 1.启动Delphi,选择菜单项 Database->Explorer,在左侧Database列表里面右键,选择New,在弹出的驱动对话框里面选择MSSQL,确定,然后在左侧可以更改名字,如:TEST,然后在选中TEST在右侧选项里面添入ServerName(服务器名) UserName(…

F - 概率(经典问题) Time Limit:2000MS     Memory Limit:32768KB     64bit IO Format:%lld & %llu Submit Status Description Sometimes some mathematical results are hard to believe. One of the common problems is the birthday paradox. Suppose you are in a party…

ZS and The Birthday Paradox 题目链接:http://codeforces.com/contest/711/problem/E 数学题(Legendre's formula) 这题是以生日悖论(如果有23个或23个以上的人,那么至少有两个人的生日相同的概率要大于50%)为背景的数学题.公式本身不难推,主要是对大数的处理. 首先,我们需要找到分子和分母的公因数,这里用到了Legendre's formula(举个例子:10!的因数中质数3的个数为[10/3+10/(3^2…

According to Wikipedia, the well known barber paradox states like this: The barber is the "one who shaves all those, and those only, who do not shave themselves." The question is, does the barber shave himself? Actually, this paradox is directly…

ZS and The Birthday Paradox 感觉里面有好多技巧.. #include<bits/stdc++.h> #define LL long long #define fi first #define se second #define mk make_pair #define PLL pair<LL, LL> #define PLI pair<LL, int> #define PII pair<int, int> #define SZ(x…

E. ZS and The Birthday Paradox 题目连接: http://www.codeforces.com/contest/711/problem/E Description ZS the Coder has recently found an interesting concept called the Birthday Paradox. It states that given a random set of 23 people, there is around 50% c…

Paradox数据库是一个成名于15年前的数据库,那时候Borland公司还存在.最近客户提出需求,要在一套用了12年+的应用程序上作些功能更改.这套应用程序使用Delphi+Paradox数据库. Delphi和Paradox一样太古老,现在会这玩意的人应该不多了吧.想想一种语言太依赖一家公司,结果往往就是这样(真替C#担忧).最后客户同意使用C#开发一个外挂程序,但是数据库自然还是要用Paradox. 经过反复尝试,最终成就了下面的攻略. 环境:Win7 64 位 + VS2012 步骤一:…

点击打开链接 Sometimes some mathematical results are hard to believe. One of the common problems is the birthday paradox. Suppose you are in a party where there are 23 people including you. What is the probability that at least two people in the party have…