AES五种加密模式(CBC、ECB、CTR、OCF、CFB)

                   分组密码有五种工作体制:1.电码本模式(Electronic 
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Technocup 2017 - Elimination Round 1 (Unofficially Open for Everyone, Rated for Div. 2) D

The organizers of a programming contest have decided to present t-shirts to participants. There are six different t-shirts sizes in this problem: 
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Technocup 2017 - Elimination Round 1 (Unofficially Open for Everyone, Rated for Div. 2) C

This is an interactive problem. You should use flush operation after each printed line. For example, in C++ you should usefflush(stdout), in
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Technocup 2017 - Elimination Round 1 (Unofficially Open for Everyone, Rated for Div. 2) B

Vasily exited from a store and now he wants to recheck the total price of all purchases in his bill. The bill is a string in which the names of the pu
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Technocup 2017 - Elimination Round 1 (Unofficially Open for Everyone, Rated for Div. 2) A

Vasily has a number a, which he wants to turn into a number b. For this purpose, he can do two types of operations:multiply the current numb
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iOS判断对象相等 重写isEqual、isEqualToClass、hash

相等的概念是探究哲学和数学的核心,并且对道德、公正和公共政策的问题有着深远的影响。从一个经验主义者的角度来看,两个物体不能依据一些观测标准中分辨出来,它们就是相等的。在人文方面,平等主义者认为相等意味着要保持每个人的社会、经济、政治和他们住地的司法系统都一致。对程序员来说,协调好逻辑和感官能力来理解
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OC学习篇之---类的初始化方法和点语法的使用

昨天介绍了OC中类的定义和使用:http://blog.csdn.net/jiangwei0910410003/article/details/41657603,今天我们来继续学习类的初始化方法和点语法的使用 一、首先来看一下类的初始化方法在Java中我们知道一个每个类都有构造方法,这里的
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sql-server-on-linux-how-i-think-they-did-it : Anthony Nocentino's Blog

http://www.sqlservercentral.com/blogs/anthony-nocentinos-blog/2016/11/21/sql-server-on-linux-how-i-think-they-did-it/ Anthony Nocentino is the fo
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TFDStoredProc执行sql server的部分存储过程报错,有的是好的。

TFDStoredProc执行sql server的部分存储过程报错,有的是好的。Invalid character value for cast specification 暂时无解。用fdquery执行存储过程exec pp,p1,p2是好的不报错。时间紧张先这样吧。 &nb
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理解OCI(Open Container Initiative)及docker的OCI实现(转)

OCI定义了容器运行时标准,runC是Docker按照开放容器格式标准(OCF, Open Container Format)制定的一种具体实现。runC是从Docker的libcontainer中迁移而来的,实现了容器启停、资源隔离等功能。Docker默认提供了docker-runc实现,事实上,
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