http://www.html5rocks.com/en/tutorials/speed/img-compression/ Types of compression algorithms There are generally two stages in an image compressor, a lossy phase, and lossless phase. Lossy compression algorithms will modify the source stream such th…

时间限制:10000ms 单点时限:1000ms 内存限制:256MB 描述 易信是由网易和电信联合开发的一款即时通讯软件.除了语音聊天,免费电话等新功能以外,传统的文字信息聊天功能也得以保留,因此每天都有大量的文字信息需要在服务器中存储,中转. 小Y是一名负责处理文字信息的易信工程师,每天他都要和字符串打交道.为了提高存储和传输效率,小Y在课余时间经常会去研究字符串的存储方法.通过内部使用的一种统一的加密算法,所有的文字信息首先都会被转化成只包含大写字母['A'...'Z']的字符串.为了压缩…

14.7 InnoDB Table Compression 14.7.1 Overview of Table Compression 14.7.2 Enabling Compression for a Table 14.7.3 Tuning Compression for InnoDB Tables 14.7.4 Monitoring Compression at Runtime 14.7.5 How Compression Works for InnoDB Tables 14.7.6 Comp…

传送门 time limit per test 4 seconds memory limit per test 256 megabytes input standard input output standard output Little Petya is now fond of data compression algorithms. He has already studied gz, bz, zip algorithms and many others. Inspired by the…

C. Table Compression Little Petya is now fond of data compression algorithms. He has already studied gz, bz, zip algorithms and many others. Inspired by the new knowledge, Petya is now developing the new compression algorithm which he wants to name d…

MongoDB3.0中的压缩选项 在MongoDB 3.0中,WiredTiger为集合提供三个压缩选项: 无压缩 Snappy(默认启用) – 很不错的压缩,有效利用资源 zlib(类似gzip) – 出色的压缩,但需要占用更多资源 有索引的两个压缩选项: 无压缩 前缀(默认启用) – 良好的压缩,资源的有效利用 请记住哪些适用于MongoDB的3.0所有压缩选项: 随机数据不能压缩 二进制数据不能压缩(它可能已经被压缩) 文本压缩效果特别好 对于文件中的字段名压缩效果特别好(尤其对短字段名来…

题目链接: http://codeforces.com/problemset/problem/650/C C. Table Compression time limit per test4 secondsmemory limit per test256 megabytes 问题描述 Little Petya is now fond of data compression algorithms. He has already studied gz, bz, zip algorithms and m…

C. Table Compression time limit per test4 seconds memory limit per test256 megabytes inputstandard input outputstandard output Little Petya is now fond of data compression algorithms. He has already studied gz, bz, zip algorithms and many others. Ins…

E. Table Compression 题目连接: http://www.codeforces.com/contest/651/problem/E Description Little Petya is now fond of data compression algorithms. He has already studied gz, bz, zip algorithms and many others. Inspired by the new knowledge, Petya is now…

题目链接: E. Table Compression time limit per test 4 seconds memory limit per test 256 megabytes input standard input output standard output Little Petya is now fond of data compression algorithms. He has already studied gz, bz, zip algorithms and many o…