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672. Bulb Switcher II
There is a room with n lights which are turned on initially and 4 buttons on the wall. After performing exactly m unknown operations towards buttons, ...
分类:其他好文   时间:2020-03-12 14:11:04    阅读次数:77
I/O系列 随机I/O 顺序I/O 转
出处: 理解I/O:随机和顺序 随机 I/O & 顺序 I/O 先看一篇译文介绍 随机I/O 顺序I/O Storage for DBAs: Ever been to one of those sushi restaurants where the food comes round in dishe ...
分类:其他好文   时间:2020-03-09 13:08:29    阅读次数:98
MySQL 内部锁
行级锁 对数据库的行记录进行加锁 优点: Fewer lock conflicts when different sessions access different rows. 当不同会话访问不同的行时会减少锁的冲突 Fewer changes for rollbacks. 在回滚的时候会减少修改量 ...
分类:数据库   时间:2020-03-07 22:33:16    阅读次数:116
Natas33 Writeup(Phar反序列化漏洞)
Natas33: 又是一个上传文件的页面,源码如下: // graz XeR, the first to solve it! thanks for the feedback! // ~morla class Executor{ private $filename=""; //三个私有参数 priva ...
分类:其他好文   时间:2020-03-07 00:15:02    阅读次数:112
三、代码折叠
[TOC] "原文地址" Folding in code 三、代码折叠 Folding in code is quite different in UDL 2.1. Instead of two keyword sets (open and close), now we have three key ...
分类:其他好文   时间:2020-03-02 20:32:16    阅读次数:70
Matlab画图所用到
画三维柱状图 datafilename = 'experiments_for_different_alpha_beta_J_results_c70.txt'; full_data = load(datafilename); J_plot = reshape(full_data(:,3),8,8); ...
分类:其他好文   时间:2020-03-02 10:39:10    阅读次数:71
Codeforces Round#622 Div2B Different Rules
题意: 尼古拉最近才开始从事竞争性节目,但已经有资格进入一个著名的奥运会决赛。将会有n个参与者,其中一个是尼古拉。像任何好的奥林匹克运动会一样,它由两轮组成。厌倦了传统规则,解决最多问题的参与者获胜,组织者想出了不同的规则。 假设在第一轮中,参与者A排在第x位,在第二轮中,参与者A排在第y位。那么参 ...
分类:其他好文   时间:2020-03-01 15:57:57    阅读次数:74
mindfulness
Search Inside Yourself Mindfulness Based Emotional Intelligence Module 101 Introduction To Emotional Intelligence Good morning everybody. Thank you al ...
分类:其他好文   时间:2020-02-26 01:38:30    阅读次数:61
[Javascript] Objects and Functions
What makes objects different is that we can create more of them. Every time we use the {} object literal, we create a brand new object value: let shre ...
分类:编程语言   时间:2020-02-25 19:49:14    阅读次数:82
LeetCode——012 Integer to Roman
Description Roman numerals are represented by seven different symbols: I, V, X, L, C, D and M. For example, two is written as II in Roman numeral, jus ...
分类:其他好文   时间:2020-02-20 09:28:12    阅读次数:79
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