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查看MySQL的线程运行情况
使用管理员用户运行命令: mysql> show [full] processlist; # full是可选的,如果不加,默认只显示前100条结果。 可以靠这个结果来分析一些诸如用户连接状况之类的信息。譬如我当初用Navicat去连公司的远程数据库服务器,出现如下报错: Lost connectio ...
分类:数据库   时间:2017-12-13 23:28:22    阅读次数:129
POJ 3348 Cows | 凸包模板题
题目: 给几个点,用绳子圈出最大的面积养牛,输出最大面积/50 题解: Graham凸包算法的模板题 下面给出做法 1.选出x坐标最小(相同情况y最小)的点作为极点(显然他一定在凸包上) 2.其他点进行极角排序<极角指从坐标轴的某一方向逆时针旋转到向量的角度>, 极角一样按距离从近到远(可以用叉积实 ...
分类:其他好文   时间:2017-12-13 11:26:34    阅读次数:180
django ORM排序
I thought it would be an easy one, but found myself lost with 34 opened tabs on stackoverflow... The problem : keep it ordered Usually, obtaining a Qu ...
分类:编程语言   时间:2017-12-11 13:58:15    阅读次数:450
Mysql导入Sql文件时报Error Code: 2013 - Lost connection to MySQL server during query
MySql 有时我们导入sql文件,文件过大,导致Error Code: 2013 Lost connection to MySQL server during query这种错误 执行以下:  [sql] view plain copy print?SHOW GLOBAL&nb ...
分类:数据库   时间:2017-12-10 11:16:31    阅读次数:215
【工具】Sublime Text 自动保存功能
经常需要所以要频繁用到"ctrl+s"保存还是挺麻烦的,所以有的人需要用到失去焦点自动保存功能,这里简单记录下 1、点击"Preferences"里的设置-用户,有的版本是英文 2、ctrl+f找到“save_on_focus_lost”,把后面的"false"改成“true”就好 ...
分类:其他好文   时间:2017-12-07 14:52:49    阅读次数:183
洛谷——P2952 [USACO09OPEN]牛线Cow Line
P2952 [USACO09OPEN]牛线Cow Line 题目描述 Farmer John's N cows (conveniently numbered 1..N) are forming a line. The line begins with no cows and then, as tim ...
分类:其他好文   时间:2017-12-03 22:50:57    阅读次数:211
POJ - 3276 Face The Right Way
Farmer John has arranged his N (1 ≤ N ≤ 5,000) cows in a row and many of them are facing forward, like good cows. Some of them are facing backward, th ...
分类:其他好文   时间:2017-12-03 18:57:51    阅读次数:149
Round Numbers
Description The cows, as you know, have no fingers or thumbs and thus are unable to play Scissors, Paper, Stone' (also known as 'Rock, Paper, Scissors ...
分类:其他好文   时间:2017-11-28 13:30:17    阅读次数:192
luogu P3119 [USACO15JAN]草鉴定Grass Cownoisseur
题目描述 In an effort to better manage the grazing patterns of his cows, Farmer John has installed one-way cow paths all over his farm. The farm consists ...
分类:其他好文   时间:2017-11-26 15:52:32    阅读次数:172
P3119 [USACO15JAN]草鉴定Grass Cownoisseur
P3119 [USACO15JAN]草鉴定Grass Cownoisseur 题目描述 In an effort to better manage the grazing patterns of his cows, Farmer John has installed one-way cow path ...
分类:其他好文   时间:2017-11-26 11:14:57    阅读次数:163
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