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python & MySQLdb(two)
实现python封装# encoding=utf8import MySQLdb#定义类class MysqlHelper(): def __init__(self,host,port,db,user,passwd,charset='utf8'): self.host=host self.port=p... ...
分类:数据库   时间:2018-11-03 19:15:32    阅读次数:220
Prime Ring Problem HDU - 1016
A ring is compose of n circles as shown in diagram. Put natural number 1, 2, ..., n into each circle separately, and the sum of numbers in two adjacen ...
分类:其他好文   时间:2018-11-03 15:24:09    阅读次数:152
微服务架构下处理分布式事务,你必须知道的事儿
根据微服务架构的鼻祖 Martin Fowler 的忠告,微服务架构中应当尽量避免分布式事务。然而,在某些领域,分布式事务如同宿命中的对手无法避免。 在工程领域,分布式事务的讨论主要聚焦于强一致性和最终一致性的解决方案。 典型方案包括: 两阶段提交(2PC, Two-phase Commit)方案。 ...
分类:其他好文   时间:2018-11-03 14:09:51    阅读次数:151
29. Divide Two Integers
Given two integers dividend and divisor, divide two integers without using multiplication, division and mod operator. Return the quotient after dividi ...
分类:其他好文   时间:2018-11-03 14:08:15    阅读次数:188
How to Create Triggers in MySQL
https://www.sitepoint.com/how-to-create-mysql-triggers/ I created two tables: I created three triggers: first, I insert some records: second, I update ...
分类:数据库   时间:2018-11-03 12:40:47    阅读次数:178
【2016 ICPC亚洲区域赛北京站 E】What a Ridiculous Election(BFS预处理)
Description In country Light Tower, a presidential election is going on. There are two candidates, Mr. X1 and Mr. X2, and both of them are not like go ...
分类:其他好文   时间:2018-11-03 11:16:50    阅读次数:146
linux ccenteros 部署 redis
step one : yum install redis -- 安装redis数据库 step two:安装完成之后开启redis 服务 service redis start systemctl start redis.service --开启redis服务 ps -ef | grep redis ...
分类:系统相关   时间:2018-11-03 02:21:33    阅读次数:208
ccenteros 部署 redis
step one : yum install redis -- 安装redis数据库 step two:安装完成之后开启redis 服务 service redis start systemctl start redis.service --开启redis服务 ps -ef | grep redis ...
分类:其他好文   时间:2018-11-03 02:03:10    阅读次数:171
CF 1000G Two-Paths (树形DP)
题目大意:给你一棵树,点有点权$a_{i}$,边有边权$w_{e}$,定义一种路径称为$2-path$,每条边最多经过2次且该路径的权值为$\sum _{x} a_{x}\;-\;\sum_{e}w_{e}\cdot k_{e}$,$k_{e}$为边的经过次数,一共$Q$次询问,每次查询经过$x,y ...
分类:其他好文   时间:2018-11-03 00:04:00    阅读次数:171
1143 Lowest Common Ancestor
The lowest common ancestor (LCA) of two nodes U and V in a tree is the deepest node that has both U and V as descendants. A binary search tree (BST) i ...
分类:其他好文   时间:2018-11-02 23:39:33    阅读次数:180
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