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MySql的replace into 语句
MySQL REPLACE语句介绍 MySQL的REPLACE语句是一个MySQL扩展于SQL标准的语句。 官方定义:REPLACE works exactly like INSERT, except that if an old row in the table has the same valu ...
分类:数据库   时间:2018-07-24 17:42:32    阅读次数:182
CF 1003B Binary String Constructing 【构造/找规律/分类讨论】
``` You are given three integers a, b and x. Your task is to construct a binary string s of length n=a+b such that there are exactly a zeroes, exactly ...
分类:其他好文   时间:2018-07-22 00:10:00    阅读次数:235
What exactly can you do with Python? Here are Python’s 3 main applications._你能用Python做什么?下面是Python的3个主要应用程序。
原文链接 一、陈述 1,我到底能用Python做什么? 我观察注意到Python三个主要流行的应用: 网站开发; 数据科学——包括机器学习,数据分析和数据可视化; 做脚本语言。 二、网站开发 网站框架将帮助你创建基于Python的服务器端代码(后端代码),这些代码将在你的服务器上运行,与用户的设备和 ...
分类:移动开发   时间:2018-07-21 22:44:33    阅读次数:513
解决double的值相加的问题
针对double类型的计算的问题之一: 此结果是:2.2800000000000002 从上面两个的结果,显然与我们想要的结果有点不一样,如果是针对金融方面的话,那么一个小数点的问题就会影响很大,那么对于这样的问题,我们要如何的解决哪? 答:BigDecimal这个类。 那为啥上面使用了这个BigD ...
分类:其他好文   时间:2018-07-19 22:57:08    阅读次数:325
COCI 2003 LIFTOVI 电梯 SPFA
LIFTOVI Solitaire has N elevators. Each elevator are connecting exactly two floors and it does not stop on thefloors between that two floors. The spee ...
分类:其他好文   时间:2018-07-16 23:05:41    阅读次数:169
E - Cheap Kangaroo
Description There are N kangaroos going out to eat at an Indian restaurant. The ith kangaroo wants to eat exactly xi food. The kangaroos all want to o ...
分类:其他好文   时间:2018-07-16 11:14:30    阅读次数:141
usaco16 jan gold
T1:angry cows Bessie the cow has designed what she thinks will be the next big hit video game: "Angry Cows". The premise, which she believes is comple ...
分类:其他好文   时间:2018-07-10 23:38:17    阅读次数:222
Chocolate Bar
题目描述 There is a bar of chocolate with a height of H blocks and a width of W blocks. Snuke is dividing this bar into exactly three pieces. He can only ...
分类:其他好文   时间:2018-07-10 21:28:44    阅读次数:123
IOI 2000 Walls Floyd+枚举
Walls PROBLEM In a country, great walls have been built in such a way that every great wall connects exactly two towns. The great walls do not cross e ...
分类:其他好文   时间:2018-07-08 14:42:41    阅读次数:165
Gym - 100989G (二分法)
There are K hours left before Agent Mahone leaves Amman! Hammouri doesn't like how things are going in the mission and he doesn't want to fail again. ...
分类:其他好文   时间:2018-07-08 11:12:20    阅读次数:198
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