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POJ 3286 How many 0's?
题目链接题意 :写下m到n之间所有的数,会写多少个0。思路 :先算0到m的,再算0到n的,最后相减。网上有位大神是这么推的,看下面。。。。首先转化成求 [0, x] 中所有数中,含有的 0 的个数那么对于一个数 x,怎么求出从 0 到 x 中所有数含有 0 的个数的和呢?我们可以限制每一位是 0,然...
分类:其他好文   时间:2014-06-28 15:35:56    阅读次数:175
find中的 time 参数
find手册中对time的解释:以 atime 为例:-atime n File was last accessed n*24 hours ago. When find figures out how many 24-hours periods ago the file was last...
分类:其他好文   时间:2014-06-28 12:09:59    阅读次数:222
[LeetCode] Unique Binary Search Trees
Given n, how many structurally unique BST's (binary search trees) that store values 1...n?For example, Given n = 3, there are a total of 5 unique BST'...
分类:其他好文   时间:2014-06-28 11:57:50    阅读次数:232
[LeetCode OJ]-Climbing Stairs
You are climbing a stair case. It takesnsteps to reach to the top.Each time you can either climb 1 or 2 steps. In how many distinct ways can you climb...
分类:其他好文   时间:2014-06-24 10:22:48    阅读次数:214
[Hibernate] - many to one
Hibernate的多对一操作:例子参考引用:http://www.tutorialspoint.com/hibernate/hibernate_many_to_one_mapping.htmhibernate.cfg.xml com.mysql.jdbc.Dr...
分类:系统相关   时间:2014-06-23 08:39:33    阅读次数:570
如何在VirtualBox 虚拟机中挂载共享文件夹
简单的小技巧: 介绍如何在虚拟机VirtualBox 中打开共享文件夹(小技巧,高手勿入)。 To you, maybe too easy ,maybe not. Hope it will help you ....
分类:其他好文   时间:2014-06-22 22:14:41    阅读次数:221
UVa 10061 - How many zero's and how many digits ?
题目:给你一个数字n,一个数字b,问n!转化成b进制后的位数...
分类:其他好文   时间:2014-06-22 20:23:39    阅读次数:178
linux中ERROR: The partition with /var/lib/mysql is too full!解决办法
今天在ubuntu上遇见这个问题。应该是我的第一分区太小了。 解决办法: bey0nd@wzw:/var$ cd /var bey0nd@wzw:/var$ rm -rf log 我们删除日志文件 bey0nd@wzw:/var$ /etc/init.d/mysql start 在开启mysql就正常了...
分类:数据库   时间:2014-06-21 23:58:25    阅读次数:416
ORA-00913错误:PL/SQL: ORA-00913: too many values
ORA-00913错误 描述:PL/SQL: ORA-00913: too many values 目标:编写一个可以循环插入数据的脚本 操作过程: SQL> desc tcustmer Name               Null?    Type  ----------------- -------- -------------------------...
分类:数据库   时间:2014-06-21 21:40:02    阅读次数:326
Open vSwitch Advanced Features Tutorial
Open vSwitch Advanced Features Tutorial=======================================Many tutorials cover the basics of OpenFlow. This is not such atutorial....
分类:其他好文   时间:2014-06-21 16:00:06    阅读次数:271
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