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ICE CAVE(BFS搜索(模拟))
DescriptionYou play a computer game. Your character stands on some level of a multilevel ice cave. In order to move on forward, you need to descend on...
分类:其他好文   时间:2015-07-24 22:26:13    阅读次数:162
PHP生成唯一订单号
function build_order_no(){ return date('Ymd').substr(implode(NULL, array_map('ord', str_split(substr(uniqid(), 7, 13), 1))), 0, 8);}用uniqid获取一个基于当前...
分类:Web程序   时间:2015-07-24 20:39:48    阅读次数:181
关于Oracle的疑问
索引范围扫描(index range scan) select empno,ename from emp where empno > 1 order by empno 这种情况下不会使用索引范围扫描? 索引唯一扫描(index unique scan) 当数据类型不一致时,不会进行...
分类:数据库   时间:2015-07-24 20:27:07    阅读次数:170
mysql关于排序值的问题
select * from testsort order by sort desc ,status desc; sort字段为第一排序选择,status为第二排序选择
分类:数据库   时间:2015-07-24 15:54:46    阅读次数:135
AT91SAM9XEK ramdisk 启动笔记
1. 启动下面信息之后系统就挂掉了,没有继续输出信息Switching to clocksource tcb_clksrcNET: Registered protocol family 2IP route cache hash table entries: 1024 (order: 0, 4096 ...
分类:其他好文   时间:2015-07-24 15:38:24    阅读次数:153
mysql学习笔记——对数据记录查询操作的补充(单表内查询)
select ... from ... where ... group by ... having ... order by ... limit...; (顺序固定)1、select 指定所要检索的字段(列)select 后加distinct关键字,则可去除重复的记录,其中,重复的记录是指 所有字段...
分类:数据库   时间:2015-07-24 12:09:03    阅读次数:145
note
first_value(tafd.adv_nushi_ryaku_name) over(partition by tafd.adv_nushi_code order by substr(tafd.fee_mgmt_num, 2, 11) desc, substr(tafd.fee_mgmt_eda,...
分类:其他好文   时间:2015-07-24 10:36:31    阅读次数:92
Spiral Matrix
问题描述Given a matrix of m x n elements (m rows, n columns), return all elements of the matrix in spiral order. For example,Given the following matrix:[ ...
分类:其他好文   时间:2015-07-24 10:29:26    阅读次数:132
Remove Element
问题描述Given an array and a value, remove all instances of that value in place and return the new length.The order of elements can be changed. It doesn't...
分类:其他好文   时间:2015-07-24 09:16:36    阅读次数:117
poj 3264 线段树 求区间最大最小值
DescriptionFor the daily milking, Farmer John's N cows (1 ≤ N ≤ 50,000) always line up in the same order. One day Farmer John decides to organize a ga...
分类:其他好文   时间:2015-07-23 21:30:56    阅读次数:113
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