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UVA-Matrix Chain Multiplication(栈)
Matrix Chain MultiplicationSuppose you have to evaluate an expression like A*B*C*D*E where A,B,C,D and E are matrices. Since matrix multiplication is ...
分类:其他好文   时间:2015-12-28 15:46:51    阅读次数:191
1068. Find More Coins (30)【背包】——PAT (Advanced Level) Practise
题目信息1068. Find More Coins (30)时间限制150 ms 内存限制65536 kB 代码长度限制16000 BEva loves to collect coins from all over the universe, including some other planets like Mars. One day she visited a universal shopp...
分类:其他好文   时间:2015-12-28 12:28:53    阅读次数:232
查看MySQL锁定情况
SHOW STATUS LIKE '%Table_locks%'Table_locks_immediate | 105 |Table_locks_waited | 3 |如果Table_locks_waited的值比较高,则说明存在着较严重的表级锁争用情况。这时,需要我们对应用做进一步的检查,来确....
分类:数据库   时间:2015-12-28 11:51:10    阅读次数:212
leetcode 6. ZigZag Conversion
The string "PAYPALISHIRING" is written in a zigzag pattern on a given number of rows like this: (you may want to display this pattern in a fixed font ...
分类:其他好文   时间:2015-12-28 10:31:01    阅读次数:117
MySQL max_allowed_packet设置及问题
mysql根据配置文件会限制server接受的数据包大小。有时候大的插入和更新会被max_allowed_packet 参数限制掉,导致失败。查看目前配置show VARIABLES like '%max_allowed_packet%';显示的结果为:+--------------------+-...
分类:数据库   时间:2015-12-28 10:13:58    阅读次数:164
Add Digits
Given a non-negative integernum, repeatedly add all its digits until the result has only one digit.For example:Givennum = 38, the process is like:3 + ...
分类:其他好文   时间:2015-12-26 22:11:57    阅读次数:145
Numpy的tile函数
1.函数的定义与说明tile函数是模板numpy.lib.shape_base中的函数。函数的形式是tile(A,reps)函数参数说明中提到A和reps都是array_like的,什么是array_like的parameter呢?在网上查了一下,始终搞不明白,便把熟悉的python数据类型都试了一...
分类:其他好文   时间:2015-12-26 22:10:37    阅读次数:264
Lucene.Net 站内搜索
Lucene.Net 站内搜索一 全文检索:like查询是全表扫描(为性能杀手)Lucene.Net搜索引擎,开源,而sql搜索引擎是收费的Lucene.Net只是一个全文检索开发包(只是帮我们存数据取数据,并没有界面,可以看作一个数据库,只能对文本信息进行检索)Lucene.Net原理:把文本切词...
分类:Web程序   时间:2015-12-26 19:33:40    阅读次数:319
centos安装wget 及配置(转)
yum -y install wget#yum install perlSearching for GCC...The path "" is not valid path to the gcc binary.Would you like to change it? [yes]如果出现这个就表明gcc...
分类:其他好文   时间:2015-12-26 18:28:10    阅读次数:13771
LeetCode 6 ZigZag Conversion(规律)
题目来源:https://leetcode.com/problems/zigzag-conversion/The string"PAYPALISHIRING"is written in a zigzag pattern on a given number of rows like this: (yo...
分类:其他好文   时间:2015-12-25 20:59:49    阅读次数:128
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