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leetcode题目:Sum Root to Leaf Numbers和Longest Consecutive Sequence
题目一: Given a binary tree containing digits from 0-9 only, each root-to-leaf path could represent a number. An example is the root-to-leaf path 1->2->3 which represents the number 123. Fin...
分类:其他好文   时间:2014-05-26 04:06:41    阅读次数:248
关于MySQL主从复制中UUID的警告信息
日期: 2014年5月23日 博客: 铁锚 最近在查看MariaDB主从复制服务器 Master 的错误日志时看到很多条警告信息,都是提示 UUID()函数不安全,可能 Slave 产生的值和 Master不一致, 警告信息大致如下: 140522 15:11:10 [Warning] Unsafe statement written to the binary log using sta...
分类:数据库   时间:2014-05-24 21:54:38    阅读次数:600
LeetCode: Jump Game [054]
【题目】 Given an array of non-negative integers, you are initially positioned at the first index of the array. Each element in the array represents your maximum jump length at that position. Determine if you are able to reach the last index. For example:...
分类:其他好文   时间:2014-05-24 20:44:39    阅读次数:221
poj 3031 Big Christmas Tree(水spfa)
http://poj.org/problem?id=3013 题意: Because of a technical difficulty, price of an edge will be (sum of weights of all descendant nodes) × (unit price of the edge).这句话一直没看懂。后面还以为是最小生成树。 正确...
分类:其他好文   时间:2014-05-24 20:27:13    阅读次数:266
mysql基础操作、sql技巧和sql的常见优化
一、常见操作 1、复制表结构create table t2 like t1    复制表数据insert into t2 select * from t1 2、mysql索引    alter table用来创建普通索引、unique索引或primary key索引    alter table t add index index_name(column_list)    al...
分类:数据库   时间:2014-05-24 14:43:02    阅读次数:363
LeetCode: Merge Intervals [055]
【题目】 Given an array of non-negative integers, you are initially positioned at the first index of the array. Given a collection of intervals, merge all overlapping intervals. For example, Given [1,3],[2,6],[8,10],[15,18], return [1,6],[8,10],[15,18]. ...
分类:其他好文   时间:2014-05-24 14:18:27    阅读次数:193
good foreign technique websize
https://www.digitalocean.com/community/tagshttp://db-engines.com/en/http://www.tiobe.com/index.php/content/paperinfo/tpci/index.html
分类:Web程序   时间:2014-05-24 14:02:05    阅读次数:300
difference between InnoDB and MYISAM
look at http://www.xaprb.com/blog/2006/07/04/how-to-exploit-mysql-index-optimizations/prior to MySQL 5.5, MYISAM is default engine. InnoDB becomes def...
分类:数据库   时间:2014-05-24 12:58:04    阅读次数:322
MongoDB连接数与连接优化
默认每个连接数占用10M内存ulimit -a 查看stack sizeMongoDB服务器内存要满足 connection overhead + data size + index size即连接数开销+热点数据+索引连接数太多的问题:如果在日志中遇到类似如下的错误信息:"too many ope...
分类:数据库   时间:2014-05-24 11:18:25    阅读次数:378
50. 树的子结构[subtree structure in tree]
subtree structure in tree
分类:其他好文   时间:2014-05-24 09:23:20    阅读次数:283
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