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[POJ 3264]Balanced Lineup(ST算法求RMQ)
Description For 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 game of Ultimate Frisbee with some of the cows. ...
分类:其他好文   时间:2014-08-25 23:01:45    阅读次数:508
CF-85D-Sum of Medians(线段树)
In one well-known algorithm of finding the k-th order statistics we should divide all elements into groups of five consecutive elements and find the median of each five. A median is called the middl...
分类:其他好文   时间:2014-08-25 22:50:55    阅读次数:297
Permutation Sequence
The set [1,2,3,…,n] contains a total of n! unique permutations.By listing and labeling all of the permutations in order,We get the following sequence ...
分类:其他好文   时间:2014-08-25 22:49:25    阅读次数:274
针对MySQL提高百万条数据的查询速度优化
针对MySQL提高百万条数据的查询速度优化1.对查询进行优化,应尽量避免全表扫描,首先应考虑在 where 及 order by 涉及的列上建立索引。 2.应尽量避免在 where 子句中对字段进行 null 值判断,否则将导致引擎放弃使用索引而进行全表扫描,如: select id from t....
分类:数据库   时间:2014-08-25 18:37:04    阅读次数:239
sql字符处理
--Description: 字符处理 --使用: 放到查询分析器里执行就可以了 --示例: select * from dbo.splitstr('12 44 45 50 56 87',' ') order by F1 asc --ALTER function split...
分类:数据库   时间:2014-08-25 16:19:24    阅读次数:201
[BestCoder Round #6] hdu 4981 Goffi and Median (水题)
Goffi and Median Problem Description A median in a sequence with the length of n is an element which occupies position number ?n+12? after we sort the elements in the non-decreasing order ...
分类:其他好文   时间:2014-08-25 11:55:34    阅读次数:159
Clustered Index
Clustered Index: Clustered index defines the way in which data is ordered physically on the disk. And there can only be one way in which you can order...
分类:其他好文   时间:2014-08-24 20:46:13    阅读次数:270
Sort Colors
Given an array with n objects colored red, white or blue, sort them so that objects of the same color are adjacent, with the colors in the order red, ...
分类:其他好文   时间:2014-08-24 11:32:02    阅读次数:164
算法之 有序链表和平衡二叉树
题目描述: Given a singly linked list where elements are sorted in ascending order, convert it to a height balanced BST. 给定一个有序的链表,要求构建一颗平衡二叉查找树。 解析:二叉查找树的中序遍历的结构就是一颗二叉查找树,要使得最终的二叉查找树的结构尽可能的平衡,也就是说只需要...
分类:其他好文   时间:2014-08-23 23:02:31    阅读次数:389
【Leet Code】Add Two Numbers
Add Two Numbers  Total Accepted: 20255 Total Submissions: 88115My Submissions You are given two linked lists representing two non-negative numbers. The digits are stored in reverse order a...
分类:其他好文   时间:2014-08-23 21:40:01    阅读次数:200
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