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Oracle分页语句
select * from (select A.*,rownum rd from (select * from [tablename] where [condition] order by [condition] ) A where rownum=[startpage*pagesize];1.sel...
分类:数据库   时间:2014-05-25 22:29:33    阅读次数:349
笔试算法题(37):二叉树的层序遍历 & 最长递增的数字串
出题:要求层序遍历二叉树,从上到下的层次,每一层访问顺序为从左到右,并将节点一次编号,输出如下;如果只要求打印指定的level的节点,应该如何实现。 a b c d e f g h i分析:原始的层序遍历类似于BFS,打印当前访问的节点curNode的序列号,并将其直接子节点放入队列queu...
分类:其他好文   时间:2014-05-25 22:22:45    阅读次数:321
UVA Tree Summing
题目如下:  Tree Summing  Background LISP was one of the earliest high-level programming languages and, withFORTRAN, is one of the oldest languages currently being used. Lists,wh...
分类:其他好文   时间:2014-05-25 21:39:51    阅读次数:276
LeetCode:Add Two Numbers
You are given two linked lists representing two non-negative numbers. The digits are   stored in  reverse order and each of their nodes contain a single digit. Add the two numbers   and return i...
分类:其他好文   时间:2014-05-25 21:36:52    阅读次数:268
增量备份,11g052题目解析
增量备份分为差异备份(differential incremental backup)和累积备份(cumulative incremental backup),这是两种执行增量备份操作的不同方法。80. You perform differential incremental level 1 bac...
分类:其他好文   时间:2014-05-25 20:03:24    阅读次数:301
Wargame narnia level 1 (中文攻略)
拿着我们的第0关得到的密码XXXX进入第1关ssh narnia1@narnia.labs.overthewire.orgcat narnia1.c#include int main(){ int (*ret)(); if(getenv("EGG")==NULL){ ...
分类:其他好文   时间:2014-05-25 18:54:06    阅读次数:575
何时产生临时表?
我们在执行某些SQL语句的时候有可能会生成临时表.我们应该尽量的去避免临时表.因为临时表会浪费内存和时间.那么什么情况下会产生临时表呢?这是来自MYSQL官方的说明If there is an ORDER BY clause and a different GROUP BY clause[官方说明]...
分类:其他好文   时间:2014-05-25 11:25:04    阅读次数:199
Geeks : Kruskal’s Minimum Spanning Tree Algorithm 最小生成树
寻找图中最小连通的路径,图如下: 算法步骤: 1. Sort all the edges in non-decreasing order of their weight. 2. Pick the smallest edge. Check if it forms a cycle with the spanning tree formed so far. If cycle is n...
分类:其他好文   时间:2014-05-25 07:35:59    阅读次数:301
LeetCode: Spiral Matrix II [058]
【题目】 Given an integer n, generate a square matrix filled with elements from 1 to n2 in spiral order. For example, Given n = 3, You should return the following matrix: [ [ 1, 2, 3 ], [ 8, 9, 4 ], [ 7, 6, 5 ] ] 【题意】 给定整数n, 将1,2,3...nxn个数按螺旋旋转的方式填入n...
分类:其他好文   时间:2014-05-25 07:08:17    阅读次数:235
LeetCode: Permutation Sequence [059]
【题目】 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 (ie, for n = 3): "123" "132" "213" "231" "312" "321" Given n and k, return the kth permutation ...
分类:其他好文   时间:2014-05-25 06:13:37    阅读次数:276
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