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
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
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
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...
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其他好文 时间:
2014-05-25 20:03:24
阅读次数:
301
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
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
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...
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其他好文 时间:
2014-05-25 07:35:59
阅读次数:
301
【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...
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其他好文 时间:
2014-05-25 07:08:17
阅读次数:
235
【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 ...
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其他好文 时间:
2014-05-25 06:13:37
阅读次数:
276