1. linux下修改文件用户组
chgrp: change group的简写,修改文件所属的用户组。
linux下修改文件所有者
chown :change owner的简写, 修改文件的所有者。...
分类:
系统相关 时间:
2014-06-11 00:51:47
阅读次数:
336
1.首先使用RMAN做一次备份(必需有次备份)
rman target /
backup database;
or
backup database root;
backup pluggable database pdb;
2.在pdb中创建test用户并授权
sqlplus / as sysdba
alter session set container=pdb;
cr...
分类:
数据库 时间:
2014-06-11 00:37:06
阅读次数:
403
几个实例展示python中数据结构list的魅力!
list变量申明
the_count = [1, 2, 3, 4, 5]
fruits = ['apples', 'oranges', 'pears', 'apricots']
change = [1, 'pennies', 2, 'dimes', 3, 'quarters']
访问list元素
array= [1,2,5,3,6,8...
分类:
编程语言 时间:
2014-06-11 00:16:28
阅读次数:
285
对于这道题我只想说坑爹。绝对的坑爹。还有这样出题的。。。。。无耻的出题人Time
Limit:2000/1000 MS (Java/Others)Memory Limit:65536/32768 KB
(Java/Others)SubmitStatisticNext ProblemProblem D...
分类:
其他好文 时间:
2014-06-10 08:43:32
阅读次数:
197
You are climbing a stair case. It takesnsteps
to reach to the top.Each time you can either climb 1 or 2 steps. In how many
distinct ways can you climb...
分类:
其他好文 时间:
2014-06-10 08:41:34
阅读次数:
206
问题:
You are climbing a stair case. It takes n steps to reach to the top.
Each time you can either climb 1 or 2 steps. In how many distinct ways can you climb to the top?
分析:
该问题是符合斐波那契数列的,具体...
分类:
其他好文 时间:
2014-06-10 08:19:31
阅读次数:
194
A1 = ?
Time Limit: 5000/1000 MS (Java/Others) Memory Limit: 32768/32768 K (Java/Others)
Total Submission(s): 4682 Accepted Submission(s): 2990
Problem Description
有如下方程:Ai = (Ai-1 + Ai...
分类:
其他好文 时间:
2014-06-10 08:07:18
阅读次数:
145
题目
You are climbing a stair case. It takes n steps to reach to the top.
Each time you can either climb 1 or 2 steps. In how many distinct ways can you climb to the top?
方法
从后往前求解...
分类:
其他好文 时间:
2014-06-10 07:38:21
阅读次数:
171
MAX Average Problem
Time Limit: 2000/1000 MS (Java/Others) Memory Limit: 32768/32768 K (Java/Others)
Total Submission(s): 5825 Accepted Submission(s): 1446
Problem Description
Consid...
分类:
其他好文 时间:
2014-06-10 06:09:25
阅读次数:
293
Sort a linked list inO(nlogn) time using
constant space complexity.单向链表排序O(nlogn),Mergesort可以实现。 1 /** 2 * Definition for
singly-linked list. 3 * st.....
分类:
其他好文 时间:
2014-06-10 00:44:11
阅读次数:
329