某次重启系统，使用sudo命令时突然出现问题，用户不在sudoers文件中，无法使用sudo权限。重启进入恢复模式，依然无法修改sudoers文件，可以设置root($suroot)密码，但是正常进入系统之后依然无效。(此时系统处于read-only模式)，因此需要进入读写模式设置：1.重启进入恢复模式..
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其他好文 时间：
2014-08-09 11:50:37
阅读次数：
269
Unique PathsA robot is located at the top-left corner of amxngrid (marked 'Start' in the diagram below).The robot can only move either down or right a...
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其他好文 时间：
2014-08-09 00:02:06
阅读次数：
201
Problem Description
bobo found an ancient string. The string contains only three charaters -- "(", ")" and "?".
bobo would like to replace each "?" with "(" or ")" so that the string is valid (d...
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其他好文 时间：
2014-08-08 18:15:06
阅读次数：
273
I find it easiest to understand move semantics with example code. Let's start with a very simple string class which only holds a pointer to a heap-all...
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其他好文 时间：
2014-08-08 15:39:06
阅读次数：
281
我的思路：循环遍历输入的单词，每次获取一组符合 fullJustify(vector &words, int L) { 2 // Note: The Solution object is instantiated only once. 3 vector res; 4 ...
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其他好文 时间：
2014-08-08 01:35:44
阅读次数：
239
Description
FJ's N (1 ≤ N ≤ 10,000) cows conveniently indexed 1..N are standing in a line. Each cow has a positive integer height (which is a bit of secret). You are told only the height H (1 ≤ H ≤...
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其他好文 时间：
2014-08-07 23:19:25
阅读次数：
346
Not only will you get the results within a few seconds, the websites of the company will have all the information you need to decide for yourself. The...
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其他好文 时间：
2014-08-07 12:36:49
阅读次数：
260
Spring-MVC中@ResponseBody返回Bean到前台接收这么一串代码，还套着HTML标签：The resource identified by this request is only capable of generating responses with characteristi...
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其他好文 时间：
2014-08-07 12:03:19
阅读次数：
191
Best Time to Buy and Sell StockSay you have an array for which theithelement is the price of a given stock on dayi.If you were only permitted to compl...
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其他好文 时间：
2014-08-07 00:20:37
阅读次数：
185
Problem Description
Given two matrices A and B of size n×n, find the product of them.
bobo hates big integers. So you are only asked to find the result modulo 3.
Input
The input con...
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其他好文 时间：
2014-08-06 14:58:51
阅读次数：
220
