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..
分类:
其他好文 时间:
2014-08-09 11:50:37
阅读次数:
269
Multiplication PuzzleTime Limit: 1000msMemory Limit: 65536KBThis problem will be judged onPKU. Original ID:165164-bit integer IO format:%lld Java clas...
分类:
其他好文 时间:
2014-08-09 11:24:57
阅读次数:
234
Moving TablesTime Limit: 2000msMemory Limit: 65536KBThis problem will be judged onZJU. Original ID:102964-bit integer IO format:%lld Java class name:M...
分类:
其他好文 时间:
2014-08-09 11:20:07
阅读次数:
341
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...
分类:
其他好文 时间:
2014-08-09 00:02:06
阅读次数:
201
Number BustersTime Limit: 1000msMemory Limit: 262144KBThis problem will be judged onCodeForces. Original ID:382B64-bit integer IO format:%I64d Java cl...
分类:
其他好文 时间:
2014-08-09 00:00:46
阅读次数:
406
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...
分类:
其他好文 时间:
2014-08-08 18:15:06
阅读次数:
273
Problem Description
Let A be an integral series {A1, A2, . . . , An}.
The zero-order series of A is A itself.
The first-order series of A is {B1, B2, . . . , Bn-1},where Bi = Ai+1 - Ai.
Th...
分类:
编程语言 时间:
2014-08-08 16:12:48
阅读次数:
200
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...
分类:
其他好文 时间:
2014-08-08 15:39:06
阅读次数:
281
Post OfficeTime Limit: 1000msMemory Limit: 10000KBThis problem will be judged onPKU. Original ID:116064-bit integer IO format:%lld Java class name:Mai...
分类:
其他好文 时间:
2014-08-08 01:46:07
阅读次数:
204
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 ...
分类:
其他好文 时间:
2014-08-08 01:35:44
阅读次数:
239