Evaluate the value of an arithmetic expression in Reverse Polish Notation.
Valid operators are +, -, *, /.
Each operand may be an integer or another expression.
Some examples:
["2", "1",...
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编程语言 时间:
2014-10-13 20:33:47
阅读次数:
231
os7苹果公司加入了摄像头隐私设置选项:
在app中监测手机摄像头是否授权给APP:
#define PHOTOGRAPH_ACCREDIT if(VALID_VERSION(7.0)){ if(!([AVCaptureDevice authorizationStatusForMediaType:AVMediaTypeVideo] == AVAuthorizationStatusAuthorized)){ UIAlertView * alt...
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其他好文 时间:
2014-10-13 20:14:47
阅读次数:
177
Validate if a given string is numeric.Some examples:"0" => true" 0.1 " => true"abc" => false"1 a" => false"2e10" => trueNote: It is intended for the p...
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其他好文 时间:
2014-10-13 14:29:49
阅读次数:
216
Validate Binary Search Tree
Total Accepted: 23828 Total
Submissions: 91943My Submissions
Given a binary tree, determine if it is a valid binary search tree (BST).
Assume a BST is defined...
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其他好文 时间:
2014-10-12 17:40:38
阅读次数:
180
题目链接:http://poj.org/problem?id=1256思路: 该题为含有重复元素的全排列问题;由于题目中字符长度较小,采用暴力法解决。代码如下:#include #include using namespace std;const int MAX_N = 20;char P[MAX....
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其他好文 时间:
2014-10-12 02:56:48
阅读次数:
136
[leetcode]
Given a string containing just the characters '(' and ')', find the length of the longest valid (well-formed) parentheses substring....
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其他好文 时间:
2014-10-09 17:06:08
阅读次数:
187
之前因为重转系统,导致我的weblogic和myeclipse都要重装。重装之后,出现了问题,我是按照weblogic破解版的步骤来的,但还是报如下错误:
Unable to start WebLogic Server!
Error: license signature validation error.
Please make sure you have a valid license.b...
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系统相关 时间:
2014-10-09 16:05:28
阅读次数:
394
Given a string containing only digits, restore it by returning all possible valid IP address combinations.
For example:
Given "25525511135",
return ["255.255.11.135", "255.255.111.35"]. (Order ...
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其他好文 时间:
2014-10-08 10:45:25
阅读次数:
195
Given a binary tree, determine if it is a valid binary search tree (BST).
Assume a BST is defined as follows:
The left subtree of a node contains only nodes with keys less than the node's key.Th...
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其他好文 时间:
2014-10-06 19:32:50
阅读次数:
173
Given a stringsand a dictionary of wordsdict, add spaces insto construct a sentence where each word is a valid dictionary word.Return all such possibl...
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其他好文 时间:
2014-10-05 17:44:58
阅读次数:
201