Given a stringsconsists of upper/lower-case alphabets and empty space characters' ', return the length of last word in the string.If the last word doe...
分类:
其他好文 时间:
2014-07-19 22:36:30
阅读次数:
149
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 n...
分类:
其他好文 时间:
2014-07-19 22:34:50
阅读次数:
196
??
Description
Problem H: Partitioning by Palindromes
We say a sequence of characters is a palindrome if it is the same written forwards and backwards. For example, 'racecar' is a palindrome,...
分类:
其他好文 时间:
2014-07-18 15:13:10
阅读次数:
266
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", ...
分类:
其他好文 时间:
2014-07-18 11:19:56
阅读次数:
210
Avalidprovisioningprofileforthisexecutablewasnotfound导入证书,真机运行报错原因:provisioningprofile所对应的证书里面所包含的设备中,缺少了你自己这台设备的UDID,你需要把自己的UDID发送给提供provisioning文件的那个人,让他给你加上,然后再重新提供一个provisioningp..
分类:
其他好文 时间:
2014-07-17 20:23:09
阅读次数:
203
上一篇说到了,对于OS X 10.10 DP2,使用它内置的createinstallmedia命令生成的USB安装盘,安装后会把目标分区转化为Core Storage;另外,该命令的不完善的地方是,有的时候会说"xxx is not a valid volume mount point."而无法继续。所以,这个小脚本就派上了用场:...
分类:
其他好文 时间:
2014-07-17 16:39:39
阅读次数:
326
Given a string containing just the characters '(', ')', '{', '}', '[' and ']',
determine if the input string is valid.
The brackets must close in the correct order, "()" and "()[]{}" are
all va...
分类:
其他好文 时间:
2014-07-17 10:18:17
阅读次数:
181
在一个route中,通过在大括号中放一个占位符来定义( { and } )。当解析URL的时候,符号"/"和"."被作为一个定义符来解析,而定义符之间的值则匹配到占位符中。route定义中不在大括号中的信息则作为常量值。
下面是一些示例URL:
Valid route definitions
Examples of matching URL...
分类:
Web程序 时间:
2014-07-17 10:13:41
阅读次数:
477
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...
分类:
其他好文 时间:
2014-07-17 00:52:21
阅读次数:
376
Given a string s consists of upper/lower-case alphabets and empty space characters ' ', return the length of last word in the string.If the last word ...
分类:
其他好文 时间:
2014-07-16 14:23:00
阅读次数:
278