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【leetcode】Restore IP Addresses
Restore IP AddressesGiven a string containing only digits, restore it by returning all possible valid IP address combinations.For example:Given"255255...
分类:其他好文   时间:2015-01-03 11:49:35    阅读次数:178
Ubuntu 14.10 安装samba服务器
1.安装samba $sudo apt-get install samba 2.编辑配置表 $vi /etc/samba/smb.conf 在最后增加以下SECTION: [ home ] comment = workplace browseable = yes writeable = yes path = /home/ valid users = smb 3.创建sm...
分类:系统相关   时间:2015-01-02 22:29:15    阅读次数:238
[LeetCode]20 Valid Parentheses
https://oj.leetcode.com/problems/valid-parentheses/http://fisherlei.blogspot.com/2013/01/leetcode-valid-parentheses.htmlpublicclassSolution{ publicbooleanisValid(Strings) { if(s==null) returntrue; Stack<Character>stack=newStack<>(); for(charc:s..
分类:其他好文   时间:2015-01-02 16:12:14    阅读次数:99
【leetcode】Restore IP Addresses (middle)
Given a string containing only digits, restore it by returning all possible valid IP address combinations.For example:Given"25525511135",return["255.2...
分类:其他好文   时间:2015-01-02 13:24:09    阅读次数:185
[leetcode] Word Break2
题目:(DP, Backtracing)Given a stringsand a dictionary of wordsdict, add spaces insto construct a sentence where each word is a valid dictionary word.Ret...
分类:其他好文   时间:2015-01-02 06:23:46    阅读次数:122
LeetCode Longest Valid Parentheses
Given a string containing just the characters'('and')', find the length of the longest valid (well-formed) parentheses substring.For"(()", the longest...
分类:其他好文   时间:2015-01-01 21:10:28    阅读次数:149
Spring不能给sessionFactory注入值的问题,以及org.hibernate.HibernateException: createQuery is not valid without active transaction异常
在Struts2+Spring3+Hibernate4的框架下,本来想在DAO中通过setter注入,给sessionFactory赋值,但是却出现NullPointerException的异常。经过调试,发现sessionFactory的值为null。后来发现,原来在service层中,这个...
分类:编程语言   时间:2014-12-31 06:17:16    阅读次数:168
leetcode:String to Integer (atoi)
一、     题目 题目目的很明显,就是将一个字符串转换成整数,也就是平时经常用到的atoi. 二、     分析 题目其实不难,不过需要注意下面几点: 1、字符串前的空白 2. 字符串所表示数值的正负号 3. 结束条件,遇到非数字或者字符'\0'结束 4. 考虑溢出,与int值所能表示的最大(0x7fffffff)和最小值进行比较 5. 考虑异常输入情况下,用全局变量valid来...
分类:其他好文   时间:2014-12-31 01:08:33    阅读次数:148
Validate Binary Search Tree
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:2014-12-30 21:54:37    阅读次数:183
LeetCode: Valid Palindrome 解题报告
Valid PalindromeGiven a string, determine if it is a palindrome, considering only alphanumeric characters and ignoring cases.For example,"A man, a pla...
分类:其他好文   时间:2014-12-30 20:39:15    阅读次数:156
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