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LeetCode36:Valid Sudoku
Determine if a Sudoku is valid, according to: Sudoku Puzzles - The Rules. The Sudoku board could be partially filled, where empty cells are filled with the character '.'. A partially fille...
分类:其他好文   时间:2015-06-11 19:33:01    阅读次数:129
Leetcode[20]-Valid Parentheses
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 valid but "...
分类:其他好文   时间:2015-06-11 17:05:56    阅读次数:123
手机短信接收验证码的实现原理:
关于手机短信接收验证码的实现原理:思路:A:获得验证码:1.找到相关的表。2.用什么发送,post,get ,ajax,当然ajax首选3.post之前要js先判断是手机号码11位,并且全部都是数字,或者用正则也行。4.用ajax发送数据data,要对数据进行检验,过滤有效数据valid 5.ins...
分类:移动开发   时间:2015-06-11 16:36:48    阅读次数:226
Leetcode[20]-Valid Palindrome
Given a string, determine if it is a palindrome, considering only alphanumeric characters and ignoring cases.For example, "A man, a plan, a canal: Panama" is a palindrome. "race a car" is not a palindr...
分类:其他好文   时间:2015-06-11 14:38:52    阅读次数:117
leetcode - Valid Number
题目: Valid Number Validate if a given string is numeric. Some examples: "0" => true " 0.1 " => true "abc" => false "1 a" => false "2e10" => true class Solution { public: bool is...
分类:其他好文   时间:2015-06-10 12:22:09    阅读次数:113
[leetcode] Validate Binary Search Tree
Validate Binary Search TreeGiven a binary tree, determine if it is a valid binary search tree (BST).Assume a BST is defined as follows:The left subtre...
分类:其他好文   时间:2015-06-10 12:03:48    阅读次数:89
Valid Palindrome
基础但是要掌握 int a = 'A'这种写法,以及s.trim(); s = s.toUpperCase();public class Solution { public boolean isPalindrome(String s) { if(s==null ||...
分类:其他好文   时间:2015-06-10 11:56:06    阅读次数:101
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:2015-06-10 06:27:16    阅读次数:102
LightOJ1021---Painful Bases (状压dp)
As you know that sometimes base conversion is a painful task. But still there are interesting facts in bases.For convenience let’s assume that we are dealing with the bases from 2 to 16. The valid symb...
分类:其他好文   时间:2015-06-09 21:59:18    阅读次数:133
CENTOS7错误:Cannot find a valid baseurl for repo: base/7/x86_6
yum安装时报Cannotfindavalidbaseurlforrepo:base/7/x86_6.PING国内的外网时正常。然后上网查类似的问题,发现说是DNS问题,随将DNS改成8.8.8.8重启网络服务。yum立马OK.
分类:Web程序   时间:2015-06-09 20:14:54    阅读次数:149
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