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[Leetcode] Word BreakII
Question:Given a stringsand a dictionary of wordsdict, add spaces insto construct a sentence where each word is a valid dictionary word.Return all suc...
分类:其他好文   时间:2014-06-16 06:22:37    阅读次数:246
[LeetCode] Longest Valid Parentheses
第一种方法,用栈实现,最容易想到,也比较容易实现,每次碰到‘)’时update max_len,由于要保存之前的‘(’的index,所以spacecomplexity 是O(n) 1 // 使用栈,时间复杂度 O(n),空间复杂度 O(n) 2 class Solution { 3 publ...
分类:其他好文   时间:2014-06-11 09:16:10    阅读次数:197
【leetcode】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 no...
分类:其他好文   时间:2014-06-10 18:36:29    阅读次数:193
Valid Number
题目 Validate if a given string is numeric. Some examples: "0" => true " 0.1 " => true "abc" => false "1 a" => false "2e10" => true Note: It is intended for the problem statement t...
分类:其他好文   时间:2014-06-10 17:32:23    阅读次数:174
LeetCode:Generate Parentheses
题目链接Givennpairs of parentheses, write a function to generate all combinations of well-formed parentheses.For example, givenn= 3, a solution set is:"((...
分类:其他好文   时间:2014-06-09 15:11:33    阅读次数:212
00微信公众平台 - 以上五大功能整合,完整的代码。
一、代码实现如下(主程序代码,其他include代码见各个功能函数中)responseMsg();//$wechatObj->valid();class wechatCallbackapiTest{ public function valid() { $echoStr = ...
分类:微信   时间:2014-06-08 20:54:23    阅读次数:704
malloc()参数为0的情况
下面的代码片段输出是什么?为什么? char *ptr; if((ptr = (char *)malloc(0))==NULL) puts("Got a null pointer"); else puts("Got a valid pointer");  解析:......故意把0值传给了函数malloc,得到了一个合法的指针,这就是上面的代码,该代码的输出是"Got ...
分类:其他好文   时间:2014-06-08 17:11:28    阅读次数:285
[LeetCode] Valid Palindrome [10]
题目:For example,"A man, a plan, a canal: Panama" is a palindrome. "race a car" is not a palindrome. 解题思路:验证一个字符串是否是回文字符串。首先看看wiki上对于回文的解释:回文,亦称回环,是正读反读都能读通的句子,亦有将文字排列成圆圈者,Famous examples include "Amore, Roma", "A man, a plan, a canal: Panama" and "No 'x' in...
分类:其他好文   时间:2014-06-08 16:30:29    阅读次数:235
Restore IP Addresses
题目 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", "255.255.111.3...
分类:其他好文   时间:2014-06-08 10:37:47    阅读次数:273
[Leetcode] Evaluate Reverse Polish Notation
Evaluate the value of an arithmetic expression in Reverse Polish Notation.Valid operators are +, -, *, /. Each operand may be an integer or another ex...
分类:其他好文   时间:2014-06-07 20:34:41    阅读次数:214
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