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Longest Palindromic Substring -LeetCode
题目 Given a string s,find the longest palindromic substring in S.You may assume that the maximum length of S is 1000,and there exist one unique longes....
分类:其他好文   时间:2014-09-17 21:46:02    阅读次数:238
longest incresing sequence
动态规划基本题目,longest incresing sequence,找出序列中的最长递增子序列;例如给出序列{8,3,5,2,4,9,7,11},其中最长递增子序列为{3,5,9,11}或{3,5,7,11}或{3,4,9,11}或{3,4,7,11},子序列按元素递增,序列长度都为4;子问题:...
分类:其他好文   时间:2014-09-17 21:36:52    阅读次数:231
Leetcode_num2_Maximum Depth of Binary Tree
题目: Given a binary tree, find its maximum depth. The maximum depth is the number of nodes along the longest path from the root node down to the farthest leaf node. AC率第二高的题啦,二项树的最长路径。初看此题...
分类:其他好文   时间:2014-09-17 20:26:52    阅读次数:162
Codeforces Round #265 (Div. 2) C. No to Palindromes!
Paul hates palindromes. He assumes that string s is tolerable if each its character is one of the first p letters of the English alphabet and s doesn't contain any palindrome contiguous substring ...
分类:其他好文   时间:2014-09-17 18:47:02    阅读次数:247
js 判断字符串是否包含某字符串
js 判断字符串是否包含某字符串,String对象中查找子字符,indexOf var test= "aa";   if(test.indexOf("a") > 0 ) {     } indexOf用法:  返回 String 对象内第一次出现子字符串的字符位置。         strObj.indexOf(subString[, startIndex])    ...
分类:Web程序   时间:2014-09-16 17:25:00    阅读次数:216
LeetCode Maximum Depth of Binary Tree
Given a binary tree, find its maximum depth.The maximum depth is the number of nodes along the longest path from the root node down to the farthest le...
分类:其他好文   时间:2014-09-16 00:15:49    阅读次数:196
EL表达式截取字符串
${wjcd.lrsj}原来得到的是如2006-11-12 11:22:22.0${fn:substring(wjcd.lrsj, 0, 16)}使用functions函数来获取list的长度${fn:length(list)} fn:contains(string, substring) ...
分类:其他好文   时间:2014-09-15 22:34:29    阅读次数:317
最长公共子串
最长公共子串(Longest Common Substring)是一个非常经典的问题,它的基本描述为“给定两个字符串,求出它们之间最长的相同子字符串(要求连续)的长度”。求N个最长为L的字符串的的LCS的方法大致可分为以下几类:1.枚举法显然是简单但极端低效的算法,改进一些的算法是用一个串的每个后缀对其他所有串进行部分匹配,用KMP算法,时间复杂度为O(NL2)。2.动态规划解法:平方的时间算法。3.后缀数组与高度数组解法,利用二分查找技术,时间复杂度为O(NLlogL)。3.广义后缀树方法,时间复杂度为可...
分类:其他好文   时间:2014-09-15 21:22:49    阅读次数:389
LeetCode 29 Substring with Concatenation of All Words
You are given a string, S, and a list of words, L, that are all of the same length. Find all starting indices of substring(s) in S that is a concatenation of each word in L exactly once and without an...
分类:其他好文   时间:2014-09-15 14:22:39    阅读次数:222
java 文件格式转换工具
有时候一个文件格式正确在某些情况下不一定能够正确播放,下面可以借助于java的一个类帮助我们把文件格式转正确 File source = new File(filepath); int index=amr.lastIndexOf("."); wavFile=amr.substring(0,index)+".wav"; File target = new File(wavFile); Au...
分类:编程语言   时间:2014-09-15 11:16:58    阅读次数:275
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