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hdu 4991(dp+树状数组)
题目连接:http://acm.hdu.edu.cn/showproblem.php?pid=4991 Ordered Subsequence Time Limit: 4000/2000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others) Total Submission(s): 221    Accepted Su...
分类:其他好文   时间:2014-09-10 15:56:40    阅读次数:145
【算法导论学习-29】动态规划经典问题02:最长公共子序列问题(Longest common subsequence,LCS)
问题描述:序列X={x1,x2,…,xn},Y={y1,y2,…,yn},当Z={z1,z2…,zn}是X的严格递增下标顺序(可以不连续)的子集,也是Y的严格递增下标顺序(可以不连续)的子集,则Z是X和Y的公共子序列。例如X={A,B,C,B,D,A,B},Y={B,D,C,A,B,A},{B,C,A}、{B,C,B,A}、{B,D,A,B}都是X和Y的公共子序列。其中最长的公共子序列叫做Long...
分类:其他好文   时间:2014-09-10 15:53:20    阅读次数:317
hdu 4991 Ordered Subsequence(dp+树状数组)
题目链接:hdu 4991 Ordered Subsequence 题目大意:给定一个序列,求有多少个子序列满足长度为m,并且递增。 解题思路:dp[i][j]表示说选了以第i个数为结尾,长度为j的递增子串方案数。将每个数离散化后用树状数组维护即可。 #include #include #include #include #define lowbit(x) ((x)&(-x...
分类:其他好文   时间:2014-09-10 12:37:10    阅读次数:235
Find longest contiguous sub array
It's still an Amazon interview question. Given an array containing only stars '*' and hashes '#' . Find longest contiguous sub array that will cont...
分类:其他好文   时间:2014-09-09 21:20:49    阅读次数:254
Leetcode 栈 Longest Valid Parentheses
Longest Valid Parentheses  Total Accepted: 14818 Total Submissions: 75749My Submissions Given a string containing just the characters '(' and ')', find the length of the longest valid (w...
分类:其他好文   时间:2014-09-09 13:18:18    阅读次数:166
Leetcode 细节实现 Longest Common Prefix
Longest Common Prefix  Total Accepted: 17298 Total Submissions: 63704My Submissions Write a function to find the longest common prefix string amongst an array of strings. 题意...
分类:其他好文   时间:2014-09-09 13:16:38    阅读次数:135
Longest Palindromic Substring
Given a string S, find the longest palindromic substring in S. You may assume that the maximum length of S is 1000, and there exists one unique longes...
分类:其他好文   时间:2014-09-09 12:14:08    阅读次数:200
Longest Substring Without Repeating Characters
Given a string, find the length of the longest substring without repeating characters. For example, the longest substring without repeating letters fo...
分类:其他好文   时间:2014-09-09 11:49:38    阅读次数:167
hdu 4991 Ordered Subsequence
Ordered SubsequenceTime Limit: 4000/2000 MS (Java/Others)Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 114Accepted Submission(s): 58Pr...
分类:其他好文   时间:2014-09-09 11:23:48    阅读次数:206
68. Longest Common Prefix
思路:两两字符串挨着找。水题。
分类:其他好文   时间:2014-09-09 10:47:58    阅读次数:173
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