杭电 1159 Common Subsequence

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杭电 1159 Common Subsequence

Problem Description A subsequence of a given sequence is the given sequence with some elements (possible none) left out. Given a sequence X = <x1, x2, ..., xm> another sequence Z = <z1, z2, ..., zk> is a subsequence of X if there exists a stri…

杭电1159 Common Subsequence【最长公共子序列】

题目链接:http://acm.hdu.edu.cn/showproblem.php?pid=1159 解题思路:任意先给出两个字符串 abcfbc abfcab,用dp[i][j]来记录当前最长的子序列,则如果有x[i]与y[j]相等的话,则相当于公共子序列的长度在dp[i-1][j-1]上增加1, 如果x[i]与y[j]不相等的话,那么dp[i][j]就取得dp[i][j-1]和dp[i-1][j]中的最大值即可.时间复杂度为O(mn) 反思:大概思路想出来之后,因为dp数组赋初值调了很久,…

HDU 1159 Common Subsequence

HDU 1159 题目大意:给定两个字符串,求他们的最长公共子序列的长度解题思路:设字符串 a = "a0,a1,a2,a3...am-1"(长度为m), b = "b0, b1, b2, b3 ... bn-1"(长度为n), 它们的最长公共子序列为c = "c0, c1, c2, ... ck-1",长度为k, dp[i][j]定义为子串 "a0,a1,...,ai-1" 和子串"b0,b1,...,bj-1…

HDU 1159 Common Subsequence 公共子序列 DP 水题重温

题目链接:http://acm.hdu.edu.cn/showproblem.php?pid=1159 Common Subsequence Time Limit: 2000/1000 MS (Java/Others) Memory Limit: 65536/32768 K (Java/Others)Total Submission(s): 18201 Accepted Submission(s): 7697 Problem Description A subsequence of…

hdu 1159 Common Subsequence（最长公共子序列）

题目链接:http://acm.hdu.edu.cn/showproblem.php?pid=1159 Common Subsequence Time Limit: 2000/1000 MS (Java/Others) Memory Limit: 65536/32768 K (Java/Others)Total Submission(s): 37551 Accepted Submission(s): 17206 Problem Description A subsequence of…

hdu 1159 Common Subsequence(最长公共子序列 DP)

题目链接:http://acm.hdu.edu.cn/showproblem.php?pid=1159 Common Subsequence Time Limit: 2000/1000 MS (Java/Others) Memory Limit: 65536/32768 K (Java/Others)Total Submission(s): 25416 Accepted Submission(s): 11276 Problem Description A subsequence of…

HDOJ 1159 Common Subsequence【DP】

HDOJ 1159 Common Subsequence[DP] Time Limit: 2000/1000 MS (Java/Others) Memory Limit: 65536/32768 K (Java/Others) Total Submission(s): 44280 Accepted Submission(s): 20431 Problem Description A subsequence of a given sequence is the given sequence wit…