Gym - 102307C Common Subsequence 题意:给你两个相同长度的DNA序列,判断这两个的最长公共子序列长度是不是0.99*n,n为序列的长度(n<=1e5). 嗯,正常dp的想法是n2,肯定是会超时的,那么我们把目光放到0.99*n这里,反过来不就是最多只能失配0.01*n,最大也就是1000个字符. 所以接下来就是不看大佬做法,自己完全没想到的dp设法.dp[i][j]就代表s1串抛弃了i个字符,s2抛弃了j个字符的最长公共子序列长度. 那么此时,s1串已经匹配了的序…

2019 ICPC Universidad Nacional de Colombia Programming Contest C D J   C. Common Subsequence 题意:给出长度为n两个串,求两个串的最长公共子序列len,如果len>=0.99*n,两个串就是亲兄弟否则不是. 解法:朴素的求LCS的时间复杂度是O(nm),这题肯定超时.正解不容易想,要注意到0.99这个特点,我们从这个特点下手也就是说最多只能抛弃0.01*n=1000个字符, 那么我们设dp[i][j]为A…

Common Subsequence Time Limit: 2 Sec  Memory Limit: 64 MBSubmit: 951  Solved: 374 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…

Common Subsequence Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 65536/32768 K (Java/Others)Total Submission(s): 39559    Accepted Submission(s): 18178 Problem Description A subsequence of a given sequence is the given sequence with some el…

Common Subsequence Time Limit: 1000MS   Memory Limit: 10000K Total Submissions: 65333   Accepted: 27331 Description A subsequence of a given sequence is the given sequence with some elements (possible none) left out. Given a sequence X = < x1, x2, ..…

Problem C: Longest Common Subsequence Sequence 1: Sequence 2: Given two sequences of characters, print the length of the longest common subsequence of both sequences. For example, the longest common subsequence of the following two sequences: abcdgh…

题目链接 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…

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] 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…

题目链接:http://poj.org/problem?id=1458 Common Subsequence Time Limit: 1000MS   Memory Limit: 10000K Total Submissions: 55099   Accepted: 22973 Description A subsequence of a given sequence is the given sequence with some elements (possible none) left ou…