CF#358 D. Alyona and Strings DP】的更多相关文章

D. Alyona and Strings 题意 给出两个字符串s,t,让找出最长的k个在s,t不相交的公共子串. 思路 看了好几个题解才搞懂. 代码中有注释 代码 #include<bits/stdc++.h> #define pb push_back using namespace std; typedef long long ll; const int N=1e5+10; const int mod=1e9+7; const int inf=0x3f3f3f3f; char s[N],t…
D. Alyona and Strings 题目连接: http://www.codeforces.com/contest/682/problem/D Description After returned from forest, Alyona started reading a book. She noticed strings s and t, lengths of which are n and m respectively. As usual, reading bored Alyona…
题目链接: D. Alyona and Strings time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output After returned from forest, Alyona started reading a book. She noticed strings s and t, lengths of which are n a…
题目链接:http://codeforces.com/contest/682/problem/D 给你两个字符串,求两个字符串中顺序k个的相同子串 长度之和.(注意是子串) dp[i][j][k][0] 表示a[i] == a[j]时,a字符串前i个和b字符串前j个,顺序k个相同的子串 长度之和 dp[i][j][k][1] 表示a[i] != a[j]时,顺序k个相同子串的长度之和 dp[i][j][k][0] = max(dp[i - 1][j - 1][k][0], dp[i - 1][j…
题目链接: 题目 D. Alyona and Strings time limit per test2 seconds memory limit per test256 megabytes inputstandard input outputstandard output 问题描述 After returned from forest, Alyona started reading a book. She noticed strings s and t, lengths of which are…
Alyona and Strings 题目链接: http://acm.hust.edu.cn/vjudge/contest/121333#problem/D Description After returned from forest, Alyona started reading a book. She noticed strings s and t, lengths of which are n and m respectively. As usual, reading bored Aly…
Codeforce 682 D. Alyona and Strings 解析(思維.DP) 今天我們來看看CF682D 題目連結 題目 略,請直接看原題. 前言 a @copyright petjelinux 版權所有 觀看更多正版原始文章請至petjelinux的blog 想法 首先會感覺應該是類似\(LCS\)的問題,但是有一點變形.因此我們會先想到應該是\(DP\),而可能會想到另外兩個狀態是: 共同部分是不是目前兩個字串前綴的結尾 最小的分段是幾段 也就是\(:dp[i][j][end]…
题目大概说给两个字符串s和t,然后要求一个包含k个字符串的序列,而这个序列是两个字符串的公共子序列,问这个序列包含的字符串的总长最多是多少. 如果用DP解,考虑到问题的规模,自然这么表示状态: dp[i][j][k]表示s[0...i]与t[0...j]包含k个字符串的公共子序列的最大总长 想怎么转移时,我发现这样表示状态不好转移,还得加一维: dp[i][j][k][0]表示s[0...i]与t[0...j]包含k个字符串的公共子序列的最大总长,且s[i]和t[j]不属于序列第k个字符串 dp…
time limit per test2 seconds memory limit per test256 megabytes inputstandard input outputstandard output After returned from forest, Alyona started reading a book. She noticed strings s and t, lengths of which are n and m respectively. As usual, rea…
1.CF #374 (Div. 2)    C.  Journey 2.总结:好题,这一道题,WA,MLE,TLE,RE,各种姿势都来了一遍.. 3.题意:有向无环图,找出第1个点到第n个点的一条路径,经过的点数要最多. #include<bits/stdc++.h> #define F(i,a,b) for (int i=a;i<b;i++) #define FF(i,a,b) for (int i=a;i<=b;i++) #define mes(a,b) memset(a,b,…