tle弃疗了 等着回学校找个标程拍一下吧 #include <iostream> #include <cstdio> #include <cstring> #include <algorithm> #include <vector> using namespace std; typedef long long ll; inline int read(){ char c=getchar(); int x=0,f=1; while(c<'0'|…

A. 毛一琛 考虑到直接枚举的话时间复杂度很高,我们运用$meet\ in\ the\ middle$的思想 一般这种思想看似主要用在搜索这类算法中 发现直接枚举时间复杂度过高考虑枚举一半另一半通过其他算法统计,保证两边互不影响 今天的题我们考虑枚举先枚举左半部分,然后每个物品有三种取值情况 选入A集合,选入B集合,不选,系数不同 考虑完左半部分再去考虑右半部分,那么我们可以用哈系表先从将左半部分的答案统计出来 然后右半部分查询他的相反数注意去重 也可以用将两边状态都用结构体存下来 注意去重 思…

31 Rikka with Parenthesis II (六花与括号II) Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 65536/65536 K (Java/Others) Description 题目描述 As we know, Rikka is poor at math. Yuta is worrying about this situation, so he gives Rikka some math tasks to…

Rikka with Parenthesis II 题目链接: http://acm.hdu.edu.cn/showproblem.php?pid=5831 Description As we know, Rikka is poor at math. Yuta is worrying about this situation, so he gives Rikka some math tasks to practice. There is one of them: Correct parenthe…

Rikka with Parenthesis II 题目连接: http://acm.hdu.edu.cn/showproblem.php?pid=5831 Description As we know, Rikka is poor at math. Yuta is worrying about this situation, so he gives Rikka some math tasks to practice. There is one of them: Correct parenthe…

Rikka with Parenthesis II Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 65536/65536 K (Java/Others)Total Submission(s): 0    Accepted Submission(s): 0 Problem Description As we know, Rikka is poor at math. Yuta is worrying about this situat…

Rikka with Parenthesis II Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 65536/65536 K (Java/Others)Total Submission(s): 136    Accepted Submission(s): 97 Problem Description As we know, Rikka is poor at math. Yuta is worrying about this sit…

2016暑假多校联合---Rikka with Sequence (线段树) Problem Description As we know, Rikka is poor at math. Yuta is worrying about this situation, so he gives Rikka some math tasks to practice. There is one of them: Yuta has an array A with n numbers. Then he make…

Sequence II Problem Description   Mr. Frog has an integer sequence of length n, which can be denoted as a1,a2,⋯,an There are m queries. In the i-th query, you are given two integers li and ri. Consider the subsequence ali,ali+1,ali+2,⋯,ari. We can de…

Sequence II Time Limit: 9000/4500 MS (Java/Others)    Memory Limit: 131072/131072 K (Java/Others) Total Submission(s): 1422    Accepted Submission(s): 362 Problem Description Mr. Frog has an integer sequence of length n, which can be denoted as a1,a2…