[题目描述] 对一个序列A={a1, a2,..., an}给出函数: t1 t2 d(A) = max{ ∑ai + ∑aj | 1 <= s1 <= t1 < s2 <= t2 <= n } i=s1 j=s2求出该函数最大值. [题目链接] http://noi.openjudge.cn/ch0206/1481/ [算法] 类似股票买卖,决策一个i的位置,i之前的最大子段和和i+1及其之后的最大子段和的最大值.注意前i个最大子段和的求法:要记录一个前缀和最小值,注意初始…

Maximum sum Time Limit: 1000MS   Memory Limit: 65536K Total Submissions: 39599   Accepted: 12370 Description Given a set of n integers: A={a1, a2,..., an}, we define a function d(A) as below: Your task is to calculate d(A). Input The input consists o…

Maximum Sum 大意:给你一个n*n的矩阵,求最大的子矩阵的和是多少. 思路:最開始我想的是预处理矩阵,遍历子矩阵的端点,发现复杂度是O(n^4).就不知道该怎么办了.问了一下,是压缩矩阵,转换成最大字段和的问题. 压缩行或者列都是能够的. int n, m, x, y, T, t; int Map[1010][1010]; int main() { while(~scanf("%d", &n)) { memset(Map, 0, sizeof(Map)); for(i…

Maximum sum Time Limit: 1000MS   Memory Limit: 65536K Total Submissions: 44459   Accepted: 13794 Description Given a set of n integers: A={a1, a2,..., an}, we define a function d(A) as below: Your task is to calculate d(A). Input The input consists o…

Maximum sum Time Limit: 1000MS   Memory Limit: 65536K Total Submissions: 36100   Accepted: 11213 Description Given a set of n integers: A={a1, a2,..., an}, we define a function d(A) as below: tex=d%28A%29%3D%5Cmax_%7B1%5Cleq+s_1%5Cleq+t_1%3Cs_2%5Cleq…

1146. Maximum Sum Time limit: 0.5 secondMemory limit: 64 MB Given a 2-dimensional array of positive and negative integers, find the sub-rectangle with the largest sum. The sum of a rectangle is the sum of all the elements in that rectangle. In this p…

题目传送门 /* 最大子矩阵和:把二维降到一维,即把列压缩:然后看是否满足最大连续子序列: 好像之前做过,没印象了,看来做过的题目要经常看看:) */ #include <cstdio> #include <iostream> #include <cstring> #include <algorithm> using namespace std; ; const int INF = 0x3f3f3f3f; int a[MAXN][MAXN]; int dp[…

1146. Maximum Sum Time limit: 1.0 second Memory limit: 64 MB Given a 2-dimensional array of positive and negative integers, find the sub-rectangle with the largest sum. The sum of a rectangle is the sum of all the elements in that rectangle. In this…

In a given array nums of positive integers, find three non-overlapping subarrays with maximum sum. Each subarray will be of size k, and we want to maximize the sum of all 3*k entries. Return the result as a list of indices representing the starting p…

In a given array nums of positive integers, find three non-overlapping subarrays with maximum sum. Each subarray will be of size k, and we want to maximize the sum of all 3*k entries. Return the result as a list of indices representing the starting p…