题目链接:51nod 1051 最大子矩阵和 实质是把最大子段和扩展到二维.读题注意m,n... #include<cstdio> #include<cstring> #include<vector> #include<algorithm> #define CLR(a,b) memset((a),(b),sizeof((a))) using namespace std; ; int dp[N][N]; int main(){ int n, m, i, j,…
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…
To the Max Description Given a two-dimensional array of positive and negative integers, a sub-rectangle is any contiguous sub-array of size 1*1 or greater located within the whole array. The sum of a rectangle is the sum of all the elements in that…
题意:求最大子矩阵和 利用dp[i]每次向下更新,构成竖起的单条矩阵,再按不小于零就加起来来更新,构成更大的矩阵 #include <iostream> #include<cstdio> #include<cstring> using namespace std; #define N 110 int map[N][N],dp[N]; int main(int argc, char** argv) { int n,i,j,k,maxn,ans; while(scanf(&…