* 最大子矩阵 * sum[i][j] 表示第 i 行前 j 列的和,即每一行的前缀 * i,j 指针枚举列,k指针枚举行 * Now 记录当前枚举的子矩阵的价值 * 由于记录了前缀信息,一旦 Now < 0, Now = 0 * Max 变量在过程中取最大 #include <bits/stdc++.h> ; int sum[N][N]; int n, m; #define gc getchar() inline int read() { , f = ; char c = gc; ;…
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 rectangle. I…