题目:给你一个n*n的01矩阵,求里面最大的1组成的矩形的米娜及. 分析:dp.单调队列.UVa 1330同题,仅仅是输入格式变了. 我们将问题分解成最大矩形.即求解以k行为底边的图形中的最大矩形.然后合并.求最大的矩形.                        预处理: 求出以每行为底边的每一列从底边開始向上的最大连续1的高度MaxH. O(N^2) : dp:对于每一层底边.我们利用单调队列求解出本行的最大矩形. O(N). 关于单调队列的求解分析,可參照zoj1985的题解: 整体时…

题目大意:这个也是和UVa 836 - Largest Submatrix差不多,修改一下数据就可以套用代码的. #include <cstdio> #include <cstring> #include <algorithm> using namespace std; #define MAXN 110 int mat[MAXN][MAXN], sum[MAXN][MAXN]; int main() { #ifdef LOCAL freopen("in&quo…

Largest Submatrix Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others) Total Submission(s): 2018    Accepted Submission(s): 967 Problem Description Now here is a matrix with letter 'a','b','c','w','x','y','z' and you ca…

Largest Submatrix of All 1’s Time Limit: 5000MS   Memory Limit: 131072K Total Submissions: 8551   Accepted: 3089 Case Time Limit: 2000MS Description Given a m-by-n (0,1)-matrix, of all its submatrices of all 1’s which is the largest? By largest we me…

Problem Description Now here is a matrix with letter 'a','b','c','w','x','y','z' and you can change 'w' to 'a' or 'b', change 'x' to 'b' or 'c', change 'y' to 'a' or 'c', and change 'z' to 'a', 'b' or 'c'. After you changed it, what's the largest sub…

Given a m-by-n (0,1)-matrix, of all its submatrices of all 1’s which is the largest? By largest we mean that the submatrix has the most elements. Input The input contains multiple test cases. Each test case begins with m and n (1 ≤ m, n ≤ 2000) on li…

codeforces 407D Largest Submatrix 3 题意 找出最大子矩阵,须满足矩阵内的元素互不相等. 题解 官方做法 http://codeforces.com/blog/entry/11333 \(O(n^6)\) 枚举子矩阵,暴力check. \(O(n^4)\) 枚举上下边界,双指针. \(O(n^3log_2n)\) 假设当前上边界 \(up\), 下边界 \(down\),\(R_i\) 表示当 \(i\) 为左边界时,右边界最大是 \(R_i\). 当 \(do…

Given a m-by-n (0,1)-matrix, of all its submatrices of all 1's which is the largest? By largest we mean that the submatrix has the most elements. Input The input contains multiple test cases. Each test case begins with m and n (1 ≤ m, n ≤ 2000) on li…

POJ 3494 Largest Submatrix of All 1’s Description Given a m-by-n (0,1)-matrix, of all its submatrices of all 1’s which is the largest? By largest we mean that the submatrix has the most elements. Input The input contains multiple test cases. Each tes…

Largest Submatrix of All 1’s Given a m-by-n (0,1)-matrix, of all its submatrices of all 1’s which is the largest? By largest we mean that the submatrix has the most elements. Input The input contains multiple test cases. Each test case begins with m …