public static int maximalRectangle(char[][] matrix) { int rowNum=matrix.length; if(rowNum==0) return 0; int columnNum=matrix[0].length; int[][] height=new int[rowNum][columnNum+1]; int maxarea=0; for(int i=0;i<rowNum;i++) { for(int j=0;j<columnNum;j…

Given n non-negative integers representing the histogram's bar height where the width of each bar is 1, find the area of largest rectangle in the histogram. Above is a histogram where width of each bar is 1, given height =[2,1,5,6,2,3]. The largest r…

思路: 分别按行拆分后将这一行之前的每列叠加起来,然后使用leetcode84https://www.cnblogs.com/wangyiming/p/9620942.html的思路计算. 实现: #include <bits/stdc++.h> using namespace std; class Solution { public: int maximalRectangle(vector<vector<char>>& matrix) { ) ; ].size…

之前切了道求解最大正方形的题,题解猛戳 这里.这道题 Maximal Rectangle 题意与之类似,但是解法完全不一样. 先来看这道题 Largest Rectangle in Histogram,如果暴力求解,可以枚举每个点为最小值,向两边扩展,复杂度 O(n^2).我们可以维护一个栈,从而将复杂度降低到 O(n),这个栈的思维非常巧妙,参考了 discuss,我是完全想不出来(或者说忘记了).具体代码可以猛戳 这里. 2016-08-07 补:stack 数组维护的是一个单调递增的数组,…

1. Maximal Square 题目链接 题目要求: Given a 2D binary matrix filled with 0's and 1's, find the largest square containing all 1's and return its area. For example, given the following matrix: Return 4. 在GeeksforGeeks有一个解决该问题的方法: 1) Construct a sum matrix S[R…

Maximal RectangleGiven a 2D binary matrix filled with 0's and 1's, find the largest rectangle containing all ones and return its area. Show TagsHave you met this question in a real interview? Yes  NoDiscussSOLUTION 1: public class Solution { public i…

85. Maximal Rectangle Given a 2D binary matrix filled with 0's and 1's, find the largest rectangle containing only 1's and return its area. For example, given the following matrix: 1 0 1 0 0 1 0 1 1 1 0 0 1 0 Return 6.…

Maximal Rectangle Given a 2D binary matrix filled with 0's and 1's, find the largest rectangle containing all ones and return its area.     使用dpHeight[]数组来记录到第i行为止,第j个位置垂直连续包含多少个1(包括matrxi[i][j]).如: 1 0 1 1 0 1 1 0 1 0 0 1 1 1 1 有如下结果: 第1行: dpHeight[…

Given a 2D boolean matrix filled with False and True, find the largest rectangle containing all True and return its area. ExampleGiven a matrix: [ [1, 1, 0, 0, 1], [0, 1, 0, 0, 1], [0, 0, 1, 1, 1], [0, 0, 1, 1, 1], [0, 0, 0, 0, 1]]return 6. LeetCode上…

Largest Rectangle in Histogram Given n non-negative integers representing the histogram's bar height where the width of each bar is 1, find the area of largest rectangle in the histogram. Above is a histogram where width of each bar is 1, given heigh…