1. 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 large…

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…

作者: 负雪明烛 id: fuxuemingzhu 个人博客: http://fuxuemingzhu.cn/ 题目地址: https://leetcode.com/problems/maximal-rectangle/description/ 题目描述: Given a 2D binary matrix filled with 0's and 1's, find the largest rectangle containing only 1's and return its area. Exa…

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. [题目分析] 这个问题是要在一个0-1矩阵中找到由1构成的最大最大的矩阵的面积. [思路] 如何下手呢?…

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.…

一.题目说明 题目,85. Maximal Rectangle,计算只包含1的最大矩阵的面积.难度是Hard! 二.我的解答 看到这个题目,我首先想到的是dp,用dp[i][j]表示第i行第j列元素向右下角计算的最大面积.后来发现从dp[i+1][j].dp[i][j+1]和dp[i+1][j+1]计算dp[i][j]几乎没有任何规律可循. 然后,我就想用down_dp[i][j]和right_dp[i][j]两个dp,但遗憾的是还是没成功. 后面看了大神的写法,其实down_dp[i][j]然…

链接: https://leetcode.com/problems/maximal-rectangle/ [描述] Given a 2D binary matrix filled with '0's and '1's, find the largest rectangle containing all ones and return its area. [中文描述] 给一个二维数组, 算出里面最大的全1矩形面积,比如: [ ['1','1','1','0'], ['1','1','1','1']…

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…

给定一个只含0和1的数组,求含1的最大矩形面积. Given a 2D binary matrix filled with 0's and 1's, find the largest rectangle containing all ones and return its area. 这样的题一般看来都是有O(n*m)的解法的. 借助上一题Largest Rectangle in Histogram 的解法. 我们现在把矩阵的每一行当做是上一题的问题,然后遍历所有的行数,取最大数就是解. 这里的…

Given a 2D binary matrix filled with 0's and 1's, find the largest rectangle containing all ones and return its area. 思路: 例如 01101 11010 01110 11110 11111 00000 按列从上到下计算maximal rectangle: 01101 12010 03110 14210 25321 00000 然后对每一行求直方图的最大面积,于是这个问题可以转化…