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…

称号: Maximal Square 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: 1 0 1 0 0 1 0 1 1 1 1 1 0 0 1 0 Return 4. 分析: 利用动态规划求解.建立一个类node.node中成员变量le…

本来也想像园友一样,写一篇总结告别 2015,或者说告别即将过去的羊年,但是过去一年发生的事情,实在是出乎平常人的想象,也不具有代表性,于是计划在今年 6 月份写一篇 "半年总结",希望不会忘记.羊年,还是以一道有意思的算法题来告别吧! Maximal Square,又是一道有意思的题.给出一个二维数组,数组中的元素是 1 或者 0,求解最大的由 1 组成的正方形面积. 比如这样一个二维数组: 1 0 1 0 0 1 0 1 1 1 1 1 1 1 1 1 0 0 1 0 很显然最大的…

Maximal Square Given a 2D binary matrix filled with 0's and 1's, find the largest square containing only 1's and return its area. Example: Input: 1 0 1 0 0 1 0 1 1 1 1 1 1 1 1 1 0 0 1 0 Output: 4 解 动态规划,设\(dp[i][j]\)表示下标为(i, j)的左上角区域的最大正方形面积,当\(\math…

Given a 2D binary matrix filled with 0's and 1's, find the largest square containing all 1's and return its area. Have you met this question in a real interview?     Example For example, given the following matrix: 1 0 1 0 0 1 0 1 1 1 1 1 1 1 1 1 0 0…

问题描述: 题目链接:221 Maximal Square 问题找解决的是给出一个M*N的矩阵, 只有'1', '0',两种元素: 需要你从中找出 由'1'组成的最大正方形.恩, 就是这样. 我们看到, 这道题目的标签还是DP, 那么问题的关键就是要找到一个符合判断是否为正方形的递推式. 老套路, 先看基本型, 对于一个2*2的正方形,对于右下角的元素(1,1)而言, 他的上(0,1), 左(1,0), 左上(0,0)三个元素应该都是'1', 如此才能够组成一个合规的正方形: 那么如果是一个3*…

Maximal Square 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: 1 0 1 0 0 1 0 1 1 1 1 1 0 0 1 0 Return 4. Credits:Special thanks to @Freezen for…

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: 1 0 1 0 0 1 0 1 1 1 1 1 0 0 1 0 Return 4. public class Solution { public int maximalSquare(char…

Given a 2D binary matrix filled with 0's and 1's, find the largest square containing only 1's and return its area. Example: Input: 1 0 1 0 0 1 0 1 1 1 1 1 0 0 1 0 Output: 4 dp[i][j] = min(dp[i-1][j-1],min(dp[i-1][j],dp[i][j-1]))+1; class Solution { p…

2018-09-13 19:19:44 问题描述: 问题求解: 方法一: 使用动态规划来求解,算法时间复杂度O(n^2). dp[i][j] : 以(i, j)为右下角的面积最大的正方形的边长. 初始条件:最上面一行,最左边一列,可以直接得到dp值. 更新公式:matrix[i][j] == '0' - > dp[i][j] = 0    matrix[i][j] == '1' - > dp[i][j] = min(dp[i - 1][j], dp[i - 1][j - 1], dp[i][j…