题目: 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. 本题为一个典型的动态规划问题,因此可以使用动态规划的思想进行. step1,初始化原始行和列 st…

题目: Given an array of integers and an integer k, find out whether there are two distinct indices i and j in the array such that nums[i] = nums[j] and the difference between i and jis at most k. 给定一个整形数组和一个整数型数k,找出在这个数组中是否存在两个相同的数,并且这两个数的下标的距离小于k. "&q…

题目 Given an array of integers, find if the array contains any duplicates. Your function should return true if any value appears at least twice in the array, and it should return false if every element is distinct. Subscribe to see which companies ask…

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. 动态规划求解: 设dp[i][j]表示以matrix[i][j]结尾的最大正方形,则初始化:dp[i][j…

题目: Given an integer, write a function to determine if it is a power of two. class Solution(object): def isPowerOfTwo(self, n): # """ :type n: int :rtype: bool """ 方法:分析2的幂次方的特点,发现2的任意次方的数,化成二进制时只有首位为1其余位为0,因此我的解决方法如下: class…

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*…

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 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…

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…

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…