Max Points on a Line Given n points on a 2D plane, find the maximum number of points that lie on the same straight line. 点和方向确定一条直线. 需要两重循环,第一重循环遍历起始点a,第二重循环遍历剩余点b. a和b如果不重合,就可以确定一条直线. 对于每个点a,构建 斜率->点数 的map. (1)b与a重合,以a起始的所有直线点数+1 (用dup统一相加) (2)b与a不重…

作者: 负雪明烛 id: fuxuemingzhu 个人博客: http://fuxuemingzhu.cn/ 目录 题目描述 题目大意 解题方法 字典+最大公约数 日期 题目地址:https://leetcode.com/problems/max-points-on-a-line/description/ 题目描述 Given n points on a 2D plane, find the maximum number of points that lie on the same strai…

Given n points on a 2D plane, find the maximum number of points that lie on the same straight line. Example 1: Input: [[1,1],[2,2],[3,3]] Output: 3 Explanation: ^ | | o | o | o +-------------> 0 1 2 3 4 Example 2: Input: [[1,1],[3,2],[5,3],[4,1],[2,3…

Given n points on a 2D plane, find the maximum number of points that lie on the same straight line. 给一个由n个点组成的2D平面,找出最多的同在一条直线上的点的个数. 共线点的条件是斜率一样,corn case:点相同:x坐标相同. Java: public class Solution { public int maxPoints(Point[] points) { int res = 0; f…

Given n points on a 2D plane, find the maximum number of points that lie on the same straight line. 解题思路: 本题主要需要考虑到斜线的情况,可以分别计算出过points[i]直线最多含几个点,然后算出最大即可,由于计算points[i]的时候,前面的点都计算过了,所以不需要把前面的点考虑进去,所以问题可以转化为过points[i]的直线最大点的个数,解题思路是用一个HashMap储存斜率,遍历p…

Given n points on a 2D plane, find the maximum number of points that lie on the same straight line.  求二维平面上n个点中,最多共线的点数.     1.比较直观的方法是,三层循环,以任意两点划线,判断第三个点是否在这条直线上.   比较暴力   2.使用map来记录每个点的最大数目.   /** * Definition for a point. * class Point { * int x;…

作者: 负雪明烛 id: fuxuemingzhu 个人博客: http://fuxuemingzhu.cn/ 目录 题目描述 题目大意 解题方法 Java解法 Python解法 日期 [LeetCode] 题目地址:https://leetcode.com/problems/max-consecutive-ones/ Difficulty: Easy 题目描述 Given a binary array, find the maximum number of consecutive 1s in…

作者: 负雪明烛 id: fuxuemingzhu 个人博客: http://fuxuemingzhu.cn/ 目录 题目描述 题目大意 解题方法 虫取法/双指针 日期 题目地址:https://leetcode.com/problems/max-consecutive-ones-iii/ 题目描述 Given an array A of 0s and 1s, we may change up to K values from 0 to 1. Return the length of the l…

作者: 负雪明烛 id: fuxuemingzhu 个人博客: http://fuxuemingzhu.cn/ 目录 题目描述 题目大意 解题方法 方法一:DFS 方法二:BFS 日期 题目地址:https://leetcode.com/problems/max-area-of-island/description/ 题目描述 Given a non-empty 2D array grid of 0's and 1's, an island is a group of 1's (represen…

作者: 负雪明烛 id: fuxuemingzhu 个人博客: http://fuxuemingzhu.cn/ 题目地址: https://leetcode.com/problems/max-sum-of-rectangle-no-larger-than-k/description/ 题目描述: Given a non-empty 2D matrix matrix and an integer k, find the max sum of a rectangle in the matrix su…