1 问题描述 给定一个平面上n个点的集合,它的凸包就是包含所有这些点的最小凸多边形,求取满足此条件的所有点. 另外,形象生动的描述: (1)我们可以把这个问题看作如何用长度最短的栅栏把n头熟睡的老虎围起来. (2)也可以这样看:请把所讨论的点想象成钉在胶合板上的钉子,胶合板代表平面.撑开一根橡皮筋圈,把所有的钉子都围住,然后啪一声松开手.凸包就是以橡皮圈为边界的区域.具体示意如下图1所示: 2 解决方案 2.1 蛮力法 使用蛮力法解决此问题比较简单,具体思想:对于一个n个点集合中的两个点p1和p…

一.需求:计算网页访问量前三名 import org.apache.spark.rdd.RDD import org.apache.spark.{SparkConf, SparkContext} /** * 需求:计算网页访问量前三名 * 用户:喜欢视频 直播 * 帮助企业做经营和决策 * * 看数据 */ object UrlCount { def main(args: Array[String]): Unit = { //1.加载数据 val conf:SparkConf = new Spa…

目录 1 问题描述 2 解决方案 2.1 蛮力法 1 问题描述 给定一个平面上n个点的集合,它的凸包就是包含所有这些点的最小凸多边形,求取满足此条件的所有点. 另外,形象生动的描述: (1)我们可以把这个问题看作如何用长度最短的栅栏把n头熟睡的老虎围起来. (2)也可以这样看:请把所讨论的点想象成钉在胶合板上的钉子,胶合板代表平面.撑开一根橡皮筋圈,把所有的钉子都围住,然后啪一声松开手.凸包就是以橡皮圈为边界的区域.具体示意如下图1所示: 图1  用橡皮筋来解释凸包 2 解决方案 2.1 蛮力法…

Java基础常见英语词汇(共70个) ['ɔbdʒekt] ['ɔ:rientid]导向的                             ['prəʊɡræmɪŋ]编程 OO: object-oriented ,面向对象 OOP: object-oriented programming,面向对象编程 [dɪ'veləpmənt][kɪt]工具箱                              ['vɜːtjʊəl]虚拟的 JDK:Java development kit, j…

Wall Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 65536/32768 K (Java/Others)Total Submission(s): 3139    Accepted Submission(s): 888 Problem Description Once upon a time there was a greedy King who ordered his chief Architect to build a w…

最大三角形 Time Limit: 5000/2000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 3078    Accepted Submission(s): 1026 Problem Description 老师在计算几何这门课上给Eddy布置了一道题目,题目是这样的:给定二维的平面上n个不同的点,要求在这些点里寻找三个点,使他们构成的三角形拥有的面积最大.Eddy对这道…

链接:http://acm.hdu.edu.cn/showproblem.php?pid=4946 Area of Mushroom Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 65536/65536 K (Java/Others)Total Submission(s): 1896    Accepted Submission(s): 452 Problem Description Teacher Mai has a kingd…

链接:http://acm.hdu.edu.cn/showproblem.php?pid=1348 Wall Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 65536/32768 K (Java/Others)Total Submission(s): 3229    Accepted Submission(s): 919 Problem Description Once upon a time there was a greedy…

Surround the Trees Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 65536/32768 K (Java/Others)Total Submission(s): 10345    Accepted Submission(s): 4009 Problem Description There are a lot of trees in an area. A peasant wants to buy a rope to…

题目链接:http://acm.hdu.edu.cn/showproblem.php?pid=1348 Wall Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 65536/32768 K (Java/Others) Total Submission(s): 3386    Accepted Submission(s): 968 Problem Description Once upon a time there was a gre…