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zoj 1788 先输入初始化MAP ,然后要根据MAP 建立一个四分树,自下而上建立,先建立完整的一棵树,然后根据四个相邻的格 值相同则进行合并,(这又是递归的伟大),逐次向上递归 四分树建立完后,再进行一深度优先遍历,生成二进制字符串,再转化为16进制输出 //#include "stdafx.h" #include <string.h> #include <string> #include <queue> #include <iostre…
A quadtree is a tree data in which each internal node has exactly four children: topLeft, topRight, bottomLeft and bottomRight. Quad trees are often used to partition a two-dimensional space by recursively subdividing it into four quadrants or region…
We want to use quad trees to store an N x N boolean grid. Each cell in the grid can only be true or false. The root node represents the whole grid. For each node, it will be subdivided into four children nodes until the values in the region it repres…
题目要求 We want to use quad trees to store an N x N boolean grid. Each cell in the grid can only be true or false. The root node represents the whole grid. For each node, it will be subdivided into four children nodes until the values in the region it r…
We want to use quad trees to store an N x N boolean grid. Each cell in the grid can only be true or false. The root node represents the whole grid. For each node, it will be subdivided into four children nodes until the values in the region it repres…
We want to use quad trees to store an N x N boolean grid. Each cell in the grid can only be true or false. The root node represents the whole grid. For each node, it will be subdivided into four children nodes until the values in the region it repres…
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 日期 题目地址:https://leetcode.com/problems/quad-tree-intersection/description/ 题目描述 A quadtree is a tree data in which each internal node has exactly four children: topLeft, topRigh…
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 日期 题目地址:https://leetcode.com/problems/construct-quad-tree/description/ 题目描述 We want to use quad trees to store an N x N boolean grid. Each cell in the grid can only be true or…
转自:https://aotu.io/notes/2017/02/16/2d-collision-detection/ 在 2D 环境下,常见的碰撞检测方法如下: 外接图形判别法 轴对称包围盒(Axis-Aligned Bounding Box),即无旋转矩形. 圆形碰撞 圆形与矩形(无旋转) 圆形与旋转矩形(以矩形中心点为旋转轴) 光线投射法 分离轴定理 其他 地图格子划分 像素检测 下文将由易到难的顺序介绍上述各种碰撞检测方法:外接图形判别法 > 其他 > 光线投射法 > 分离轴定理…
前面我们感觉ES就想是一个nosql数据库,支持Free Schema. 接触过Lucene.solr的同学这时可能会思考一个问题——怎么定义document中的field?store.index.analyzer等属性如何配置? 这时可以了解下ES中的Mapping. [reference] http://www.elasticsearch.org/guide/en/elasticsearch/reference/current/mapping.html#mapping Mapping is…