HDU5126 stars Problem Description John loves to see the sky. A day has Q times. Each time John will find a new star in the sky, or he wants to know how many stars between (x1,y1,z1) and (x2,y2,z2). Input The first line contains a single integer T(1≤T…

题目描述 题解: 和二维的比起来差不多. 但是这是四维偏序. 所以搞一下CDQ套CDQ. CDQ是维度a已经有序,按维度b排序,然后将维度c存入一维数据结构. 所以我们在第一层CDQ中分治处理,将合法的前一半打标记. 然后进入第二层CDQ,处理打标记的点对没打标记的点的影响. 可以说是将两维压成一维. 想法仍然是容斥. 代码: #include<cstdio> #include<cstring> #include<algorithm> using namespace s…

传送门 大意: 向三维空间中加点,询问一个三维区间中点的个数. 解题思路: 带修改CDQ,将修改和询问一起插入CDQ分治询问. (询问可以由8个前缀和加减操作实现) 其中第一层CDQ维护x有序. 第二层CDQ维护y有序并且将z离线处理完更新答案. 注意要将原数组的辅助数组推入第二层CDQ否则会将顺序毁坏. 代码: #include<cstdio> #include<cstring> #include<algorithm> ; ; struct data{ int t;…

传送门 题意: 先有两种操作,插入和查询,插入操作则插入一个点\((x,y,z)\),查询操作给出两个点\((x_1,y_1,z_1),(x_2,y_2,z_2)\),回答满足\(x_1\leq x\leq x_2,y_1\leq y\leq y_2,z_1\leq z\leq z_2\)的\((x,y,z)\)的个数为多少. 思路: 就是带修改的四维偏序问题. 首先我们可以将每个点看作三维空间中的一个点,那么每次询问就相当于询问立方体中的点. 我们将询问拆成\(8\)个询问,那么每次解决的就是…

序言 \(CDQ\) 分治和整体二分都是基于分治的思想,把复杂的问题拆分成许多可以简单求的解子问题.但是这两种算法必须离线处理,不能解决一些强制在线的题目.不过如果题目允许离线的话,这两种算法能把在线解法吊起来打(如树套树). 前置知识:分治 个人觉得分治的经典例子便是归并排序. 大家都知道,归并排序就是每次将区间 \([l,r]\) 拆分成 \([l,mid]\) 和 \([mid+1,r]\),然后再 \(O(n)\) 合并两个有序数组,再将 \([l,r]\) 的答案传到上一层去. 那么我…

题目大意:有$m$个操作,分两种:在指定三维坐标内加入一个点,询问指定空间内点的数量. 其中$m≤5*10^{4},1≤x,y,z≤10^9$ 这题几乎就是裸的$k-d$树啊.我们动态维护一棵$k-d$树,对于以某个节点为根的字树中,维护该子树中点的三维范围,以及该子树中点的数量.然后直接查询即可. PS:为了保证你的程序不会变成“优秀”的$n^{2}$做法,需要写一个类似虚树暴力重构的东西,去控制该树的平衡. #include<bits/stdc++.h> #define M 100000…

题目: poj 2352 Stars 数星星 题意:已知n个星星的坐标.每个星星都有一个等级,数值等于坐标系内纵坐标和横坐标皆不大于它的星星的个数.星星的坐标按照纵坐标从小到大的顺序给出,纵坐标相同时则按照横坐标从小到大输出. (0 <= x, y <= 32000) 要求输出等级0到n-1之间各等级的星星个数. 分析: 这道题不难想到n平方的算法,即从纵坐标最小的开始搜,每次找它前面横坐标的值比它小的点的个数,两个for循环搞定,但是会超时. 所以需要用一些数据结构去优化,主要是优化找 横坐…

Stars Time Limit: 1000MS   Memory Limit: 65536K Total Submissions: 30496   Accepted: 13316 Description Astronomers often examine star maps where stars are represented by points on a plane and each star has Cartesian coordinates. Let the level of a st…

Stars in Your Window Time Limit: 1000MS   Memory Limit: 65536K Total Submissions: 11706   Accepted: 3183 Description Fleeting time does not blur my memory of you. Can it really be 4 years since I first saw you? I still remember, vividly, on the beaut…

Applet程序. import javax.swing.*; import java.awt.*; import java.awt.geom.GeneralPath; @SuppressWarnings("serial") public class StarApplet extends JApplet { // Initialize the applet @Override public void init() { StarPane pane = new StarPane(); //…

题目描述 "But baby, I've been, I've been praying hard,     Said, no more counting dollars     We'll be counting stars" Grandpa Shaw loves counting stars. One evening he was sitting in his armchar, trying to figure out this problem. Consider the sky…

Stars Time Limit: 1000MS Memory Limit: 65536K Total Submissions: 39186 Accepted: 17027 Description Astronomers often examine star maps where stars are represented by points on a plane and each star has Cartesian coordinates. Let the level of a star b…

Stars Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 65536/32768 K (Java/Others)Total Submission(s): 4052    Accepted Submission(s): 1592 Problem Description Astronomers often examine star maps where stars are represented by points on a plan…

Stars in Your Window   Description Fleeting time does not blur my memory of you. Can it really be 4 years since I first saw you? I still remember, vividly, on the beautiful Zhuhai Campus, 4 years ago, from the moment I saw you smile, as you were walk…

Dancing Stars on Me Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 262144/262144 K (Java/Others)Total Submission(s): 186    Accepted Submission(s): 124 Problem Description The sky was brushed clean by the wind and the stars were cold in a bl…

Stars Time Limit: 1000MS Memory Limit: 65536K Total Submissions: 37323 Accepted: 16278 Description Astronomers often examine star maps where stars are represented by points on a plane and each star has Cartesian coordinates. Let the level of a star b…

YJC counts stars Time Limit: 20 Sec Memory Limit: 256 MB 题目连接 http://acm.hdu.edu.cn/showproblem.php?pid=5277 Description YJC是个老火车小司机.一个晚上,他仰望天空,星辰璀璨,他突然觉得,天空就像一个平面,而每一个星辰,就是平面中的一个点.他把这些点编号为1到n.这些点满足任意三点不共线.他把一些点用线段连起来了,但是任意两条线段不会在端点以外相交.如果一个点的集合中任意两个…

STARS的一般使用可以通过REGAL网页快速学习http://regionalanalysislab.org/?n=STARS再次不做详细介绍这里关注的主题是对STARS源代码分析即为使用Python直接从底层开发GIS的过程 STARS 0.8.2版本的下载链接中提供了两种类型:安装包和源代码包安装包可以直接安装运行,而源代码包可以通过Python编辑器编译后运行上述两种操作获得的效果是一样的 下载地址:1.安装包 http://prdownloads.sourceforge.net/sta…

STARS的全称是Space-Time Analysis of Regional Systems,直译过来就是区域系统时空分析软件.这是针对区域多时相数据的分析包,源代码公开.该软件将最近几年发展起来的时空分析技术引入到友好的用户界面中,设计目标是要成为一款探索性数据分析软件. 不得不说的是,探索性空间数据分析(ESDA)在国内才刚刚起步,而STARS面向的则是更为复杂的探索性时空数据分析(ESTDA).因而,多了解这样一个软件无异可以为国内GIS研究开辟一个新方向. 此软件为圣迭戈州立大学地理…

Stars Time Limit: 1000MS   Memory Limit: 65536K Total Submissions: 41521   Accepted: 18100 Description Astronomers often examine star maps where stars are represented by points on a plane and each star has Cartesian coordinates. Let the level of a st…

Dancing Stars on Me Time Limit: 20 Sec Memory Limit: 256 MB 题目连接 http://acm.hdu.edu.cn/showproblem.php?pid=5533 Description The sky was brushed clean by the wind and the stars were cold in a black sky. What a wonderful night. You observed that, somet…

题目链接:http://acm.hdu.edu.cn/showproblem.php?pid=5533 Dancing Stars on Me Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 262144/262144 K (Java/Others)Total Submission(s): 601    Accepted Submission(s): 320 Problem Description The sky was brush…

Stars Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 65536/32768 K (Java/Others)Total Submission(s): 6581    Accepted Submission(s): 2625 Problem Description Astronomers often examine star maps where stars are represented by points on a plan…

Description Fleeting time does not blur my memory of you. Can it really be 4 years since I first saw you? I still remember, vividly, on the beautiful Zhuhai Campus, 4 years ago, from the moment I saw you smile, as you were walking out of the classroo…

Description Astronomers often examine star maps where stars are represented by points on a plane and each star has Cartesian coordinates. Let the level of a star be an amount of the stars that are not higher and not to the right of the given star. As…

Problem Description Yifenfei is a romantic guy and he likes to count the stars in the sky. To make the problem easier,we considerate the sky is a two-dimension plane.Sometimes the star will be bright and sometimes the star will be dim.At first,there…

Stars Description Astronomers often examine star maps where stars are represented by points on a plane and each star has Cartesian coordinates. Let the level of a star be an amount of the stars that are not higher and not to the right of the given st…

wp 文章星级评价 插件 下载地址4:http://pan.baidu.com/s/1eQnGIGU ［articles_star_vote_score_optiontable_serialize_commentvote.zip］*推荐 最新 1.自定义表与 wp_options 表 2.修改插入数据库配置项,为serialize序列化的value值,在wp的options表中存储 3.增加暂停插件选项,增加comment评论时的打分,可以自定义开始 文章打分,评论时打分,或是暂停使用打分 --…

Stars Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 65536/32768 K (Java/Others)Total Submission(s): 6993    Accepted Submission(s): 2754 Problem Description Astronomers often examine star maps where stars are represented by points on a plan…

Problem Description The sky was brushed clean by the wind and the stars were cold in a black sky. What a wonderful night. You observed that, sometimes the stars can form a regular polygon in the sky if we connect them properly. You want to record the…