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原创 Codeforces Round #576 (Div. 2) D （线段树+lazy-tag & 模拟）

D. Welfare Statetime limit per test2 secondsmemory limit per test256 megabytesinputstandard inputoutputstandard outputThere is a country with n citizens. The i-th of them initially has ai money. ...

2019-08-02 10:16:09 320

原创 ros/pcl 点云分割——分离地面

代码 #include <ros/ros.h>// PCL specific includes#include <sensor_msgs/PointCloud2.h>#include <pcl_conversions/pcl_conversions.h>#include <pcl/ros/conversions.h>#include ...

2018-10-18 16:25:59 3669

转载如何在ROS中使用PCL—数据格式

原博https://www.cnblogs.com/li-yao7758258/p/6651326.html 如何在ROS中使用PCL—数据格式（1）在ROS中点云的数据类型在ROS中表示点云的数据结构有： sensor_msgs::PointCloud sensor_msgs::PointCloud2 pcl::PointCloud<T>关于PC...

2018-10-18 16:06:55 986

原创 L2-012. 关于堆的判断（数据结构）

L2-012. 关于堆的判断时间限制400 ms内存限制65536 kB代码长度限制8000 B判题程序Standard作者陈越将一系列给定数字顺序插入一个初始为空的小顶堆H[]。随后判断一系列相关命题是否为真。命题分下列几种：“x is

2018-03-16 21:02:28 707

原创 L2-011. 玩转二叉树

L2-011. 玩转二叉树时间限制400 ms内存限制65536 kB代码长度限制8000 B判题程序Standard作者陈越给定一棵二叉树的中序遍历和前序遍历，请你先将树做个镜面反转，再输出反转后的层序遍历的序列。所谓镜面反转，是指将所有非叶结点的左

2018-03-15 19:56:22 313

原创 PAT-L2-004. 这是二叉搜索树吗？（数据结构）

L2-004. 这是二叉搜索树吗？时间限制400 ms内存限制65536 kB代码长度限制8000 B判题程序Standard作者陈越一棵二叉搜索树可被递归地定义为具有下列性质的二叉树：对于任一结点，其左子树中所有结点的键值小于该结点的键值

2018-03-11 19:16:25 342

原博：http://blog.youkuaiyun.com/qzc70919700/article/details/72983513###;1、数组的创建 [python] view plain copyintArr = [1, 4, 2, 5, 3, 7, 9, 0] #整型数组 strArr = ["北京", "上海", "杭州", "深圳"] #字符串数组 mixArr = [1, 3...

2018-03-10 12:01:52 544 1

原创 codeforces 893E Counting Arrays (组合数学)

E. Counting Arraystime limit per test3 secondsmemory limit per test256 megabytesinputstandard inputoutputstandard outputYou are given two positive integer numbe

2017-12-21 11:43:17 529

原创 codeforces 900D Unusual Sequences （数论）

D. Unusual Sequencestime limit per test1 secondmemory limit per test256 megabytesinputstandard inputoutputstandard outputCount the number of distinct sequences

2017-12-21 11:35:25 786

原创 codeforces 901B GCD of Polynomials （数论+构造）

B. GCD of Polynomialstime limit per test2 secondsmemory limit per test256 megabytesinputstandard inputoutputstandard outputSuppose you have two polynomials and

2017-12-21 11:27:37 862

原创磁盘调度算法（FCFS,SSTF,SCAN）

#includeusing namespace std;int a[2000]; //磁道位置 int n; //磁道数量 int begin; //初始位置 void init(){ srand(time(0)); n=(rand()%20)+1; // 0-1000 for(int i=0;i<n;i++) a[i]=(rand()%20)+1; //0-1000 be

2017-12-21 11:25:24 1788

原创最佳淘汰算法（OPT）先进先出的算法（FIFO）最近最久未使用算法（LRU）

#include#define Del(a,b) memset(a,b,sizeof(a))using namespace std;int a[4000]; //随机生成的页 int c;//用户页面容量 void init() //生成页 { srand(time(0)); for(int i=1;i<=320;i++) { int q=rand()%317; //a

2017-12-15 02:24:50 9301

原创银行家算法

银行家算法是用于解决死锁问题。相当于动态的模拟一个资源分配的过程，判断哪些可以运行，而后回收资源重复上两个过程直到所有进程都能完成。这里用队列模拟，先将所有进程放进队列，当满足条件出队同时回收资源当不满足，继续入队如果在资源未更新的情况下扫到一个进程两次，那么不存在安全序列。#include#define Del(a,b) memset(a,b,size

2017-12-15 02:18:26 548

转载例析Alpha-Beta剪枝

本文使用三子棋问题简单描述Alpha-Beta剪枝的原理。顺序是：先描述三子棋问题，接着描述三子棋问题的极小极大算法，最后描述三子棋问题的Alpha-Beta剪枝算法。对三子棋问题描述如下：下棋的一方是计算机（记为“MAX"，执棋子“X”），另一方是人（记为”MIN“，执棋子“O”）；机器先手，双方轮流在九宫格中落子；先取得三子一线的一方胜，可以是横向、

2017-12-06 15:46:58 2520

原创 hdu 1824 Let's go home (2-sate)

Let's go homeTime Limit: 10000/1000 MS (Java/Others) Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 2141 Accepted Submission(s): 925Problem Description小时候，乡愁是一枚小小的

2017-11-22 15:42:21 364

原创 poj 1741 Tree (点分治)

TreeTime Limit: 1000MS Memory Limit: 30000KTotal Submissions: 24493 Accepted: 8161DescriptionGive a tree with n vertices,each edge has a length(positive integer l

2017-10-09 16:26:45 325

原创开关灯类问题（高斯消元）

POJ 1222EXTENDED LIGHTS OUT#include#include#includeusing namespace std;int a[35][35];int x[35];void gauss(int n,int m){ int r=0,c=0; while(r<n&&c<m) { int t=r; for(int i=r+1;

2017-10-08 22:38:53 545

原创 lca 离线模板

struct node{ int v,w; node(){} node(int vv,int ww) { v=vv;w=ww; }};struct edge{ int u,v,lca; edge(){} edge(int uu,int vv,int ll) { u=uu,v=vv,lca=ll; }};vectorG;vectorv[50000];vec

2017-10-08 22:33:54 370

原创强联通 tarjan （模板）

struct tarjan{ const int maxn=50050; vectorv[maxn]; stackS; int dfn[maxn],low[maxn],viss[maxn]; int index,cnt; void init(int n) { for(int i=0;i<=n;i++) v[i].clear(); memset(dfn,0,sizeof(

2017-10-08 22:31:58 362

原创树状数组（模板）

struct szsz{ int c[maxn]; int lowbit(int x) { return x&(-x); } int getadd(int x) { int ans=0; while(x>0) { ans+=c[x]; x-=lowbit(x); } return ans; } void update(int x,int n,

2017-10-08 22:29:33 271

原创 HDU 4992 Primitive Roots (求原根)

Primitive RootsTime Limit: 4000/2000 MS (Java/Others) Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 949 Accepted Submission(s): 239Problem DescriptionWe say that

2017-09-22 00:23:09 560

原创 HDU - 2255 奔小康赚大钱（KM图）（KM图模板）

奔小康赚大钱Time Limit: 1000/1000 MS (Java/Others) Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 10674 Accepted Submission(s): 4723Problem Description传说在遥远的地方有一个非常富裕的村落

2017-09-22 00:14:10 440

原创 HDU - 4005 The war （双联通+缩点）

The warTime Limit: 2000/1000 MS (Java/Others) Memory Limit: 65768/65768 K (Java/Others)Total Submission(s): 2815 Accepted Submission(s): 673Problem DescriptionIn the war, the int

2017-09-22 00:04:05 468

原创 HDU - 3594 Cactus （强联通判断仙人掌树）

CactusTime Limit: 2000/1000 MS (Java/Others) Memory Limit: 65536/32768 K (Java/Others)Total Submission(s): 2194 Accepted Submission(s): 1034Problem Description1. It is a Strongly

2017-09-21 23:56:34 492

原创 CodeForces - 219D Choosing Capital for Treeland （树型dp）

D. Choosing Capital for Treelandtime limit per test3 secondsmemory limit per test256 megabytesinputstandard inputoutputstandard outputThe country Treeland consi

2017-09-21 23:35:40 383

原创 HDU 2196 Computer (树型dp/树直径)

ComputerTime Limit: 1000/1000 MS (Java/Others) Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 31005 Accepted Submission(s): 3895Problem DescriptionA school bought

2017-09-21 23:24:19 331

原创 HDU - 1520 Anniversary party （树dp）

Anniversary partyTime Limit: 2000/1000 MS (Java/Others) Memory Limit: 65536/32768 K (Java/Others)Total Submission(s): 12633 Accepted Submission(s): 5100Problem DescriptionThere i

2017-09-21 10:48:00 298

原创 poj 3321 Ultra-QuickSort （树状数组）

Apple TreeTime Limit: 2000MS Memory Limit: 65536KTotal Submissions: 30850 Accepted: 9235DescriptionThere is an apple tree outside of kaka's house. Every autumn, a

2017-09-19 00:15:25 581

原创 HDU - 4348 To the moon （主席树）

To the moonTime Limit: 4000/2000 MS (Java/Others) Memory Limit: 65536/65536 K (Java/Others)Total Submission(s): 6186 Accepted Submission(s): 1421Problem DescriptionBackgroundTo

2017-09-01 02:26:48 486

原创 SPOJ - COT Count on a tree （树上路径第K小，树上主席树）

Count on a tree SPOJ - COT You are given a tree with N nodes.The tree nodes are numbered from 1 to N.Each node has an integer weight.We will ask you to perform the following operation:u

2017-09-01 02:14:10 589

原创 ZOJ - 3195 Design the city（倍增法求解，tarjan离线求解）

Design the cityTime Limit: 1 Second Memory Limit: 32768 KBCerror is the mayor of city HangZhou. As you may know, the traffic system of this city is so terrible, that there are traffic jam

2017-09-01 02:00:38 556

原创 HDU - 2586 How far away ？（tarjan离线做法求lca）

How far away ？Time Limit: 2000/1000 MS (Java/Others) Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 17653 Accepted Submission(s): 6836Problem DescriptionThere are

2017-08-28 21:53:18 470

原创 HDU 6154 CaoHaha's staff

CaoHaha's staffTime Limit: 2000/1000 MS (Java/Others) Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 677 Accepted Submission(s): 400Problem Description"You shall n

2017-08-21 22:36:40 327

原创 HDU-6153 A Secret (扩展KMP)

A SecretTime Limit: 2000/1000 MS (Java/Others) Memory Limit: 256000/256000 K (Java/Others)Total Submission(s): 1855 Accepted Submission(s): 687Problem DescriptionToday is the bir

2017-08-21 22:30:55 454

原创 HDU-6152 Friend-Graph （思维+暴力）

Friend-GraphTime Limit: 10000/5000 MS (Java/Others) Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 1274 Accepted Submission(s): 657Problem DescriptionIt is well kn

2017-08-21 22:19:27 383

原创 HDU - 3861 The King’s Problem（强联通分量+最小路径覆盖）

The King’s ProblemTime Limit: 2000/1000 MS (Java/Others) Memory Limit: 65536/32768 K (Java/Others)Total Submission(s): 3156 Accepted Submission(s): 1111Problem DescriptionIn the

2017-08-14 03:24:41 571

原创 HDU - 3836 Equivalent Sets（强联通分量）

Equivalent SetsTime Limit: 12000/4000 MS (Java/Others) Memory Limit: 104857/104857 K (Java/Others)Total Submission(s): 4781 Accepted Submission(s): 1720Problem DescriptionTo prov

2017-08-14 01:35:43 423

原创 HDU 6106 (2017 多校训练赛6 1011）Classes

2017 Multi-University Training Contest - Team 6 1011ClassesTime Limit: 2000/1000 MS (Java/Others) Memory Limit: 65536/65536 K (Java/Others)Total Submission(s): 0 Accepted Submission(s)

2017-08-10 17:29:42 548

原创 HDU 6105 (2017 多校训练赛6 1010）Gameia（博弈）

2017 Multi-University Training Contest - Team 6 1010GameiaTime Limit: 2000/1000 MS (Java/Others) Memory Limit: 65536/65536 K (Java/Others)Total Submission(s): 0 Accepted Submission(s):

2017-08-10 17:23:12 802

原创 HDU 4417 Super Mario（主席树）

Super MarioTime Limit: 2000/1000 MS (Java/Others) Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 6955 Accepted Submission(s): 2997Problem DescriptionMario is world

2017-08-09 20:39:38 417

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