Problem C.   The Problem Needs 3D Arrays Time Limit: 6000MS Memory Limit: 262144KB 64bit IO Format: %I64d & %I64u Description A permutation is a sequence of integers p1,p2,...,pn, consisting of n distinct positive integers and each of them does not e…

TK在大多数 Unix平台.Windows平台和Macintosh系统都是预装好的,TKinter 模块是 Tk GUI 套件的标准Python接口.可实现Python的GUI编程. Tkinter模块("Tk 接口")是python的标准Tk GUI工具包的接口.Tk和Tkinter可以在大多数的Unix平台下使用,同样可以应用在Windows和Macintosh系统里.Tk8.0的后续版本可以实现本地窗口风格,并良好地运行在绝大多数平台中.(百度百科) 一般的环境里直接import…

The Problem Needs 3D Arrays 题意:给你n个数, 然后1-n的数, 然后要求按顺序选出m个数, 求 逆序数/m 个数的 最大值是多少. 题解:裸的最大密度子图.逆序的2个数建边, 跑一下最大密度子图就AC了. #include<bits/stdc++.h> using namespace std; #define Fopen freopen("_in.txt","r",stdin); freopen("_out.txt…

最大密度子图裸题,详情请见胡博涛论文: https://wenku.baidu.com/view/986baf00b52acfc789ebc9a9.html 不加当前弧优化t到死= = //#pragma comment(linker, "/stack:200000000") //#pragma GCC optimize("Ofast,no-stack-protector") //#pragma GCC target("sse,sse2,sse3,ssse…

题意:给一段子序列,定义密度:子序列中的逆序对数/子序列的长度 求这个序列的对大密度. 分析:将序列中的每个位置视作点,逆序对\(<i,j>\)之间表示点i与点j之间有一条无向边.所以就转化为了最大密度子图的模型. #include<bits/stdc++.h> using namespace std; #define eps 1e-7 #define INF 0x3f3f3f3f const int MAXN=1010;//点数的最大值 const int MAXM=400010…

题目链接 题意 给出n个点,每个点有一个值,现在要选择一些点的集合,使得(选择的点生成的逆序对数目)/(选择的点的数量)的比率最大. 思路 点与点之间生成一个逆序对可以看做是得到一个边,那么就是分数规划问题|E|/|V|,即求最大密度子图. 先处理出所有的逆序对,然后把这些逆序对看作边. 二分枚举 h(g) = |E| - g * |V|中的g,h(g)为递减函数,把g看做点权,转化为最大权闭合图处理,当 h(g) 为0时,得到最优解,这时候的g就是答案. #include <bits/stdc…

Problem B. Geometry ProblemTime Limit: 20 Sec Memory Limit: 256 MB 题目连接 http://acm.hust.edu.cn/vjudge/contest/view.action?cid=88926#problem/B Description Peter is studying in the third grade of elementary school. His teacher of geometry often gives h…

依然是回文树. 我们只需要吧siz[]改成统计两边的siz[][0/1],然后把两个字符中间随便加一个不会出现的字符拼起来,做一遍回文树统计一下就OJBK了 #include<bits/stdc++.h> #define ll unsigned long long using namespace std; const int maxn=500005; int T,n,len[maxn],sum[maxn][2],zt,m,p; int ch[maxn][27],fl[maxn],cnt,now…

题意:Bob和Alice在一张有向无环图上移动,给定二者的起点,Bob先手.Bob的失败条件是不能移动或者与Alice相遇.两个人都采取最优策略,求Bob是否会赢 分析:银牌题.先确定所有的失败状态,然后根据这些反向状态BFS. 用\(dp[i][j][0or1]\)表示bob在i点,Alice在j点,当前移动的人是bob还是Alice的情况, bob是否必败. 首先能确定的是 \(dp[i][j][0] = dp[i][j][1] = 0\), 对于出度为0的点\(i\),\(dp[i][j]…

全文转载自 Scott Hanselman的博文. I bought a 3D printer on Friday, specifically a Printrbot Simple Metal from Amazon for US$599. I did a few days of research, looking at all the consumer models under $1000. Some were enclosed, others not. Some made of wood,…

893E - Counting Arrays 思路:质因子分解. 对于每个质因子,假设它有k个,那么求把它分配到y个数上的方案数. 相当于把k个小球分配到y个盒子里的方案数. 这个问题可以用隔板法(插空法)解决,要把一段分成y段,需要y-1个隔板,那么有y-1+k个位置,选y-1个位置为隔板,剩下的都是小球,那么方案数为C(y-1+k,y-1). 如果全为正数,答案就是所有质因子方案数的积. 但是这道题目可以为负数,那么在这y个数里选偶数个变成负数 答案还要乘以C(y,0)+C(y,2)+C(y…

Recently Kaggle hosted a competition on the CIFAR-10 dataset. The CIFAR-10 dataset consists of 60k 32x32 colour images in 10 classes. This dataset was collected by AlexKrizhevsky, Vinod Nair, and Geoffrey Hinton. Many contestants used convolutional n…

Computational Geometry The Geometry Center (UIUC) Computational Geometry Pages (UIUC) Geometry in Action (UIC) Geometric Resource (UFL) CAGD Applets (UKA) Voronoi/Delaunay Applet (CornellUniversity) Directory of Computational Geometry Software (Dr. N…

Problem: Given two arrays, write a function to compute their intersection. 中文:已知两个数组,写一个函数来计算它们的交集 Example: Given nums1 = [1, 2, 2, 1], nums2 = [2, 2],return [2, 2]. 已知nums1 = [1, 2, 2, 1], nums2 = [2, 2], return [2, 2]. Note: Each element in the res…

---恢复内容开始--- 相关资源  Event Type  Date  Description  Course Materials Lecture 2 Thursday April 6 Image Classification The data-driven approach K-nearest neighbor Linear classification I [slides] [python/numpy tutorial][image classification notes][linear…

D. GukiZ and Binary Operations   We all know that GukiZ often plays with arrays. Now he is thinking about this problem: how many arrays a, of length n, with non-negative elements strictly less then 2l meet the following condition: ? Here operation  m…

Solved A Gym 100488A Yet Another Goat in the Garden   B Gym 100488B Impossible to Guess Solved C Gym 100488C Lost Temple Solved D Gym 100488D Toy Soldiers Solved E Gym 100488E Just Change a Word Solved F Gym 100488F Two Envelopes Solved G Gym 100488G…

D. GukiZ and Binary Operations time limit per test 1 second memory limit per test 256 megabytes input standard input output standard output We all know that GukiZ often plays with arrays. Now he is thinking about this problem: how many arrays a, of l…

Recently I am running an experiment. Because the lab has only NI devices, I have to learn to use the so-called "Graphical Programming Language" LabView. Then I found it hard to use... Then I tried to google 'LabView Stupid'... Then I got this ho…

D. GukiZ and Binary Operations time limit per test 1 second memory limit per test 256 megabytes input standard input output standard output We all know that GukiZ often plays with arrays. Now he is thinking about this problem: how many arrays a, of l…

Intervals Time Limit: 1000MS   Memory Limit: 10000K Total Submissions: 4292   Accepted: 1288 Description In the ceiling in the basement of a newly open developers building a light source has been installed. Unfortunately, the material used to cover t…

Direct Monocular Odometry Using Points and Lines Abstract 大多数VO都用点: 特征匹配 / 基于像素intensity的直接法关联. 我们做了一种直接法算法结合了点和edge. 它在纹理少的场景下工作的更好,而且对于光线的变化和快速的运动的情况下通过扩大收敛域(convergence basin - 盆)的方式提升鲁棒性. 我们对于关键帧保持了depth map. Tracking: 相机位姿是通过最小化广度误差和几何误差(匹配的edge…

转载自:http://www.cnblogs.com/fortran/articles/1996927.html boundaryFoam Steady-state solver for 1D turbulent flow,typically to generate boundary layer conditions at an inlet, for use in a simulation Example Problems: boundaryLaunderSharma model which h…

Matlab流体后处理中的奇淫巧术总结 主要参考\demos\volvec.m示例 1.等值面绘制 %% Isosurface of MRI Data cla load mri D = squeeze(D); [x, y, z, D] = subvolume(D, [nan nan nan nan nan 4]); p = patch(isosurface(x,y,z,D, 5), 'FaceColor', 'red', 'EdgeColor', 'none'); patch(isocaps(x…

Problem J. Triatrip Time Limit: 20 Sec Memory Limit: 256 MB 题目连接 http://codeforces.com/gym/100342/attachments Description The travel agency “Four Russians” is offering the new service for their clients. Unlike other agencies that only suggest one-way…

Problem C. Painting CottagesTime Limit: 2 Sec Memory Limit: 256 MB 题目连接 http://codeforces.com/gym/100342/attachments Description The new cottage settlement is organized near the capital of Flatland. The construction company that is building the settl…

Problem H. Hiking in the Hills 题目连接: http://codeforces.com/gym/100531/attachments Description Helen is hiking with her friends in a highland. Their plan is to hike from their camp A to a beautiful showplace B. Unfortunately, Helen started feeling diz…

Another Rock-Paper-Scissors Problem 题目连接: http://codeforces.com/gym/100015/attachments Description Sonny uses a very peculiar pattern when it comes to playing rock-paper-scissors. He likes to vary his moves so that his opponent can't beat him with hi…

Problem C. Painting CottagesTime Limit: 20 Sec Memory Limit: 256 MB 题目连接 http://codeforces.com/gym/100342/attachments Description The new cottage settlement is organized near the capital of Flatland. The construction company that is building the sett…

Problem F. Door LockTime Limit: 20 Sec Memory Limit: 256 MB 题目连接 http://codeforces.com/gym/100500/attachments Description It was a beautiful night at Yekaterinburg, the sky was crystal clear with no clouds, and the view of the moon and the stars was…