做法一 首先将排列用康托展开映射到整数,并且预处理出排列之间乘法的结果,复杂度 \(\mathcal{O}(k(k!) ^ 2)\). 枚举左端点,有可能分段的右端点至多只有 \(k!\) 个,不妨将这些右端点首先预处理得出. 一个基础的想法是从左往右每次加入一个不在当前集合内的置换然后暴力搜索扩展,这样复杂度至多是 \(\mathcal{O}(nk(k!) ^ 2)\) 的,不能通过. 注意到每次扩展到不能扩展位置得到的所有置换构成 \(S_k\) 的一个子群,有拉格朗日定理可知每次大小都是…

1. 1229A Marcin and Training Camp 大意: 给定$n$个对$(a_i,b_i)$, 要求选出一个集合, 使得不存在一个元素好于集合中其他所有元素. 若$a_i$的二进制中某一位为$1$, $a_j$对应位为$0$, 那么$(a_i,b_i)$好于$(a_j,b_j)$. 显然出现次数不少于$2$的数都可以选, 然后再把包含关系的数全选了即可. #include <iostream> #include <sstream> #include <al…

matlab tips and tricks and ... page overview: I created this page as a vectorization helper but it grew to become my annotated Matlab reading cache. In order to motivate the DSP people out there, I am showing below how one can apply a window and scal…

题意  给你一些牌  所有正面朝下放桌子上   你选一个起点    翻开那张牌   牌上的数字是几就向前走几步   J,Q,K 都是向前走10步  A向前走11步   知道向前走相应的步数后超过了终点   输入n m 和n个数   代表你以第m张牌为起点   依次掀开了n张牌就不能再掀了    然后相同的牌   Alice以1-10张牌中的随意一个为起点   求Alice最后的终点与你的终点相同的概率 c[i]表示第i张牌的面值   没被掀开的牌的面值都是未知的c[i]=0  可能为2-A中的随…

Text Postcards always spoil my holidays. Last summer, I went to Italy. I visited museums and sat in public gardens. A friendly waiter taught me a few words of Italian. Then he lent me a book. I read a few lines, but I did not understand a word. Every…

前两次的总结:testng annotation生命周期 http://www.cnblogs.com/tobecrazy/p/4579414.html testng.xml的使用和基本配置http://www.cnblogs.com/tobecrazy/p/4582173.html 在前两次的总结中,了解了一些testng基础的用法,今天了解一下使用参数的trick和使用reportng生成漂亮的测试报告 Testng 传递参数的tricks 在 http://www.cnblogs.com/…

1.CardIO 识别 框架 GitHub 下载地址 配置 1.把框架整个拉进自己的工程,然后在 TARGETS => Build Phases => Link Binary With Libraries 里边分别加入下面这几个框架. Accelerate.framework MobileCoreServices.framework CoreMedia.framework AudioToolbox.framework AVFoundation.framework 2.在TARGETS =>…

How to Train a GAN? Tips and tricks to make GANs work 转自:https://github.com/soumith/ganhacks While research in Generative Adversarial Networks (GANs) continues to improve the fundamental stability of these models, we use a bunch of tricks to train th…

容斥原理+状压 Card Collector Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 1940    Accepted Submission(s): 907Special Judge Problem Description In your childhood, do you crazy for collecting the bea…

Install application pavucontrol Run pavucontrol You will see the configuration about sound card and mic card. If can not solve it, Kmix shoud be used and combine it with pavucontrol…

补充新闻:程序员黑餐馆系统 给自己饭卡里充钱 ,技术是双刃剑,小心,小心! 前言 从M1卡的验证漏洞被发现到现今,破解设备层出不穷,所以快速傻瓜式一键破解不是本文的重点,年轻司机将从本文中获得如下技能. 如果你想简单快速的上手,你可以选择ACR122-like,Proxmark3等容易购买到的操作简单的设备,或者有个带有NFC功能并安装有安卓Mifare Classic Tool (MCT)软件的手机也是个不错的选择. 本文基于树莓派加RC522,PN532模块试验,如果你是刚入门的Geek爱好…

LoadRunner AJAX TruClient协议Tips and Trickshttp://automationqa.com/forum.php?mod=viewthread&tid=2851&fromuid=2…

原文:C# Tips & Tricks: Weak References - When and How to Use Them Sometimes you have an object which is very large and needed multiple times, but not constantly, throughout your application. For example a huge lookup table, or the contents of a large f…

神经网络训练中的Tricks之高效BP(反向传播算法) 神经网络训练中的Tricks之高效BP(反向传播算法) zouxy09@qq.com http://blog.csdn.net/zouxy09 Tricks!这是一个让人听了充满神秘和好奇的词.对于我们这些所谓的尝试应用机器学习技术解决某些问题的人,更是如此.曾记得,我们绞尽脑汁,搓手顿足,大喊“为什么我跑的模型不work?”,“为什么我实现的效果那么差?”,“为什么我复现的结果没有他论文里面说的那么好?”.有人会和你说“你不懂调参!里面有…

Card Time Limit: 10000/5000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 218    Accepted Submission(s): 86Special Judge Problem Description There are x cards on the desk, they are numbered from 1 to x. The score o…

[OpenJudge 3061]Flip The Card 试题描述 There are N× Ncards, which form an N× Nmatrix. The cards can be placed upwards or downwards. Now Acer is going to do some operations so that all the cards are placed upwards after the operations. In each operation,…

How and Where to Use the ORCA Card The Microsoft ORCA card provides unlimited rides on all buses, trains, and water taxis operated by participating transit agencies. The ORCA card uses contact-free technology similar to a building access card, so you…

Boot your Orange PI board from EMMC without SD Card inserted login insert your SD Card Run: sudo install_to_sdcard [btrfs] Copy the Code Your emmc Linux installation will be transfered to SD Card You can boot from that SD Card on another or the same…

Download any of the available images (xz archive) from Mega or GoogleDrive Download scriptbin_kernel.tar.gz, it contains the latest kernel (uImage) and script.bin Unpack the archive. Write the xxx.img file (disk image) to your SD Card on Linux use dd…

http://acm.split.hdu.edu.cn/showproblem.php?pid=4336 Card Collector Special Judge Problem Description   In your childhood, do you crazy for collecting the beautiful cards in the snacks? They said that, for example, if you collect all the 108 people i…

Card Game Cheater Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 65536/32768 K (Java/Others)Total Submission(s): 1272    Accepted Submission(s): 675 Problem Description Adam and Eve play a card game using a regular deck of 52 cards. The rule…

Card Collector Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 3001    Accepted Submission(s): 1435Special Judge Problem Description In your childhood, do you crazy for collecting the beautiful…

insert Vodafone sim card,open the mms read report,when receive the read report,cann't download the message Test steps: 1.insert Vodafone sim card 2.open the mms read report 3.send the mms successfully 4.when receive the read report 这里的环境需要描述一下:在国内不会出…

There are fifty-two cards in a deck, each of which belongs to one of four suits and one of thirteen ranks. The suits are Spades, Hearts, Diamonds, and Clubs (in descending order in bridge). The ranks are Ace, 2, 3, 4, 5, 6, 7, 8, 9, 10, Jack, Queen,…

<!DOCTYPE html> <html> <head> <title>ExtJs</title> <meta http-equiv="Content-Type" content="text/html; charset=utf-8"/> <link rel="stylesheet" type="text/css" href="ExtJs/…

/**************************************************************************** * I.MX6 uSDHC SD card register * 声明: * 本文主要是记录SD card注册的相关流程及遇到的一些问题. * * 2015-12-20 深圳 南山平山村 曾剑锋 **************************************************************************…

https://www.hex-rays.com/products/decompiler/manual/tricks.shtml First of all, read the troubleshooting page. It explains how to deal with most decompilation problems. Below is a mix of other useful information that did not fit into any other page: V…

最近用Swift写了个小工具Scrum Planning Card,如果你也用scrum管理项目, 或许用这个工具可以提高你的工作效率. 另外欢迎提建议和反馈,谢谢. 欢迎关注我的微信公众号 Hope this helps, Michael…

饭卡(card) Time Limit: 20 Sec  Memory Limit: 256 MB 题目连接 http://acm.uestc.edu.cn/#/problem/show/31 Description 电子科大本部食堂的饭卡有一种很诡异的设计,即在购买之前判断余额.如果购买一个商品之前,卡上的剩余金额大于或等于5元,就一定可以购买成功(即使购买后卡上余额为负),否则无法购买(即使金额足够).所以大家都希望尽量使卡上的余额最少. 某天,食堂中有n种菜出售,每种菜可购买一次.已知每种…

YJC tricks time Time Limit: 20 Sec Memory Limit: 256 MB 题目连接 http://acm.hdu.edu.cn/showproblem.php?pid=5276 Description YJC收到了一份神秘礼物.是一个长成这样的钟. YJC不是时间领主所以他并不能乱搞时间,但是这个钟实在是太难认了!所以他想来耍耍你. 现在YJC给你时针和分针间的夹角,让你告诉他现在是什么时候. 你将以以下格式给出可能的时间:HH:MM:SS分别表示小时,分钟…