ACM_线性基

[高斯消元与线性基]

进行高斯消元，用拟阵证明取线性基的正确性Code#includeusingnamespacestd;#defineN50010#
__Horizon__·2016-03-22 14:12

2460: [BeiJing2011]元素|线性基|高斯消元|贪心

贪心从大到小加入，正确性不是很会证（根本不会证），需要用到拟阵来证明总之做法就是从大到小贪心加入，如果不与已选的元素冲突，那么就贪心选他#include #include #include #include #include #include #include #include #include #include #include #definelllonglong #defineN1005 us
ws_yzy·2016-03-19 15:00

南阳理工ACM_题目23

描述一天，TT在寝室闲着无聊，和同寝的人玩起了取石子游戏，而由于条件有限，他/她们是用旺仔小馒头当作石子。游戏的规则是这样的。设有一堆石子，数量为N（102.usingnamespacestd;03.intmain()04.{05.intk;06.longm,n;07.cin>>k;08.while(k--)09.{10.cin>>n>>m;11.if(n%(m+1)==0)12.cout<<"L
不闹的疯子·2016-03-17 17:40

BZOJ3759: Hungergame

分析之后发现只要有一组箱子的异或和为0那么就可以赢然后就是用高斯消元求线性基#include #include #include usingnamespacestd; inta[21]; charc;
liutian429073576·2016-03-01 21:00

BZOJ2844 albus就是要第一个出场

首先讲一个线性基的东西，大概就是这样： 然后就是一个什么性质：S异或起来会出现重复，但是重复了多少次呢？若我构造一个大小为k的线性基，那么重复了2^(n-k)次。
诚叙·2016-03-01 15:00

ACM_模板_求质因子

求一个数的质因子用到的方法就是有策略的暴力，没求出一个质因子，就让原数消除这一个因数。//求一个数的质因子 #include intmain() { __int64a[100],num,i,n; while(scanf("%I64d",&n)!=EOF) { num=0; for(i=2;i*i1) a[num++]=n; for(i=0;i
RaAlGhul·2016-02-26 21:00

ACM_模板_进制转换

有关于进制转换的问题，关键就是用C语言去模拟短除法的过程。#include//进制转换 intmain() { intN,R,k,a[20],i; while(scanf("%d%d",&N,&R)!=EOF) { k=0; if(N=10) printf("%c",'A'+a[i-1]-10); else printf("%d",a[i-1]); i--; } printf("\n"); } r
RaAlGhul·2016-02-26 20:00

ACM_模板_最小公倍数

gcd函数的书写方式有很多种，很多人都是用循环的，而小编的模板用则是用函数的递归，从代码上很简介，且非常易于理解。#include//最小公倍数 intgcd(inta,intb) { if(a
RaAlGhul·2016-02-26 20:00

ACM_模板_网络流

第一次接触网络流，感觉像是一堆的算法扑面而来，三天就要过去了，才刚刚对几个算法有了点初步的理解，感觉上离要熟练的做出题还很遥远，这里先给出小编对几个算法的模板总结。1.Edmond-Karp算法这种算法是最好理解的，网络上也有很多的对此算法的讲解，这里小编就不给出详细的讲解。算法的关键就是不停的在残留网络中找到增广路径，并不停的修改残留网络中的值，最后知道找不到增广路径为止，得到最大流。#incl
RaAlGhul·2016-02-25 22:00

bzoj2115 Xor dfs&线性基

线性基维护一下就好了。AC代码如下：#include #include #include #definelllo
lych_cys·2016-02-16 10:00

bzoj3105 新Nim游戏 贪心&线性基

    如果我方取完以后剩下来的棋子的集合A，其中一个子集B的抑或和为0，那么敌方显然可以取走A-B使我方处于必败状态。于是需要剩下一个集合A使得不存在任意一个子集的抑或和为0。令这样的A∈I，M为全集，那么接下证明(M,I）是一个拟阵。    首先，由反证法可知遗传性显然；关键是证明交换性（网上的证明有些是错的。附上一个正解）。假设任意A,B∈I，|A| #include #include #i
lych_cys·2016-02-14 22:00

HDU3949：XOR 高斯消元求线性基+二进制拆分

Orzhzwer#include #include #include #definelllonglong usingnamespacestd; intnow,zero; lla[10005]; intT,n,m; inlinellread() { lla=0,f=1;charc=getchar(); while(c'9'){if(c=='-')f=-1;c=getchar();} while(c>
Phenix_2015·2016-02-04 09:00

4269: 再见Xor 高斯消元求线性基

做此题之前不知道线性基是什么东西。。问了一下140142神犇懂了一些但还是有点懵懂qwq。。
Phenix_2015·2016-02-03 21:00

进入保护模式（三）——《x86汇编语言：从实模式到保护模式》读书笔记17

栈段描述符是GDT中第3个（从0开始数）描述符，这个描述符的线性基地址是0x0000_0000，段界限是0x0000_7a00，粒度是字节，B=1，属于可读
u013490896·2016-01-28 20:00

nyoj--1087--摆方格（规律）

样例输入123样例输出1619上传者ACM_刘
qq_29963431·2015-11-13 20:00

linux下X86架构IDT解析

内核在允许中断发生前，必须适当的初始化IDT.2.IDTR寄存器可以使IDT位于内存的任何地方，它制定IDT的线性基地址及其限制（最大长度）。可以通过sidt汇编语句获得IDT的基地址及限制长度。
koozxcv·2015-11-09 19:00

ACM_高次同余方程

/*poj3243 *解决高次同余方程的应用，已知X^Y=KmodZ,及X,Z,K的值，求Y的值 */ #include #include #include usingnamespacestd; #definelint__int64 #defineMAXN131071 structHashNode{lintdata,id,next;}; HashNodehash[MAXN=1) { if(b&1
xiaotan1314·2015-11-07 10:00

ACM_扩展欧几里德算法

/* 扩展欧几里德算法 基本算法：对于不完全为0的非负整数a，b，gcd（a，b）表示a，b的最大公约数，必然存在整数对x，y，使得gcd（a，b）=ax+by。 证明：设a>b。 1，显然当b=0，gcd（a，b）=a。此时x=1，y=0； 2，ab!=0时 设ax1+by1=gcd(a,b); bx2+(amodb)y2=gcd(b,amodb); 根据朴素的欧几里德原理有gcd
xiaotan1314·2015-11-06 14:00

[ACM_模拟] UVA 12504 Updating a Dictionary [字符串处理 字典增加、减少、改变问题]

      Updating a Dictionary  In this problem, a dictionary is collection of key-value pairs, where keys are lower-case letters, and values are non-negative integers. Given
·2015-11-01 10:30

[ACM_水题] UVA 12502 Three Families [2人干3人的活后分钱，水]

      Three Families  Three families share a garden. They usually clean the garden together at the end of each week, but last week, family C was on holiday, so family A sp
·2015-11-01 10:29

[ACM_模拟] UVA 12503 Robot Instructions [指令控制坐标轴上机器人移动 水]

      Robot Instructions  You have a robot standing on the origin of x axis. The robot will be given some instructions. Your task is to predict its position after executin
·2015-11-01 10:29

PRML读书会第三章 Linear Models for Regression(线性基函数模型、正则化方法、贝叶斯线性回归等)

主讲人 planktonli planktonli(1027753147) 18:58:12  大家好，我负责给大家讲讲 PRML的第3讲 linear regression的内容，请大家多多指教，群主让我们每个主讲人介绍下自己，赫赫,我也说两句，我是 applied mathematics + comp
·2015-10-31 11:51

[ACM_数据结构] POJ2352 [树状数组稍微变形]

  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 tha
·2015-10-31 11:37

[ACM_图论] ZOJ 3708 [Density of Power Network 线路密度，a->b=b->a去重]

    The vast power system is the most complicated man-made system and the greatest engineering innovation in the 20th century. The following diagram shows a typical 14 bus power system. In
·2015-10-31 11:36

[ACM_水题] ZOJ 3712 [Hard to Play 300 100 50 最大最小]

  MightyHorse is playing a music game called osu!.   After playing for several months, MightyHorse discovered the way of calculating score in osu!: 1. While p
·2015-10-31 11:36

[ACM_暴力][ACM_几何] ZOJ 1426 Counting Rectangles (水平竖直线段组成的矩形个数，暴力）

Description We are given a figure consisting of only horizontal and vertical line segments. Our goal is to count the number of all different rectangles formed by these segments. As an example, the n
·2015-10-31 11:36

[ACM_动态规划] UVA 12511 Virus [最长公共递增子序列 LCIS 动态规划]

      Virus  We have a log file, which is a sequence of recorded events. Naturally, the timestamps are strictly increasing. However, it is infected by a virus, so random
·2015-10-31 11:36

[ACM_动态规划] hdu 1176 免费馅饼 [变形数塔问题]

    Problem Description 都说天上不会掉馅饼，但有一天gameboy正走在回家的小径上，忽然天上掉下大把大把的馅饼。说来gameboy的人品实在是太好了，这馅饼别处都不掉，就掉落在他身旁的10米范围内。馅饼如果掉在了地上当然就不能吃了，所以gameboy马上卸下身上的背包去接。但由于小径两侧都不能站人，所以他只能在小径上接。由于gameboy平时老
·2015-10-31 11:36

[ACM_模拟] ACM - Draw Something Cheat [n个长12的大写字母串，找出交集，按字母序输出]

  Description Have you played Draw Something? It's currently one of the hottest social drawing games on Apple iOS and Android Devices! In this game, you and your friend play in turn. You
·2015-10-31 11:36

[ACM_数学] LA 3708 Graveyard [墓地雕塑 圈上新加点 找规律]

  Description   Programming contests became so popular in the year 2397 that the governor of New Earck -- the largest human-inhabited planet of the galaxy -- opened a special Alley of
·2015-10-31 11:36

[ACM_水题] UVA 11292 Dragon of Loowater [勇士斗恶龙 双数组排序 贪心]

    Once upon a time, in the Kingdom of Loowater, a minor nuisance turned into a major problem. The shores of Rellau Creek in central Loowater had always been a prime breeding ground for g
·2015-10-31 11:36

[ACM_模拟][ACM_数学] LA 2995 Image Is Everything [由6个视图计算立方体最大体积]

  Description   Your new company is building a robot that can hold small lightweight objects. The robot will have the intelligence to determine if an object is light enough to hold. It
·2015-10-31 11:36

[ACM_图论] The Perfect Stall 完美的牛栏（匈牙利算法、最大二分匹配）

描述 农夫约翰上个星期刚刚建好了他的新牛棚，他使用了最新的挤奶技术。不幸的是，由于工程问题，每个牛栏都不一样。第一个星期，农夫约翰随便地让奶牛们进入牛栏，但是问题很快地显露出来：每头奶牛都只愿意在她们喜欢的那些牛栏中产奶。上个星期，农夫约翰刚刚收集到了奶牛们的爱好的信息（每头奶牛喜欢在哪些牛栏产奶）。一个牛栏只能容纳一头奶牛，当然，一头奶牛只能在一个牛栏中产奶。 给出奶牛们的爱好的信息，计算最
·2015-10-31 11:35

[ACM_搜索] ZOJ 1103 || POJ 2415 Hike on a Graph (带条件移动3盘子到同一位置的最少步数 广搜）

Description "Hike on a Graph" is a game that is played on a board on which an undirected graph is drawn. The graph is complete and has all loops, i.e. for any two locations there is exactly
·2015-10-31 11:35

[ACM_图论] Fire Net （ZOJ 1002 带障碍棋盘布炮，互不攻击最大数量）

Suppose that we have a square city with straight streets.  A map of a city is a square board with n rows and n columns, each representing a street or a piece of wall. A blockhouse is a small cas
·2015-10-31 11:35

[ACM_图论] Sorting Slides(挑选幻灯片，二分匹配，中等）

Description Professor Clumsey is going to give an important talk this afternoon. Unfortunately, he is not a very tidy person and has put all his transparencies on one big heap. Before giving the talk
·2015-10-31 11:35

[ACM_搜索] Triangles(POJ1471,简单搜索，注意细节)

Description It is always very nice to have little brothers or sisters. You can tease them, lock them in the bathroom or put red hot chili in their sandwiches. But there is also a time when all meanne
·2015-10-31 11:35

[ACM_动态规划] ZOJ 1425 Crossed Matchings(交叉最大匹配 动态规划）

Description There are two rows of positive integer numbers. We can draw one line segment between any two equal numbers, with values r, if one of them is located in the first row and the other one is
·2015-10-31 11:35

[ACM_搜索] POJ 1096 Space Station Shielding （搜索 + 洪泛算法Flood_Fill）

Description Roger Wilco is in charge of the design of a low orbiting space station for the planet Mars. To simplify construction, the station is made up of a series of Airtight Cubical Modules (ACM's
·2015-10-31 11:35

[ACM_几何] Transmitters (zoj 1041 ,可旋转半圆内的最多点)

Description In a wireless network with multiple transmitters sending on the same frequencies, it is often a requirement that signals don't overlap, or at least that they don't conflict. One way of a
·2015-10-31 11:35

[ACM_模拟] The Willy Memorial Program （poj 1073 ,联通水管注水模拟）

Description Willy the spider used to live in the chemistry laboratory of Dr. Petro. He used to wander about the lab pipes and sometimes inside empty ones. One night while he was in a pipe, he fell as
·2015-10-31 11:35

[ACM_其他] Square Ice (poj1099 规律）

Description Square Ice is a two-dimensional arrangement of water molecules H2O, with oxygen at the vertices of a square lattice and one hydrogen atom between each pair of adjacent oxygen atoms. The
·2015-10-31 11:35

[ACM_图论] Highways （变形说法的最小生成树）

 http://acm.hust.edu.cn/vjudge/contest/view.action?cid=28972#problem/C  题目给出T种情况，每种情况有n个城镇，接下来每一行是第i个城镇到所有城镇的距离（其实就是个可达矩阵）。  求建设一条公路联通所有城镇并且要求最长的一段最小（其实就是最小生成树）！代码如下： #include<
·2015-10-31 11:34

[ACM_数学] Counting Solutions to an Integral Equation （x+2y+2z=n 组合种类）

http://acm.hust.edu.cn/vjudge/contest/view.action?cid=27938#problem/E 题目大意：Given, n, count the number of solutions to the equation x+2y+2z=n, where x,y,z,n are non negative inte
·2015-10-31 11:34

[ACM_几何] The Deadly Olympic Returns!!! （空间相对运动之最短距离）

http://acm.hust.edu.cn/vjudge/contest/view.action?cid=28235#problem/B 题目大意： 有两个同时再空间中匀速运动的导弹，告诉一个时间以及各自的初始坐标和该时间时的坐标，求运动过程中的最短距离 解题思路：  求出相对初位置、相对速度，则答案就是原点到射线型轨迹的距离，注意是射线！！！  
·2015-10-31 11:34

[ACM_几何] F. 3D Triangles （三维三角行相交）

http://acm.hust.edu.cn/vjudge/contest/view.action?cid=28235#problem/A 题目大意：给出三维空间两个三角形三个顶点，判断二者是否有公共点，三角形顶点、边、内部算三角形的一部分。 解题思路：见模板   //**********************************************
·2015-10-31 11:34

[ACM_动态规划] 轮廓线动态规划——铺放骨牌(状态压缩1)

Description Squares and rectangles fascinated the famous Dutch painter Piet Mondriaan. One night, after producing the drawings in his 'toilet series' (where he had to use his toilet paper to draw on
·2015-10-31 11:34

[ACM_图论] 棋盘问题 （棋盘上放棋子的方案数）

不能同行同列，给定形状和大小的棋盘，求摆放k个棋子的可行方案 Input 2表示是2X2的棋盘，1表示k，#表示可放，点不可放（-1 -1 结束） Output 输出摆放的方案数目C Sample Input 2 1 #. .# 4 4 ...# ..#. .#.. #... -1 -1 Sample Output 2 1
·2015-10-31 11:34

[ACM_其他] 总和不小于S的连续子序列的长度的最小值——尺缩法

Description: 给定长度为n的整数数列，A[0],A[1],A[2]….A[n-1]以及整数S，求出总和不小于S的连续子序列的长度的最小值。如果解不存在，则输出0。   Input: 输入数据有多组，每组数据第一行输入n,S, （10<n<10^5,S<10^8）第二行输入A[0],A[1],A[2]….A[n-1] ( 0<A[i]≤10000)
·2015-10-31 11:34

[ACM_几何] Metal Cutting(POJ1514)半平面割与全排暴力切割方案

Description In order to build a ship to travel to Eindhoven, The Netherlands, various sheet metal parts have to be cut from rectangular pieces of sheet metal. Each part is a convex polygon with at mo
·2015-10-31 11:34
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