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原创 51NOD 1467 旋转绳 二分查找 模拟

1467 旋转绳题目来源: CodeForces基准时间限制:1.5 秒 空间限制:131072 KB 分值: 80 难度:5级算法题 收藏 关注平面上有n个钉子,他们从1到n编号,第i个钉子的坐标是 (xi, 0)。然后我们我们把一个长度为L,带重物的绳子系到第i个钉子上(那么重物所在的坐标是(xi, -L))。然后用力将重

2016-03-19 15:34:40 468

原创 PID371 / [AHOI1997]彩旗飘飘 排列组合加DP

题目描述有n面红旗和n面黄旗从东到西插成一排。如果相邻的两面旗帜的颜色不同,则称为颜色发生一次改变。任务:计算这2n面旗帜的颜色改变m次的插法共有多少种?示例:旗帜的颜色为“红黄红红黄黄黄”称为颜色改变了3次的插法。在n=4,m=1时仅有两种插法:“红红红红黄黄黄黄”和“黄黄黄黄红红红红”,对应的输出为“2”。输入格式输入:从键盘

2016-02-21 14:44:56 1796

转载 51nod 1119 除法取模

1119 机器人走方格 V2基准时间限制:1 秒 空间限制:131072 KB 分值: 10 难度:2级算法题 收藏 关注M * N的方格,一个机器人从左上走到右下,只能向右或向下走。有多少种不同的走法?由于方法数量可能很大,只需要输出Mod 10^9 + 7的结果。Input第1行,2个数M,N,中间用空

2016-01-27 17:47:59 1458

原创 高斯消元模板

#include#include#include#include#includeusing namespace std;const int MAXN=50;int a[MAXN][MAXN];//增广矩阵int x[MAXN];//解集bool free_x[MAXN];//标记是否是不确定的变元/*void Debug(void

2015-12-28 23:54:22 239

原创 51NOD 1136 欧拉函数模板

#include#include#include#include#define LL long long#define maxn 10000using namespace std;const int SIZE = 100000001;int phi[SIZE];void init(){    int i, j;    memset(phi,

2015-12-26 12:09:00 302

原创 51NOD N!

#include#include#define MAX 40000using namespace std;int main(){    int n;int i,j;    int a[MAX];      //存数运算结果int p,h,temp;          //p存储当前结果的位数,h为进位memset(a,0,sizeof(a));a

2015-12-26 10:54:15 220

原创 HDU 2512 第二类Strling数

一卡通大冒险Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 1864    Accepted Submission(s): 1238Problem Description因为长期钻研算法, 无暇顾及个人问题,BUAA

2015-12-19 17:15:11 275

原创 HDU 2709 DP

SumsetsTime Limit: 6000/2000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 1977    Accepted Submission(s): 781Problem DescriptionFarmer John commanded h

2015-12-17 14:58:51 291

原创 POJ 2262 筛素法

Goldbach's ConjectureTime Limit: 1000MS Memory Limit: 65536KTotal Submissions: 41755 Accepted: 15995DescriptionIn 1742, Christian Goldbach, a German amateur mathe

2015-12-13 12:33:30 209

原创 HDU 2299 归并求逆序

Ultra-QuickSortTime Limit: 7000MS Memory Limit: 65536KTotal Submissions: 50751 Accepted: 18599DescriptionIn this problem, you have to analyze a particular sorting a

2015-12-11 17:19:11 275

原创 POJ 3233 矩阵快速幂

Matrix Power SeriesTime Limit: 3000MS Memory Limit: 131072KTotal Submissions: 18608 Accepted: 7867DescriptionGiven a n × n matrix A and a positive integer k, fi

2015-12-10 00:13:23 232

原创 POJ 1019 数学

Number SequenceTime Limit: 1000MS Memory Limit: 10000KTotal Submissions: 36482 Accepted: 10525DescriptionA single positive integer i is given. Write a program to fi

2015-12-09 17:48:44 173

原创 POJ 2586 贪心

Y2K Accounting BugTime Limit: 1000MS Memory Limit: 65536KTotal Submissions: 11966 Accepted: 6055DescriptionAccounting for Computer Machinists (ACM) has sufferred fr

2015-12-08 20:37:26 176

转载 POJ 1753 枚举

Flip GameTime Limit: 1000MS Memory Limit: 65536KTotal Submissions: 36371 Accepted: 15851DescriptionFlip game is played on a rectangular 4x4 field with two-sided p

2015-12-07 23:30:07 264

原创 HDU 5147 树状数组

Sequence IITime Limit: 5000/2500 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 949    Accepted Submission(s): 380Problem DescriptionLong long ago, there

2015-11-27 20:51:37 293

原创 HDU 1712 分组背包

ACboy needs your helpTime Limit: 1000/1000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 5524    Accepted Submission(s): 3011Problem DescriptionACboy ha

2015-11-25 17:25:50 165

原创 HDU 2586 最小公共祖先

How far away ?Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 10005    Accepted Submission(s): 3565Problem DescriptionThere are n ho

2015-11-23 19:59:23 228 1

原创 HDU 5568 DP大数

sequence2Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 65536/65536 K (Java/Others)Total Submission(s): 234    Accepted Submission(s): 97Problem DescriptionGiven an integer array

2015-11-22 11:28:13 211

原创 HDU 3183 RMQ

A Magic LampTime Limit: 2000/1000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 2563    Accepted Submission(s): 1001Problem DescriptionKiki likes travel

2015-11-20 15:53:08 232

原创 HDU 4561 模拟

连续最大积Time Limit: 3000/1000 MS (Java/Others)    Memory Limit: 65535/32768 K (Java/Others)Total Submission(s): 2012    Accepted Submission(s): 633Problem Description小明和他的好朋友小西在玩一个游戏,由电脑随机生成一

2015-11-19 20:43:50 232

原创 HDU 4548 树状数组

美素数Time Limit: 3000/1000 MS (Java/Others)    Memory Limit: 65535/32768 K (Java/Others)Total Submission(s): 4687    Accepted Submission(s): 1616Problem Description  小明对数的研究比较热爱,一谈到数,脑子里就涌现出

2015-11-15 16:35:55 155

原创 HDU 2222 AC自动机

Keywords SearchTime Limit: 2000/1000 MS (Java/Others)    Memory Limit: 131072/131072 K (Java/Others)Total Submission(s): 46407    Accepted Submission(s): 14762Problem DescriptionIn the mod

2015-11-14 14:42:29 167

原创 HDU 2576 数学

Another Sum ProblemTime Limit: 2000/1000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 1477    Accepted Submission(s): 407Problem DescriptionFunnyAC lik

2015-11-13 18:38:28 201

原创 HDU 1708 hash

Fibonacci StringTime Limit: 3000/1000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 4825    Accepted Submission(s): 1626Problem DescriptionAfter little

2015-11-13 18:11:00 230

原创 HDU 1568 对数

FibonacciTime Limit: 1000/1000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 4103    Accepted Submission(s): 1918Problem Description2007年到来了。经过2006年一年的修

2015-11-13 14:32:50 177

原创 HDU 4549 费马定理 快速幂 矩阵快速幂

M斐波那契数列Time Limit: 3000/1000 MS (Java/Others)    Memory Limit: 65535/32768 K (Java/Others)Total Submission(s): 2286    Accepted Submission(s): 668Problem DescriptionM斐波那契数列F[n]是一种整数数列,

2015-11-12 17:22:23 164

原创 HDU 1496 hash

EquationsTime Limit: 6000/3000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 6800    Accepted Submission(s): 2760Problem DescriptionConsider equations h

2015-11-11 21:08:49 176

原创 HDU 1518 DFS

SquareTime Limit: 10000/5000 MS (Java/Others)    Memory Limit: 65536/32768 K (Java/Others)Total Submission(s): 11432    Accepted Submission(s): 3671Problem DescriptionGiven a set of sticks

2015-11-11 16:09:12 188

原创 HDU 1561 树形DP

The more, The BetterTime Limit: 6000/2000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 6576    Accepted Submission(s): 3863Problem DescriptionACboy很喜欢玩

2015-11-10 22:42:07 147

原创 HDU 4722 数位DP

Good NumbersTime Limit: 2000/1000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 3620    Accepted Submission(s): 1147Problem DescriptionIf we sum up ever

2015-11-10 00:00:43 154

原创 HDU 3555 数位DP

BombTime Limit: 2000/1000 MS (Java/Others)    Memory Limit: 131072/65536 K (Java/Others)Total Submission(s): 11460    Accepted Submission(s): 4084Problem DescriptionThe counter-terrorists

2015-11-09 23:41:53 217

原创 HDU 4515 模拟

小Q系列故事——世界上最遥远的距离Time Limit: 500/200 MS (Java/Others)    Memory Limit: 65535/32768 K (Java/Others)Total Submission(s): 2102    Accepted Submission(s): 750Problem Description  世界上最遥远的距离

2015-11-08 17:15:02 269

原创 HDU 4510 模拟

小Q系列故事——为什么时光不能倒流Time Limit: 300/100 MS (Java/Others)    Memory Limit: 65535/32768 K (Java/Others)Total Submission(s): 3425    Accepted Submission(s): 1469Problem Description  我以为我会是最坚强的

2015-11-07 20:26:29 199

原创 HDU 4509 hash

湫湫系列故事——减肥记IITime Limit: 5000/2000 MS (Java/Others)    Memory Limit: 65535/32768 K (Java/Others)Total Submission(s): 2887    Accepted Submission(s): 1180Problem Description  虽然制定了减肥食谱,但是湫湫

2015-11-07 15:11:01 261

原创 HDU 4508 完全背包

湫湫系列故事——减肥记ITime Limit: 3000/1000 MS (Java/Others)    Memory Limit: 65535/32768 K (Java/Others)Total Submission(s): 3710    Accepted Submission(s): 1866Problem Description  对于吃货来说,过年最幸福的事就

2015-11-07 14:50:50 270

原创 HDU 4506 快速幂

小明系列故事——师兄帮帮忙Time Limit: 3000/1000 MS (Java/Others)    Memory Limit: 65535/32768 K (Java/Others)Total Submission(s): 5161    Accepted Submission(s): 1365Problem Description  小明自从告别了ACM/ICP

2015-11-07 14:39:19 172

原创 HDU 4501 3重01背包

小明系列故事——买年货Time Limit: 5000/2000 MS (Java/Others)    Memory Limit: 65535/32768 K (Java/Others)Total Submission(s): 2912    Accepted Submission(s): 1306Problem Description  春节将至,小明要去超市购置年货,

2015-11-07 12:49:18 253

原创 HDU 4505 模拟

小Q系列故事——电梯里的爱情Time Limit: 300/100 MS (Java/Others)    Memory Limit: 65535/32768 K (Java/Others)Total Submission(s): 3335    Accepted Submission(s): 2126Problem Description  细心的同事发现,小Q最近喜欢乘

2015-11-06 22:55:20 222

原创 HDU 4503 数学

湫湫系列故事——植树节Time Limit: 1000/500 MS (Java/Others)    Memory Limit: 65535/32768 K (Java/Others)Total Submission(s): 1233    Accepted Submission(s): 732Problem Description  今天是一年一度的植树节,腾讯幼儿园要

2015-11-06 20:21:43 307

原创 HDU 4502 DP

吉哥系列故事——临时工计划Time Limit: 3000/1000 MS (Java/Others)    Memory Limit: 65535/32768 K (Java/Others)Total Submission(s): 3479    Accepted Submission(s): 1364Problem Description  俗话说一分钱难倒英雄汉,高中

2015-11-06 20:05:00 183

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