Problem Description DZY loves playing balls. He has n balls in a big box. On each ball there is an integer written. One day he decides to pick two balls from the box. First he randomly picks a ball from the box, and names it A. Next, without putting …

DZY Loves Balls Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 65536/65536 K (Java/Others) Total Submission(s): 807    Accepted Submission(s): 439 Problem Description There are n black balls and m white balls in the big box. Now, DZY starts…

DZY Loves Balls  Accepts: 659  Submissions: 1393  Time Limit: 4000/2000 MS (Java/Others)  Memory Limit: 262144/262144 K (Java/Others) 问题描述 DZY喜欢玩球. 他有nn个球,装进一个大盒子里.每个球上面都写着一个整数. 有一天他打算从盒子中挑两个球出来.他先均匀随机地从盒子中挑出一个球,记为AA.他不把AA放回盒子,然后再从盒子中均匀随机地挑出一个球,记为BB.…

DZY Loves Balls 题目连接: http://acm.hdu.edu.cn/showproblem.php?pid=5645 Description DZY loves playing balls. He has n balls in a big box. On each ball there is an integer written. One day he decides to pick two balls from the box. First he randomly pick…

//yy:那天考完概率论,上网无聊搜个期望可加性就搜到这题,看到以后特别有亲和感,挺有意思的. hdu5194 DZY Loves Balls [概率论 or 搜索] 题意: 一个盒子里有n个黑球和m个白球[n,m≤12].每次随机从盒子里取走一个球,取了n+m次后,刚好取完.现在用一种方法生成了一个随机的01串S[1…(n+m)],如果第i次取出的球是黑色的,那么S[i]=1,如果是白色的,那么S[i]=0.求'01'在S串中出现的期望次数. 题解: 求出在第i个位置上出现0,第i+1个位置上…

DZY Loves Balls  Accepts: 659  Submissions: 1393  Time Limit: 4000/2000 MS (Java/Others)  Memory Limit: 262144/262144 K (Java/Others) 问题描述 DZY喜欢玩球. 他有nn个球,装进一个大盒子里.每个球上面都写着一个整数. 有一天他打算从盒子中挑两个球出来.他先均匀随机地从盒子中挑出一个球,记为AA.他不把AA放回盒子,然后再从盒子中均匀随机地挑出一个球,记为BB.…

题目链接:http://acm.hdu.edu.cn/showproblem.php?pid=5194 题意:给你n个黑球,m个白球,每次从中随机抽取一个,如果抽到黑球记为1如果抽出来白球记为0,让你输出所有的可能性总数q和将这些组合中01出现的次数q,将q和p以q/p的形式输出最简形式 竟然就这样过了,只是看到了这个规律试试而已 #include<stdio.h> #include<string.h> #include<algorithm> #define MAX 1…

DZY Loves Balls Time Limit: 4000/2000 MS (Java/Others)    Memory Limit: 262144/262144 K (Java/Others)Total Submission(s): 320    Accepted Submission(s): 194 Problem Description DZY loves playing balls. He has n balls in a big box. On each ball there…

DZY Loves Balls Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 65536/65536 K (Java/Others)Total Submission(s): 860    Accepted Submission(s): 467 Problem Description There are n black balls and m white balls in the big box. Now, DZY starts t…

微软新任CEO纳德拉提出的“Microsoft Loves Linux”,并且微软宣布.NET框架的开源,近期Microsoft不但宣布了Linux平台的SQL Server,还宣布了Microsoft将重新建立对开源软件的支持,包括对Xamarin的收购,以及加入Eclipse基金会. SQL Server将会在 Linux上提供核心关系型数据库功能,旨在让SQL Server成为横跨Windows服务器和Linux的数据平台.目前有很多使用Linux但希望使用MS SQL Server的企业…

传送门 NanoApe Loves Sequence Ⅱ Time Limit: 4000/2000 MS (Java/Others)    Memory Limit: 262144/131072 K (Java/Others)Total Submission(s): 1585    Accepted Submission(s): 688 Description NanoApe, the Retired Dog, has returned back to prepare for for the…

传送门 NanoApe Loves Sequence Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 262144/131072 K (Java/Others) Total Submission(s): 1323    Accepted Submission(s): 521 Description NanoApe, the Retired Dog, has returned back to prepare for the Natio…

C. DZY Loves Colors time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output DZY loves colors, and he enjoys painting. On a colorful day, DZY gets a colorful ribbon, which consists of n units (they…

题目 Source http://codeforces.com/problemset/problem/444/C Description DZY loves colors, and he enjoys painting. On a colorful day, DZY gets a colorful ribbon, which consists of n units (they are numbered from 1 to n from left to right). The color of t…

A. DZY Loves Chessboard time limit per test 1 second memory limit per test 256 megabytes input standard input output standard output DZY loves chessboard, and he enjoys playing with it. He has a chessboard of n rows and m columns. Some cells of the c…

C. Kyoya and Colored Balls Time Limit: 2000ms Memory Limit: 262144KB 64-bit integer IO format: %I64d      Java class name: (Any) Submit Status Kyoya Ootori has a bag with n colored balls that are colored with k different colors. The colors are labele…

A.Kblack loves flag [题目链接]A.Kblack loves flag [题目类型]水题 &题意: kblack喜欢旗帜(flag),他的口袋里有无穷无尽的旗帜. 某天,kblack得到了一个n*m的方格棋盘,他决定把kk面旗帜插到棋盘上. 每面旗帜的位置都由一个整数对(x,y)来描述,表示该旗帜被插在了第x行第y列. 插完旗帜后,kblack突然对那些没有插过旗帜的行和列很不满,于是他想知道,有多少行.列上所有格子都没有被插过旗帜. kblack还要把妹,于是就把这个问题丢…

今天讨论的是称球问题. No.3 13 balls problem You are given 13 balls. The odd ball may be either heavier or lighter. Find out the odd ball in 3 weightings. 分析与解答: 看到这道题,就想起来高中时候数学老师的一句话:“真正难的题不是那些很长的题,而是那些就几句话的题!!!”现在想想真是良训啊.又想到很多老师的话,感觉到失去方显弥足珍贵的名言,不禁唏嘘啊…… 有人认为…

CA Loves GCD  Accepts: 135  Submissions: 586  Time Limit: 6000/3000 MS (Java/Others)  Memory Limit: 262144/262144 K (Java/Others) 问题描述 CA喜欢是一个热爱党和人民的优秀同♂志,所以他也非常喜欢GCD(请在输入法中输入GCD得到CA喜欢GCD的原因). 现在他有N个不同的数,每次他会从中选出若干个(至少一个数),求出所有数的GCD然后放回去. 为了使自己不会无聊,C…

Dylans loves tree view code#pragma comment(linker, "/STACK:1024000000,1024000000") #include <iostream> #include <algorithm> #include <cstdio> #include <cstring> #include <vector> #include <queue> #include <…

NanoApe Loves Sequence Ⅱ  Accepts: 374  Submissions: 946  Time Limit: 4000/2000 MS (Java/Others)  Memory Limit: 262144/131072 K (Java/Others) 问题描述 退役狗 NanoApe 滚回去学文化课啦! 在数学课上,NanoApe 心痒痒又玩起了数列.他在纸上随便写了一个长度为 nn 的数列,他又根据心情写下了一个数 mm. 他想知道这个数列中有多少个区间里的第…

3309: DZY Loves Math Time Limit: 20 Sec  Memory Limit: 512 MBSubmit: 761  Solved: 401[Submit][Status][Discuss] Description 对于正整数n,定义f(n)为n所含质因子的最大幂指数.例如f(1960)=f(2^3 * 5^1 * 7^2)=3, f(10007)=1, f(1)=0.给定正整数a,b,求sigma(sigma(f(gcd(i,j)))) (i=1..a, j=1.…

#include <iostream> #include <cstdio> #include <cstring> #include <cmath> #include <algorithm> using namespace std; #define PI pair<int,int> #define fi first #define se second #define mp(a,b) make_pair(a,b) #define maxn…

题目链接: 传送门 DZY Loves Chemistry time limit per test1 second     memory limit per test256 megabytes Description DZY loves Physics, and he enjoys calculating density. Almost everything has density, even a graph. We define the density of a non-directed gr…

题目链接: 传送门 DZY Loves Chemistry time limit per test:1 second     memory limit per test:256 megabytes Description DZY loves chemistry, and he enjoys mixing chemicals. DZY has n chemicals, and m pairs of them will react. He wants to pour these chemicals…

C16H:Magical Balls 总时间限制:  1000ms 内存限制:  262144kB 描述 Wenwen has a magical ball. When put on an infinite plane, it will keep duplicating itself forever. Initially, Wenwen puts the ball on the location (x0, y0) of the plane. Then the ball starts to dup…

Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 65536/65536 K (Java/Others)Total Submission(s): 538    Accepted Submission(s): 259 Problem Description Memphis loves xor very musch.Now he gets an array A.The length of A is n.Now he wants to kn…

http://acm.hdu.edu.cn/showproblem.php?pid=4710 Balls Rearrangement Time Limit: 6000/3000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others) Total Submission(s): 735    Accepted Submission(s): 305 Problem Description Bob has N balls and A b…

Dragon Balls Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 2909    Accepted Submission(s): 1125 Problem Description Five hundred years later, the number of dragon balls will increase unexpecte…

Labeling Balls Time Limit: 1000MS Memory Limit: 65536K Total Submissions: 9641 Accepted: 2636 Description Windy has N balls of distinct weights from 1 unit to N units. Now he tries to label them with 1 to N in such a way that: No two balls share the…