Balls Time Limit: 1000MS   Memory Limit: 65536K Total Submissions: 1110   Accepted: 721 Description The classic Two Glass Balls brain-teaser is often posed as: "Given two identical glass spheres, you would like to determine the lowest floor in a 100-…

题目大意 鹰蛋问题.$ n\(个蛋,\)m\(层楼. 存在一层楼\)E\(,使得\)E\(以及\)E\(以下的楼层鹰蛋都不会摔碎,问最坏情况下最少多少次能够知道\)E$. 非常经典的模型,初看题目根本想不到用什么方法做,一开始可能会想到二分答案.单调队列和一些线性的东西.但是明确的说:这些都是不可行的! 正确的解法其实是\(DP\) 设计状态: \(f[i][j]\)表示\(i\)个蛋,确定\(j\)层楼的\(E\)的答案. 如果当前在第\(k\)层扔蛋,两种可能: 蛋碎了,那么还剩下\(i-1…

应该是machine 和POJ3783 Balls类型相似. 现在上界为i元,猜错次数最多为j时,开始猜测为k元,有两种情况: 1 猜中:(i - k + 1) * dp[i - k][j] 2 猜不中 k * dp[k - 1][j - 1] 两种情况的均值即为第一次猜测为k时的期望,1 <= k <= i + 1,枚举k,取最小值. 另外其实m取不到2000,由二分思想最多十几次(开始也没想到,一直不能把n^3的复杂度降下来). #include<cstdio> #includ…

非常详细的题解:戳这里 例题:poj-3783 Balls Balls Time Limit: 1000MS   Memory Limit: 65536K Total Submissions: 1151   Accepted: 748 Description The classic Two Glass Balls brain-teaser is often posed as: "Given two identical glass spheres, you would like to determ…

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…

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…

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…

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…

Labeling Balls Time Limit: 1000MS Memory Limit: 65536K Total Submissions: 11893 Accepted: 3408 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…

 Balls and Boxes(盒子与球) Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 65536/65536 K (Java/Others) Description 题目描述 Mr. Chopsticks is interested in random phenomena, and he conducts an experiment to study randomness. In the experiment, he thr…

C. Balls and Boxes time limit per test 1 second memory limit per test 256 megabytes input standard input output standard output Little Vasya had n boxes with balls in the room. The boxes stood in a row and were numbered with numbers from 1 to n from…

Dragon Balls Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 3363    Accepted Submission(s): 1304 Problem Description Five hundred years later, the number of dragon balls will increase unexpecte…

Kyoya Ootori has a bag with n colored balls that are colored with k different colors. The colors are labeled from 1 to k. Balls of the same color are indistinguishable. He draws balls from the bag one by one until the bag is empty. He noticed that he…

C. Kyoya and Colored Balls Time Limit: 20 Sec Memory Limit: 256 MB 题目连接 http://codeforces.com/contest/554/problem/C Description Kyoya Ootori has a bag with n colored balls that are colored with k different colors. The colors are labeled from 1 to k.…

Balls and Boxes 题目链接: http://acm.hdu.edu.cn/showproblem.php?pid=5810 Description Mr. Chopsticks is interested in random phenomena, and he conducts an experiment to study randomness. In the experiment, he throws n balls into m boxes in such a manner t…

A. Bear and Three Balls time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output Limak is a little polar bear. He has n balls, the i-th ball has size ti. Limak wants to give one ball to each of his…

balls Time Limit: 20 Sec Memory Limit: 256 MB 题目连接 http://acm.hdu.edu.cn/showproblem.php?pid=5570 Description There are n balls with m colors. The possibility of that the color of the i-th ball is color j is ai,jai,1+ai,2+...+ai,m. If the number of b…

Dragon Balls Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others) Total Submission(s): 5340    Accepted Submission(s): 2014 Problem Description Five hundred years later, the number of dragon balls will increase unexpect…

Labeling Balls DescriptionWindy 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 same label.The labeling satisfies several constrains like "The ball labeled with…

作者:jostree 转载请注明出处 http://www.cnblogs.com/jostree/p/4098409.html 题目链接:poj 3783 Balls 动态规划 100层楼投鸡蛋问题 使用动态规划算法,使用$dp[i][j]$表示对于i层楼并拥有$j$个鸡蛋时能够判断鸡蛋质量需要的最少次数.假如我们在第$k$层扔下一个鸡蛋,则有两种情况,如果鸡蛋没有损坏则问题相当于我们对于$i-k$层楼拥有$j$个鸡蛋所需的最少的次数.如果鸡蛋损坏了,则问题相当于对于k层楼拥有$j-1$个鸡蛋…

Labeling Balls Time Limit: 1000MS   Memory Limit: 65536K Total Submissions: 12246   Accepted: 3508 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…

Dragon Balls Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 4384    Accepted Submission(s): 1673 Problem Description Five hundred years later, the number of dragon balls will increase unexpecte…

题意: 有k种颜色,每种颜色对应a[i]个球,球的总数不超过1000 要求第i种颜色的最后一个球,其后面接着的必须是第i+1种颜色的球 问一共有多少种排法 Sample test(s) input output input output Note In the first sample, we have 2 balls of color 1, 2 balls of color 2, and 1 ball of color 3. The three ways for Kyoya are: 思路:…

Problem Description Five hundred years later, the number of dragon balls will increase unexpectedly, so it's too difficult for Monkey King(WuKong) to gather all of the dragon balls together. His country has N cities and there are exactly N dragon bal…

Kyoya and Colored Balls time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output Kyoya Ootori has a bag with n colored balls that are colored with k different colors. The colors are labeled from 1 …

Problem Description There are n balls with m colors. The possibility of that the color of the i-th ball +ai,+...+ai,m. If the number of balls with the j-th is x, then you should pay x2 as the cost. Please calculate the expectation of the cost. Input…

Problem Description Bob has N balls and A boxes. He numbers the balls from 0 to N-1, and numbers the boxes from 0 to A-1. To find the balls easily, he puts the ball numbered x into the box numbered a if x = a mod A.   Some day Bob buys B new boxes, a…

Labeling Balls Time Limit: 1000MS   Memory Limit: 65536K Total Submissions: 12466   Accepted: 3576 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…