题目链接:http://acm.zju.edu.cn/onlinejudge/showProblem.do?problemId=5373 题目意思: 有两个class:A 和 B,Bob 在 Class A 里面.现在给出 Class A(n-1人) 和 Class B(m人) 所有人的分数,除了Bob,所以Class A 少了一个人.现在需要找出 Bob 最大可能的分数和最少可能的分数,使得他在Class A 里面拉低平均分,而在Class B 里面提高平均分. 由于数据量不大,所以可以暴力枚…

I - Information Entropy Time Limit:2000MS     Memory Limit:65536KB     64bit IO Format:%lld & %llu Submit Status Description Information Theory is one of the most popular courses in Marjar University. In this course, there is an important chapter abo…

题目链接:http://acm.zju.edu.cn/onlinejudge/showProblem.do?problemId=5374 思路:题目的意思是求树上的两点,使得树上其余的点到其中一个点的最长距离最小.可以想到这题与树直径有关,我们可以这样做,首先求出树的直径,然后取出树的中点以及与该中点相邻,并且是直径上的一个点,这样就把这棵树划分为两颗子树,然后分别求出这两棵树的直径,最后要选择的两个点分别就是这两棵树的直径上的中点. 一开始是用dfs写的,结果爆栈了,改成bfs就过了. #in…

套公式 Sample Input 33 bit25 25 50 //百分数7 nat1 2 4 8 16 32 3710 dit10 10 10 10 10 10 10 10 10 10Sample Output 1.5000000000001.4808108324651.000000000000 # include <iostream> # include <cstdio> # include <cstring> # include <algorithm>…

题意:给出A班和B班的学生成绩,如果bob(A班的)在B班的话,两个班级的平均分都会涨.求bob成绩可能的最大,最小值. A班成绩平均值(不含BOB)>A班成绩平均值(含BOB) && B班成绩平均值(不含BOB)< B班成绩平均值(含BOB) 化简后得 B班成绩平均值(不含BOB) < X < A班成绩平均值(不含BOB) Sample Input 24 35 5 54 4 36 55 5 4 5 31 3 2 2 1Sample Output 4 42 4 #…

首先赞一下题目, 好题 题意: Marjar University has decided to upgrade the infrastructure of school intranet by using fiber-optic technology. There are N buildings in the school. Each building will be installed with one router. These routers are connected by optic…

Average Score Time Limit: 2 Seconds      Memory Limit: 131072 KB Bob is a freshman in Marjar University. He is clever and diligent. However, he is not good at math, especially in Mathematical Analysis. After a mid-term exam, Bob was anxious about his…

ZOJ 2819 Average Score Time Limit: 2 Sec  Memory Limit: 60 MB 题目连接 http://acm.zju.edu.cn/onlinejudge/showProblem.do?problemId=5373 Description Bob is a freshman in Marjar University. He is clever and diligent. However, he is not good at math, especia…

题目链接:http://acm.zju.edu.cn/onlinejudge/showProblem.do? problemId=5381 Information Theory is one of the most popular courses in Marjar University. In this course, there is an important chapter about information entropy. Entropy is the average amount o…

那天在机房做的同步赛,比现场赛要慢了一小时开始,直播那边已经可以看到榜了,所以上来就知道A和I是水题,当时机房电脑出了点问题,就慢了好几分钟,12分钟才A掉第一题... A.Average Score 题目大意:给定A序列和B序列,长度分别是n和m,告诉你A序列中的n-1个数和B序列的m个数,求剩下的那个A序列中的数满足:将这个数从A序列移除,然后添加到B序列,使得A序列的平均值变小,B序列的平均值变大.求这个数的取值范围(是整数) 解题思路:求出A序列剩下的n-1个数的平均值,和B序列的平均值…