B. The Meeting Place Cannot Be Changed The main road in Bytecity is a straight line from south to north. Conveniently, there are coordinates measured in meters from the southernmost build…

Problem Description In the Dark forest, there is a Fairy kingdom where all the spirits will go together and Celebrate the harvest every year. But there is one thing you may not know that they hate walking so much that they would prefer to stay at hom…

题意:给定x轴上有n个点,每一个点都有一个权值,让在x轴上选一个点,求出各点到这个点的距离的三次方乘以权值最小. 析:首先一开始我根本不会三分,也并没有看出来这是一个三分的题目的,学长说这是一个三分的题,我就百度了一下什么是三分算法,一看感觉和二分差不多,当然就是和二分差不多,也是慢慢缩短范围. 这个题也这样,在最左端和最右端不断的三分,直到逼进那个点,刚开始我设置的误差eps是10负8,但是TLE了,我以为是太小,三分数太多,然后我又改成10负6还是TLE,我又失望了,干脆我不用误差了,我让它…

Party All the Time Time Limit: 6000/2000 MS (Java/Others)    Memory Limit: 65536/32768 K (Java/Others)Total Submission(s): 5462    Accepted Submission(s): 1707 Problem Description In the Dark forest, there is a Fairy kingdom where all the spirits wil…

Party All the Time Time Limit: 6000/2000 MS (Java/Others)    Memory Limit: 65536/32768 K (Java/Others)Total Submission(s): 4282    Accepted Submission(s): 1355 Problem Description In the Dark forest, there is a Fairy kingdom where all the spirits wil…

题意:n个人,都要去參加活动,每一个人都有所在位置xi和Wi,每一个人没走S km,就会产生S^3*Wi的"不舒适度",求在何位置举办活动才干使全部人的"不舒适度"之和最小,并求最小值. 思路:首先能够得出最后距离之和的表达式最多仅仅有两个极点, 更进一步仅仅有一个极点,否则无最小值. 那么我们就可用三分法或者二分法求解.即对原函数三分或对导数二分就可以. #include<cstdio> #include<cstring> #inclu…

只能说感觉是三分吧,因为两端值肯定是最大的,而中间肯定存在一点使之最小,呃,,,,猜 的... #include <iostream> #include <cstdio> #include <cstring> #include <cmath> #include <algorithm> #define LL __int64 using namespace std; const int N=50050; double point[N]; double…

Time Limit: 6000/2000 MS (Java/Others) Memory Limit: 65536/32768 K (Java/Others) Total Submission(s): 6979 Accepted Submission(s): 2181 Problem Description In the Dark forest, there is a Fairy kingdom where all the spirits will go together and Celebr…

F - 三分 Crawling in process... Crawling failed Time Limit:2000MS     Memory Limit:32768KB     64bit IO Format:%I64d & %I64u Submit Status Practice HDU 4355 Description In the Dark forest, there is a Fairy kingdom where all the spirits will go together…

http://acm.hdu.edu.cn/showproblem.php?pid=1869 六度分离 Time Limit: 5000/1000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 4355    Accepted Submission(s): 1768 Problem Description 1967年,美国著名的社会学家斯坦利·米尔格兰姆提出了一个名为“小世界现象…