第一发又超时了... 题目大意:给你n个点,然后给你n-1的数,表示两两距离,然后让你输出n个答案,第i个答案表示从这n个点里面挑i个点,然后这i个点两两之间会有一个距离,答案要求这些距离和的最大值. 第一次思路:n个点,给你距离,我们可以得到在坐标轴上表示n个点的坐标,然后我们可以先设每个点坐标为xi 可以发现:当n>=2的时候 n=2,i=2 距离为x2-x1 n=3,i=2距离为x3-x1 i=3距离为 x2-x1+x3-x1+x3-x2=2*x3-2*x1 n=5,i=2距离为x5-x1…

题目: http://cojs.tk/cogs/problem/problem.php?pid=1070 1070. [焦作一中2012] 玻璃球游戏 ★   输入文件:marbles.in   输出文件:marbles.out   简单对比时间限制:1 s   内存限制:128 MB [问题描述] 小x的业余生活中,有一项是玩滚玻璃球游戏. 某天,小x想到了一种很无趣的玩法,当然,这种玩法就是为了玩看题的你们. 小x首先建立了一个单向轨道,这个单向轨道可以抽象成一个有向图,每个顶点的出度都是1…

11月23日 大清早,跟着wyb的脚步,早起跑过去听方伟的编译原理,然鹅一点都没听进去,在焦作胡辣汤群里疯狂灌水... 听说焦作那边冷得不行,前一天看天气预报说那边已经是2℃了,都快零下了,然鹅学校里正好都没有厚的衣服.看队友一个披着黑色大衣,另一个全身裹得严严实实,而我只有秋装三件套,外套毛衣T恤衫,我慌得不行,生怕冻死在焦作.... 上动车,迷迷糊糊地晃到了焦作...感觉整辆车上的人都一起下了车?走到南广场却发现,一辆出租车都没有...G1810号高铁给焦作带来了几百只JBer,然后把他们留…

There are N children in kindergarten. Miss Li bought them NNN candies. To make the process more interesting, Miss Li comes up with the rule: All the children line up according to their student number (1...N), and each time a child is invited, Miss Li…

God Water likes to eat meat, fish and chocolate very much, but unfortunately, the doctor tells him that some sequence of eating will make them poisonous. Every hour, God Water will eat one kind of food among meat, fish and chocolate. If there are 3 c…

Day 0 没有直达焦作的飞机,所以选择了先到新郑机场,再转乘城际列车.城际列车猜是专门给学生开通的吧,每天只有来和回一共两趟(所以机票选择的余地也不多).买的时候只有无座票了,本来以为会一直站着,但上车才发现是只在卖无座票,而新郑机场是首发站,所以随便坐就行了,不用担心要给后上车的人让座位的,买了无座票还全程坐着的感觉真爽_(:з」∠)_ Day 1 领衣服(羽绒马甲!纯蓝色没有任何广告!),领餐券(5*3+2*2+1=20元/顿),去了食堂一看,主食居然都是6元8元一份?!尤其是面食,价格低…

There are NN different kinds of transport ships on the port. The i^{th}ith kind of ship can carry the weight of V[i]V[i] and the number of the i^{th}ith kind of ship is 2^{C[i]} - 12C[i]−1. How many different schemes there are if you want to use thes…

A prince of the Science Continent was imprisoned in a castle because of his contempt for mathematics when he was young, and was entangled in some mathematical curses. He studied hard until he reached adulthood and decided to use his knowledge to esca…

You ye Jiu yuan is the daughter of the Great GOD Emancipator. And when she becomes an adult, she will be queen of Tusikur, so she wanted to travel the world while she was still young. In a country, she found a small pub called Whitehouse. Just as she…

God Water likes to eat meat, fish and chocolate very much, but unfortunately, the doctor tells him that some sequence of eating will make them poisonous. Every hour, God Water will eat one kind of food among meat, fish and chocolate. If there are 33 …

这场打得还是比较爽的,但是队友差一点就再过一题,还是难受啊. 每天都有新的难过 A. Magic Mirror Jessie has a magic mirror. Every morning she will ask the mirror: 'Mirror mirror tell me, who is the most beautiful girl in the world?' If the mirror says her name, she will praise the mirror: '…

Participate in E-sports 11.44% 1000ms 65536K   Jessie and Justin want to participate in e-sports. E-sports contain many games, but they don't know which one to choose, so they use a way to make decisions. They have several boxes of candies, and there…

Mathematical Curse 22.25% 1000ms 65536K   A prince of the Science Continent was imprisoned in a castle because of his contempt for mathematics when he was young, and was entangled in some mathematical curses. He studied hard until he reached adulthoo…

Transport Ship 25.78% 1000ms 65536K   There are NN different kinds of transport ships on the port. The i^{th}ith kind of ship can carry the weight of V[i]V[i] and the number of the i^{th}ith kind of ship is 2^{C[i]} - 12C[i]−1. How many different sch…

Jessie and Justin want to participate in e-sports. E-sports contain many games, but they don't know which one to choose, so they use a way to make decisions. They have several boxes of candies, and there are ii candies in the i^{th}ith box, each cand…

There are NN different kinds of transport ships on the port. The i^{th}ith kind of ship can carry the weight of V[i]V[i] and the number of the i^{th}ith kind of ship is 2^{C[i]} - 12C[i]−1. How many different schemes there are if you want to use thes…

God Water likes to eat meat, fish and chocolate very much, but unfortunately, the doctor tells him that some sequence of eating will make them poisonous. Every hour, God Water will eat one kind of food among meat, fish and chocolate. If there are 33 …

Bob is a sorcerer. He lives in a cuboid room which has a length of AA, a width of BB and a height of CC, so we represent it as AA * BB * CC. One day, he finds that his room is filled with unknown dark energy. Bob wants to neutralize all the dark ener…

Now you have a string consists of uppercase letters, two integers AA and BB. We call a substring wonderful substring when the times it appears in that string is between AA and BB (A \le times \le BA≤times≤B). Can you calculate the number of wonderful…

There are NN children in kindergarten. Miss Li bought them NN candies. To make the process more interesting, Miss Li comes up with the rule: All the children line up according to their student number (1...N)(1...N), and each time a child is invited,…

A prince of the Science Continent was imprisoned in a castle because of his contempt for mathematics when he was young, and was entangled in some mathematical curses. He studied hard until he reached adulthood and decided to use his knowledge to esca…

Jessie has a magic mirror. Every morning she will ask the mirror: 'Mirror mirror tell me, who is the most beautiful girl in the world?' If the mirror says her name, she will praise the mirror: 'Good guy!', but if the mirror says the name of another p…

// 2019.10.7 练习赛 // 赛题来源:2018 ICPC 焦作区域赛 // CF链接:http://codeforces.com/gym/102028 A Xu Xiake in Henan Province 题目大意 有四个旅游地,给出 n 个人去四个地方的旅游次数,根据他去过旅游地个数输出相应等级. 思路 签到题...(队友在干嘛呀,10min过去了600人交题了啊我们怎么还没AC AC代码 #include<iostream> #include<cstdio> u…

ACM-ICPC 2018 焦作赛区网络预赛 Give Candies n个糖果分给n个小朋友 从1到n个小朋友依次给,每次随机给个数,至少一个,知道没有糖果为止. 问糖果的分布情况方案数. 输出方案数mod 109+710^9+7109+7 考虑只有前i个小朋友得到糖的情况,于是等价于将n个糖果分为i堆,插板法易得方案数是(n−1i−1)\binom{n-1}{i-1}(i−1n−1​) 总方案数∑i=1n(n−1i−1)=2n−1\sum_{i=1}^{n}\binom{n-1}{i-1}=…

Jessie and Justin want to participate in e-sports. E-sports contain many games, but they don't know which one to choose, so they use a way to make decisions. They have several boxes of candies, and there are ii candies in the i^{th}i th box, each can…

题意:四个操作,区间加,区间每个数乘,区间的数变成 2^64-1-x,求区间和. 题解:2^64-1-x=(2^64-1)-x 因为模数为2^64,-x%2^64=-1*x%2^64 由负数取模的性质可知 也就 =(2^64-1)*x%2^64 所以 2^64-1-x=2^64-1+(2^64-1)*x 所以第三个操作也就变成了区间乘 和区间加.  然后就是树剖加线段树多重标记.表示这是第一次写多重标记,整体凭感觉,细节看题解,树剖有点点遗忘,不过还好.今天看群里说邀请赛没什么价值,,细想一下那…

题目链接:https://nanti.jisuanke.com/t/31716 题目大意:有n个孩子和n个糖果,现在让n个孩子排成一列,一个一个发糖果,每个孩子随机挑选x个糖果给他,x>=1,直到无糖果剩余为止.给出数字n,问有多少种分发糖果的方法. 样例输入 复制 1 4 样例输出 复制 8 解题思路:我们可以这样想,一个糖果的话,应该是只有1种方法记为x1,如果是两个糖果的话,有两种方法即为x2,分别为(1,1)和(2),从中我们可以想到如果n个糖果的话,就可以分为第n个人取1个的话就有x(…

https://nanti.jisuanke.com/t/31719 题意 让你分别判断n或(n-1)*n/2是否是完全平方数 分析 二分高精度开根裸题呀.经典题:bzoj1213 用java套个板子求出平方根,再乘回来检验一下就好. import java.util.*; import java.math.*; public class Main{ static BigInteger check(BigInteger n,BigInteger x) { BigInteger ans=BigIn…

https://nanti.jisuanke.com/t/31721 题意 有肉,鱼,巧克力三种食物,有几种禁忌,对于连续的三个食物:1.这三个食物不能都相同:2.若三种食物都有的情况,巧克力不能在中间:3.如果两边是巧克力,中间不能是肉或鱼.求方案数. 分析 将meat ,  chocolate,fish 用 0 ,1 , 2 表示. 对于 n 来说,我们只关注后两位,因为 若 n - 1 的所有方案解决的话,我们在 n - 1 的方案添加0, 1,2 就行,然后根据禁忌 去除不可能的方案.…

https://nanti.jisuanke.com/t/31720 题意 t组样例,n种船只,q个询问,接下来n行给你每种船只的信息:v[i]表示这个船只的载重,c[i]表示这种船只有2^(c[i]−1)只. 对于每个询问,求用这些船装s的货物的方案数有多少,用到的船必须装满. 分析 一眼就是背包类的题,多重背包求方案数,将数量为m的物体分为log2(m)种物体,然后做01背包.在这里只需改改多重背包模板的转移式子就好. 背包九讲小总结:https://www.cnblogs.com/fht-…