题意 有$n​$个小朋友,给每个人分$1~m​$个糖果,有k个限制 限制形如$(x,y,z)​$ 表示第$x​$个人分到的糖数减去第$y​$个人分到的糖数不大于$z​$,给第$i​$个人$j​$颗糖获得的满意度为$w_{i,j}​$,问总满意度最大值 点$(i,j)$表示第$i$个人分$j$个糖,当这个点属于$s$集合成立,因为是求满意度最大值,所以负权建边,同时加上个最大值$Max$使得满足最大流模板,假设不考虑限制,对于每一个$i$,连边$(i,j)\rightarrow (i,j+1),j…

Give out candies Time Limit: 6000/3000 MS (Java/Others)    Memory Limit: 524288/524288 K (Java/Others)Total Submission(s): 218    Accepted Submission(s): 66 Problem Description There are n children numbered 1 to n, and HazelFan's task is to give out…

hdu 6126 Give out candies(最小割) 题意: 有\(n\)个小朋友,标号为\(1\)到\(n\),你要给每个小朋友至少\(1\)个且至多\(m\)个的糖果.小朋友们共提出\(k\)个要求,每个要求包括三个整数\(x,y,z\),表示\(x\)号小朋友得到的糖果数减去\(y\)号小朋友得到的糖果数,结果应当不大于\(z\).如果你给\(i\)号小朋友\(j\)颗糖果,他会获得\(w_{i,j}\) 的满意度,你需要最大化所有小朋友的满意度之和.\(1\leq n,m\leq…

题目链接: Hdu 5407 CRB and Candies 题目描述: 给出一个数n,求lcm(C(n,0),C[n,1],C[n-2]......C[n][n-2],C[n][n-1],C[n][n])%(1e9+7)是多少? 解题思路: 刚开始的时候各种开脑洞,然后卡题卡的风生水起.最后就上了数列查询这个神奇的网站,竟然被我找到了!!!!就是把题目上给的问题转化为求lcm(1, 2, 3, 4 ...... n-2, n-1, n, n-1) / (n+1),扎扎就打了两个表一个lcm[n…

看了标程的压位,才知道压位也能很容易写- - /* HDU 6085 - Rikka with Candies [ 压位 ] | 2017 Multi-University Training Contest 5 题意: 给定 A[N], B[N], Q 个 k 对于每个k, 求 A[i] % B[j] == k 的 (i,j)对数 限制 N, Q <=50000 分析: 对于每个 B[i] 按其倍数分块,则对于 A[j] ∈ [x*B[i],(x+1)*B[i]) , A[j]%B[i] = A…

Dogs' Candies Time Limit: 30000/30000 MS (Java/Others) Memory Limit: 512000/512000 K (Java/Others) Total Submission(s): 1701 Accepted Submission(s): 404 Problem Description Far far away, there live a lot of dogs in the forest. Unlike other dogs, thos…

题目链接 Problem Description As we know, Rikka is poor at math. Yuta is worrying about this situation, so he gives Rikka some math tasks to practice. There is one of them: There are n children and m kinds of candies. The ith child has Ai dollars and the…

[题目链接] http://acm.hdu.edu.cn/showproblem.php?pid=6085 [题目大意] 给出一个数组a一个数组b,以及询问数组c, 问对于每个c有多少对a%b=c,答案对2取模 [题解] 考虑对2取模我们发现答案等价于数字的xor,01状态可以用bitset保存, 在bitset上存a的权值数组,那么每次只要将b*i~b*(i+1)-1的数值xor到答案数组的0~b-1上去即可, 鉴于bitset没有截取区间的功能,我们手写压位, 考虑压32位之后不是32倍数的…

题目链接:http://acm.hdu.edu.cn/showproblem.php?pid=6085 题意:存在两个长度为n,m的数组A,B.有q个询问,每个询问有一个数字k,可以得到Ai%Bj=k的种数,求种数. 解法:打表出所有查询k,k<Bi,从最大的Bi开始枚举.如果a%b==k,那么(a-k)%b==0,考虑用bitset来加速,复杂度O(n*n/32*5),要想跑得最快需要手写bitset. #include <bits/stdc++.h> using namespace…

题目地址:pid=5407">HDU 5407 题意:CRB有n颗不同的糖果,如今他要吃掉k颗(0<=k<=n),问k取0~n的方案数的最小公倍数是多少. 思路:首先做这道题我们须要必备的几个技能点. 1. LCM(C(n,0), C(n,1),-, C(n,n))=LCM(1,2,3,-n+1)/(n+1).额,这个有一篇证明Kummer定理 2.(1) 乘法逆元定义: 满足a*k≡1 (mod p)的k值就是a关于p的乘法逆元(a,p互质). (2)为什么要用乘法逆元: 当…

CRB and Candies Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 65536/65536 K (Java/Others)Total Submission(s): 722    Accepted Submission(s): 361 Problem Description CRB has N different candies. He is going to eat K candies.He wonders how ma…

题目链接:http://acm.hdu.edu.cn/showproblem.php?pid=1514 题目意思:有4堆糖果,每堆糖果有n个,从上到下排好,取糖果只能从上往下取,取完的糖果放在篮子里,篮子里最多放5个,如果篮子里有两个颜色相同的糖果则可以取走放进口袋里,问最多能取走多少对糖果放进口袋.n<=40, 糖果颜色最多20种. 这题是抄这个人滴:http://fudq.blog.163.com/blog/static/1913502382014239225290/ 有些地方看得不太懂,本…

CRB and Candies Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 65536/65536 K (Java/Others)Total Submission(s): 453    Accepted Submission(s): 222 Problem Description   CRB has N different candies. He is going to eat K candies.He wonders how…

Problem Description As we know, Rikka is poor at math. Yuta is worrying about this situation, so he gives Rikka some math tasks to practice. There is one of them:There are n children and m kinds of candies. The ith child has Ai dollars and the unit p…

CRB and Candies Problem's Link Mean: 给定一个数n,求LCM(C(n,0),C(n,1),C(n,2)...C(n,n))的值,(n<=1e6). analyse: 很有趣的一道数论题! 看了下网上别人的做法,什么Kummer定理我还真没听说过,仔细研究一下那个鬼定理真是涨姿势了! 然而这题我并不是用Kummer那货搞的(what?). 其实这题真的很简单(不要打我),为什么这样说呢?看了下面的解释你就知道我没骗你. 首先我们看一下这个式子:LCM(C(n,0…

题意:给一个正整数k,求lcm((k, 0), (k, 1), ..., (k, k)) 解法:在oeis上查了这个序列,得知答案即为lcm(1, 2, ..., k + 1) / (k + 1),而分子有一个递推式,如果k为一个质数x的某次幂,那么ans[k]为ans[k - 1] * m,否则ans[k] = ans[k - 1].做除法的时候用了逆元,因为取模来着. 代码: #include<stdio.h> #include<iostream> #include<al…

题意: 输入n,求c(n,0)到c(n,n)的所有组合数的最小公倍数. 输入: 首行输入整数t,表示共有t组测试样例. 每组测试样例包含一个正整数n(1<=n<=1e6). 输出: 输出结果(mod 1e9+7). 感觉蛮变态的,从比赛开始我就是写的这道题,比赛结束还是没写出来…… 期间找到了逆元,最小公倍数,组合数的各种公式,但是爆了一下午tle. 比赛结束,题解告诉我,公式秒杀法…… 但是公式看不懂,幸好有群巨解说,所以有些听懂了,但还是需要继续思考才能弄懂. 题解: 设ans[i]表示i…

[题目链接]pid=5407">click here~~ [题目大意]求LCM(Cn0,Cn1,Cn2....Cnn)%MOD 的值 [思路]来图更直观: 这个究竟是怎样推出的.说实话.本人数学归纳大法没有推出来,幸得一个大神给定愿文具体证明.点击这里:click here~~ 代码: #include <bits/stdc++.h> using namespace std; const int N=1e6+10; const int MOD=1e9+7; typedef lo…

题目给出n,m,k 然后给出n*m的矩阵a[i][j]代表第i个人在获得j 颗糖果能得到的满足值, 然后k是k行每行输入三个整数x,y,z     ,x,y,z表示一组限制表示第x个人分到的糖数减去第y个人分到的糖数不大于z: 数据小,考虑网络流(*^_^*) 因为题目的z可能为负数,而网络流建边容量时的负数概念不能被覆盖,所有建立一个等效‘0’位置的值,sign=1000(大于负数绝对值就行) 对于每个人,我们把他拆成m个点,源点向第一个点连inf流量的边,而剩余的点连sign-a[][]中存…

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http://acm.hdu.edu.cn/showproblem.php?pid=5795 A Simple Nim Problem Description   Two players take turns picking candies from n heaps,the player who picks the last one will win the game.On each turn they can pick any number of candies which come from…

题目链接: http://acm.hdu.edu.cn/showproblem.php?pid=5795 A Simple Nim Time Limit: 2000/1000 MS (Java/Others)Memory Limit: 65536/65536 K (Java/Others) 问题描述 Two players take turns picking candies from n heaps,the player who picks the last one will win the…

C. Om Nom and Candies 无线超大背包问题 #include <iostream> #include <cstdio> #include <cstring> #include <cmath> #include <algorithm> #include <string> #include <vector> #include <set> #include <map> #include…

A Simple Nim 题目链接: http://acm.hdu.edu.cn/showproblem.php?pid=5795 Description Two players take turns picking candies from n heaps,the player who picks the last one will win the game.On each turn they can pick any number of candies which come from the…

题目链接: hdu:http://acm.hdu.edu.cn/showproblem.php?pid=5651 bc:http://bestcoder.hdu.edu.cn/contests/contest_showproblem.php?cid=682&pid=1002 xiaoxin juju needs help  Accepts: 150  Submissions: 966  Time Limit: 2000/1000 MS (Java/Others)  Memory Limit: 6…

xiaoxin and his watermelon candy 题目连接: http://acm.hdu.edu.cn/showproblem.php?pid=5654 Description During his six grade summer vacation, xiaoxin got lots of watermelon candies from his leader when he did his internship at Tencent. Each watermelon cand…

xiaoxin juju needs help 题目连接: http://acm.hdu.edu.cn/showproblem.php?pid=5651 Description As we all known, xiaoxin is a brilliant coder. He knew palindromic strings when he was only a six grade student at elementry school. This summer he was working a…

Candy Distribution 题目连接: http://acm.hdu.edu.cn/showproblem.php?pid=5291 Description WY has n kind of candy, number 1-N, The i-th kind of candy has ai. WY would like to give some of the candy to his teammate Ecry and lasten. To be fair, he hopes that…

Break the Chocolate Time Limit: 20 Sec  Memory Limit: 256 MB 题目连接 http://acm.hdu.edu.cn/showproblem.php?pid=4112 Description Benjamin is going to host a party for his big promotion coming up.Every party needs candies, chocolates and beer, and of cour…

题目链接:http://acm.hdu.edu.cn/showproblem.php?pid=5407 题目: Problem Description CRB has N different candies. He is going to eat K candies.He wonders how many combinations he can select.Can you answer his question for all K(0 ≤ K ≤ N)?CRB is too hungry to…