P2983 [USACO10FEB]购买巧克力Chocolate Buying 题目描述 Bessie and the herd love chocolate so Farmer John is buying them some. The Bovine Chocolate Store features N (1 <= N <= 100,000) kinds of chocolate in essentially unlimited quantities. Each type i of choc…

P2983 [USACO10FEB]购买巧克力Chocolate Buying 题目描述 Bessie and the herd love chocolate so Farmer John is buying them some. The Bovine Chocolate Store features N (1 <= N <= 100,000) kinds of chocolate in essentially unlimited quantities. Each type i of choc…

购买巧克力Chocolate Buying 乍一看以为是背包,然后交了一个感觉没错的背包上去. #include <iostream> #include <cstdio> #include <cstring> #include <algorithm> using namespace std; //Mystery_Sky // #define M 10000000 #define ll long long ll f[M]; ll p[M], num[M], s…

题目描述 Bessie and the herd love chocolate so Farmer John is buying them some. The Bovine Chocolate Store features N (1 <= N <= 100,000) kinds of chocolate in essentially unlimited quantities. Each type i of chocolate has price P_i (1 <= P_i <= 1…

题目描述 Bessie and the herd love chocolate so Farmer John is buying them some. The Bovine Chocolate Store features N (1 <= N <= 100,000) kinds of chocolate in essentially unlimited quantities. Each type i of chocolate has price P_i (1 <= P_i <= 1…

题目描述 Bessie and the herd love chocolate so Farmer John is buying them some. The Bovine Chocolate Store features N (1 <= N <= 100,000) kinds of chocolate in essentially unlimited quantities. Each type i of chocolate has price P_i (1 <= P_i <= 1…

https://www.luogu.org/problem/show?pid=2983 题目描述 Bessie and the herd love chocolate so Farmer John is buying them some. The Bovine Chocolate Store features N (1 <= N <= 100,000) kinds of chocolate in essentially unlimited quantities. Each type i of…

题目描述 Bessie and the herd love chocolate so Farmer John is buying them some. The Bovine Chocolate Store features N (1 <= N <= 100,000) kinds of chocolate in essentially unlimited quantities. Each type i of chocolate has price P_i (1 <= P_i <= 1…

题目传送门 继续dp刷题计划,看到这道题,第一眼感觉不就是显然的完全背包嘛.把背包打完要开始填充数组大小的时候成为了mengbier,发现数据极大,达到了1e18.显然这不是一道平凡的背包题目. 于是看了题解.wtf?这题是贪心??? emmm冷静分析:首先我们比较背包模型和这个模型,背包花费这一定的体积,那些价值一定会获得.而这个模型中,我们每花费一定的钱(体积),却只能满足一只奶牛.这是本题的关键. 那么就很难继续满足完全背包的性质了. 真想用背包?看到讨论里有人说如果这题写背包,那也得是多…

传送门 按价格排序后贪心 ——代码 #include <cstdio> #include <iostream> #include <algorithm> int n; long long m, ans; struct node { long long x, y; }p[]; inline long long read() { , f = ; char ch = getchar(); ; ) + (x << ) + ch - '; return x * f;…

P2985 [USACO10FEB]吃巧克力Chocolate Eating 题目描述 Bessie has received N (1 <= N <= 50,000) chocolates from the bulls, but doesn't want to eat them too quickly, so she wants to plan out her chocolate eating schedule for the next D (1 <= D <= 50,000)…

P2983 [USACO10FEB]购买巧克力 题解 注意题目开 long long 贪心策略:价格从低到高,买够为止 反证:若剩下的有一个K”,比K小,那么交换,稳赚不赔 所以,在买K之前,所有比他便宜的都买完了 代码 #include<iostream> #include<cstdio> #include<algorithm> #include<cmath> #include<string> #include<cstring> #…

题目描述 Bessie拿到了N (1 <= N <= 50,000)块巧克力.她决定想个办法吃掉这些巧克力,使得它在吃巧克力的这段时间里,最不开心的一天尽可能的开心.并且一共吃D (1 <= D <= 50,000)天. 每块巧克力有一个开心值H_i (1 <= H_i <= 1,000,000),当某天你吃下那块巧克力时,你将获得那块巧克力的开心值.每一天的开心值是所有当天吃掉的巧克力的总开心值之和.每天晚上Bessie睡觉之后,它的开心值会减半.也就是说,比如昨天B…

题目描述 Farmer John is distributing chocolates at the barn for Valentine's day, and B (1 <= B <= 25,000) of his bulls have a special cow in mind to receive a chocolate gift. Each of the bulls and cows is grazing alone in one of the farm's N (2*B <=…

题目:洛谷P2985. 题目大意:有n块巧克力要吃d天,并且只能按顺序吃.一块巧克力有一个开心值,吃了就能增加开心值.一个人初始开心值为0,且每天早上开心值变为原来的一半.问如何吃巧克力才能使开心值最小的一天开心值最大(每天都按吃完巧克力后计算),且需要输出方案. 解题思路:最大化最小值问题,用二分答案. 贪心地扫描,对于一个答案,如果开心值不到这个答案,就一直吃巧克力即可. 最后输出吃的方案时也用此种贪心法. 注意如果最后巧克力没有吃完,则在最后一天全部吃掉. C++ Code: #inclu…

https://www.luogu.org/problem/show?pid=2984 题目描述 Farmer John is distributing chocolates at the barn for Valentine's day, and B (1 <= B <= 25,000) of his bulls have a special cow in mind to receive a chocolate gift. Each of the bulls and cows is graz…

题目链接 Solution 先直接二分答案,然后贪心判断,一旦少于答案就吃一块. 思路很简单,有一点细节. 一天内可以不吃巧克力. 注意处理最后时没吃完的全部在最后一天吃完. Code #include<bits/stdc++.h> #define ll long long #define N 50008 #define inf 0x3f3f3f3f3f3f3f using namespace std; void in(ll &x) { char ch=getchar();ll f=1…

题目链接:https://www.luogu.org/problemnew/show/P2984 练习SPFA,把FJ当做起点,求出到所有牛的最短路,再把两个牛的相加. #include <cstdio> #include <queue> #include <iostream> #include <algorithm> #include <cstring> using namespace std; ; const int inf = 0x7fff…

题意简叙: FarmerFarmerFarmer JohnJohnJohn有B头奶牛(1<=B<=25000)(1<=B<=25000)(1<=B<=25000),有N(2∗B<=N<=50000)N(2*B<=N<=50000)N(2∗B<=N<=50000)个农场,编号1−N1-N1−N,有M(N−1<=M<=100000)M(N-1<=M<=100000)M(N−1<=M<=100000)条双…

洛谷 P2616 [USACO10JAN]购买饲料II Buying Feed, II https://www.luogu.org/problemnew/show/P2616 题目描述 Farmer John needs to travel to town to pick up K (1 <= K <= 100) pounds of feed. Driving D miles with K pounds of feed in his truck costs D*K cents. The cou…

P2616 [USACO10JAN]购买饲料II Buying Feed, II 题目描述 Farmer John needs to travel to town to pick up K (1 <= K <= 100) pounds of feed. Driving D miles with K pounds of feed in his truck costs D*K cents. The county feed lot has N (1 <= N <= 100) stores…

Description     贝西和其他奶牛们都喜欢巧克力,所以约翰准备买一些送给她们.奶牛巧克力专卖店里 有N种巧克力,每种巧克力的数量都是无限多的.每头奶牛只喜欢一种巧克力,调查显示, 有Ci头奶牛喜欢第i种巧克力,这种巧克力的售价是P.     约翰手上有B元预算,怎样用这些钱让尽量多的奶牛高兴呢?下面举个例子:假设约翰 有50元钱,商店里有S种巧克力:   巧克力品种     单价 高兴的奶牛数量     1     2     3     4     5     5     1   …

http://www.lydsy.com/JudgeOnline/problem.php?id=2014 这应该是显然的贪心吧,先排序,然后按花费取 #include <cstdio> #include <cstring> #include <cmath> #include <string> #include <iostream> #include <algorithm> #include <queue> using na…

题目描述     贝西和其他奶牛们都喜欢巧克力,所以约翰准备买一些送给她们.奶牛巧克力专卖店里 有N种巧克力,每种巧克力的数量都是无限多的.每头奶牛只喜欢一种巧克力,调查显示, 有Ci头奶牛喜欢第i种巧克力,这种巧克力的售价是P.     约翰手上有B元预算,怎样用这些钱让尽量多的奶牛高兴呢?下面举个例子:假设约翰 有50元钱,商店里有S种巧克力:   巧克力品种     单价 高兴的奶牛数量     1    2    3    4    5     5    1    10    7    …

洛谷 P2984 [USACO10FEB]给巧克力Chocolate Giving 洛谷传送门 JDOJ 2680: USACO 2010 Feb Silver 2.Chocolate Giving JDOJ传送门 Description Farmer John is distributing chocolates at the barn for Valentine's day, and B (1 <= B <= 25,000) of his bulls have a special cow…

中国程序化购买广告解析:RTB/DSP/Ad Exchange/SSP/DMP 概念 程序化购买( Programmatic Buying):通过数字化.自动化.系统化的方式改造广告主.代理公司.媒体平台,进行程序化对接,帮助其找出与受众匹配的广告信息,并通过程序化购买的方式进行广告投放,并实时反馈投放报表.程序化购买把从广告主到媒体的全部投放过程进行了程序化投放,实现了整个数字广告产业链的自动化.程序化购买按照交易是否公开可以分为公开交易和私有交易,公开交易主要以 RTB 实时竞价模式: 私有…

洛谷 P2616 [USACO10JAN]购买饲料II Buying Feed, II 洛谷传送门 JDOJ 2671: USACO 2010 Jan Silver 2.Buying Feed, II JDOJ传送门 Description Farmer John needs to travel to town to pick up K (1 <= K <= 100) The county feed lot has N (1 <= N <= 100) stores (conveni…

好吃的巧克力 超市正在特价售卖巧克力,正好被贪吃的Lucky_dog看见了. 巧克力从左到右排成一排,一共有N个,M种. 超市有一个很奇怪的规定,就是你在购买巧克力时必须提供两个数字a和b,代表你要购买第 a 个至第 b 个巧克力(包含 a 和 b)之间的所有巧克力. 假设所有巧克力的单价均为1元.Lucky_dog想吃所有种类的巧克力,但又想省钱.作为Lucky_dog的朋友,他请你来帮他决定如何选择购买巧克力时的 a 和 b. 输入格式: 第一行包含两个正整数 N 和 M(M<=N, N<…

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