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…

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> #…

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…

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…