Yogurt factory Time Limit: 1000MS   Memory Limit: 65536K Total Submissions: 8205   Accepted: 4197 Description The cows have purchased a yogurt factory that makes world-famous Yucky Yogurt. Over the next N (1 <= N <= 10,000) weeks, the price of milk…

酸奶工厂 题目大意:酸奶工厂每个星期都要制造酸奶,成本每单位x,然后每个星期要生产y,然后酸奶厂有个巨大的储存室,可以无限储存酸奶,而且酸奶的品质不会变坏,每天储存要每单位花费S,求最小的成本. 简直是初中生数学题,贪心法即可,假如当前酸奶成本是X,则如果储存酸奶,则下k个星期的(如果还使用这批酸奶),则成本为x+k*s,对比k个星期的成本就可以确定用哪个了. 水题 #include <iostream> #include <functional> #include <alg…

Description The cows have purchased a yogurt factory that makes world-famous Yucky Yogurt. Over the next N (1 <= N <= 10,000) weeks, the price of milk and labor will fluctuate weekly such that it will cost the company C_i (1 <= C_i <= 5,000) c…

有一家生产酸奶的公司,连续n周,每周需要出货numi的单位,已经知道每一周生产单位酸奶的价格ci,并且,酸奶可以提前生产,但是存储费用是一周一单位s费用,问最少的花费. 对于要出货的酸奶,要不这一周生产,要不提前生产. 什么时候采用什么生产方式呢? 若第i周的货提前生产的话,假设在j周生产,则费用为(i-j)*s+c[j] 若c[i]>(i-j)*s+c[j],则更新c[i]=(i-j)*s+c[j] 更新要O(n^2)? 可以证明,最优的生产方式是,要不在这一周生产,要不在上一周生产(这里的上…

Description The cows have purchased a yogurt factory that makes world-famous Yucky Yogurt. Over the next N (1 <= N <= 10,000) weeks, the price of milk and labor will fluctuate weekly such that it will cost the company C_i (1 <= C_i <= 5,000) c…

POJ 2393 题意: 每周可以生产牛奶,每周生产的价格为Ci,每周需要上交的牛奶量Yi,你可以选择本周生产牛奶,也可选择提前几周生产出存储在仓库中(仓库无限大,而且保质期不考虑),每一周存仓库牛奶需要花费S元,让你求出所有周的需求量上交的最少花费. 分析: 因为第 i 周的奶酪,可以在第 i 周生产,也可以在前几周生产,然后储存.通过把s转化为花费,跟原有花费去比较,取一个最小值,这样从头到尾,每一周都可以取得一个花费的最小值.贪心求解. #include<cstdio> #include…

http://poj.org/problem?id=2393 Yogurt factory Time Limit: 1000MS   Memory Limit: 65536K Total Submissions: 7341   Accepted: 3757 Description The cows have purchased a yogurt factory that makes world-famous Yucky Yogurt. Over the next N (1 <= N <= 10…

http://www.lydsy.com/JudgeOnline/problem.php?id=1680 看不懂英文.. 题意是有n天,第i天生产的费用是c[i],要生产y[i]个产品,可以用当天的也可以用以前的(多生产的).每单位产品保存一天的费用是s.求最小费用 显然贪心,每次查找之前有没有哪一天保存到现在的价值最小,然后比较更新.. #include <cstdio> #include <cstring> #include <cmath> #include <…

Yogurt factory Time Limit: 1000MS   Memory Limit: 65536K Total Submissions: 6821   Accepted: 3488 Description The cows have purchased a yogurt factory that makes world-famous Yucky Yogurt. Over the next N (1 <= N <= 10,000) weeks, the price of milk…

Yogurt factory Time Limit: 1000MS   Memory Limit: 65536K Total Submissions: 16669   Accepted: 8176 Description The cows have purchased a yogurt factory that makes world-famous Yucky Yogurt. Over the next N (1 <= N <= 10,000) weeks, the price of milk…