2020: [Usaco2010 Jan]Buying Feed, II Time Limit: 3 Sec  Memory Limit: 64 MBSubmit: 220  Solved: 162[Submit][Status] Description (buying.pas/buying.in/buying.out 128M 1S) Farmer John needs to travel to town to pick up K (1 <= K <= 100) pounds of feed…

http://www.lydsy.com/JudgeOnline/problem.php?id=2020 和背包差不多 同样滚动数组 f[j]表示当前位置j份食物的最小价值 f[j]=min(f[j-l]+l*c) 1<=l<=f 而且在每一步走的时候 f[j]+=j 然后就行了.. #include <cstdio> #include <cstring> #include <cmath> #include <string> #include &…

题目链接:http://www.lydsy.com/JudgeOnline/problem.php?id=2020 题意: FJ开车去买K份食物. 如果他的车上有X份食物,每走一里就花费X元. FJ的城市是一条线,总共n里路,有n+1个地方,标号0~n. FJ从0开始走,到n结束(不能往回走),要买m份食物. 城里有t个商店,每个商店的位置是x[i](一个点上可能有多个商店),有f[i]份食物,每份c[i]元. 问到达n并买m份食物的最小花费. 题解: 贪心. 每一份食物实际的话费 = 它的价格…

[传送门:BZOJ2020] 简要题意: 约翰开车回家,遇到了双十一节,那么就顺路买点饲料吧.回家的路程一共有E 公里,这一路上会经过N 家商店,第i 家店里有Fi 吨饲料,售价为每吨Ci 元.约翰打算买K 吨饲料,他知道商家的库存是足够的,至少所有店的库存总和不会少于K.除了购买饲料要钱,运送饲料也是要花油钱的,约翰的卡车上如果装着X 吨饲料,那么他行驶一公里会花掉X 元,行驶D 公里需要DX 元.已知第i 家店距约翰所在的起点有Xi 公里,那么约翰在哪些商店买饲料运回家,才能做到最省钱呢?…

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…

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…

数轴上n<=500个站可以买东西,每个站位置Xi,库存Fi,价格Ci,运东西价格是当前运载重量的平方乘距离,求买K<=10000个东西到达点E的最小代价. f[i,j]--到第i站不买第i站东西的最大值,转移时决策的是买上一个站的东西,f[i,j]=f(i-1,k)+(j-k)*C(i-1)+j*j*(Xi-Xi-1). 这个拆一下就可以单调队列了. #include<stdio.h> #include<string.h> #include<stdlib.h>…

BUYING FEED 时间限制:3000 ms  |  内存限制:65535 KB 难度:4   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) s…

2021: [Usaco2010 Jan]Cheese Towers Time Limit: 4 Sec  Memory Limit: 64 MBSubmit: 184  Solved: 107[Submit][Status] Description Farmer John wants to save some blocks of his cows' delicious Wisconsin cheese varieties in his cellar for the coming winter.…