题目:Toll 传送门:http://acm.csu.edu.cn/csuoj/problemset/problem?pid=1806 题目简述:给定n个点m条有向边的有向图,每条边的花费是$b_i * t +d_i$,设f(t)表示给定t的时候1-n的最小花费,求:${\frac{\int_0^T{f(t)dt}}{T}}$ 分析: (1)f(t)可用最短路求出来. (2)积分值可用自适应辛普森积分法计算. 注意:有向图! 代码: #include <cstdio> #include <…

D - Toll RoadTime Limit: 20 Sec Memory Limit: 256 MB 题目连接 http://acm.hust.edu.cn/vjudge/contest/view.action?cid=87493#problem/D Description Exactly N years ago, a new highway between two major cities was built. The highway runs from west to east. It…

UVA 10537 - The Toll! Revisited option=com_onlinejudge&Itemid=8&page=show_problem&category=550&problem=1478&mosmsg=Submission+received+with+ID+14135315" target="_blank" style="">题目链接 题意:给定一个无向图,大写字母是城市,小写字母是…

difkstra + 路径输出 The Toll! Revisited Time Limit: 3000MS Memory Limit: Unknown 64bit IO Format: %lld & %llu [Submit]   [Go Back]   [Status] Description Problem G Toll! Revisited Input: Standard Input Output: Standard Output Time Limit: 1 Second Sindbad…

1774: [Usaco2009 Dec]Toll 过路费 Time Limit: 10 Sec  Memory Limit: 64 MBSubmit: 263  Solved: 154[Submit][Status][Discuss] Description 跟所有人一样,农夫约翰以着宁教我负天下牛,休叫天下牛负我的伟大精神,日日夜夜苦思生 财之道.为了发财,他设置了一系列的规章制度,使得任何一只奶牛在农场中的道路行走,都 要向农夫约翰上交过路费. 农场中由N(1 <= N <= 250)片…

题目描述 Like everyone else, FJ is always thinking up ways to increase his revenue. To this end, he has set up a series of tolls that the cows will pay when they traverse the cowpaths throughout the farm. The cows move from any of the N (1 <= N <= 250)…

BZOJ_1774_[Usaco2009 Dec]Toll 过路费_floyd 题意: 跟所有人一样,农夫约翰以着宁教我负天下牛,休叫天下牛负我的伟大精神,日日夜夜苦思生 财之道.为了发财,他设置了一系列的规章制度,使得任何一只奶牛在农场中的道路行走,都 要向农夫约翰上交过路费. 农场中由N(1 <= N <= 250)片草地(标号为1到N),并且有M(1 <= M <= 10000)条 双向道路连接草地A_j和B_j(1 <= A_j <= N; 1 <= B_…

Toll! Revisited 大致题意:有两种节点,一种是大写字母,一种是小写字母. 首先输入m条边.当经过小写字母时须要付一单位的过路费.当经过大写字母时,要付当前財务的1/20做过路费. 问在起点最少须要带多少物品使到达终点时还有k个物品. 当有多条符合条件的路径时输出字典序最小的一个. 思路:已知终点的权值,那么能够从终点向前推. 求终点到起点的最短路径,然后按字典序打印路径. 比較难处理的是:向前推时前驱节点的权值计算.列个方程算算就能够了,主要时不能整除的情况. 计算前驱结点dis值…

https://www.luogu.org/problem/show?pid=2966 题目描述 Like everyone else, FJ is always thinking up ways to increase his revenue. To this end, he has set up a series of tolls that the cows will pay when they traverse the cowpaths throughout the farm. The c…

P2966 [USACO09DEC]牛收费路径Cow Toll Paths 题目描述 Like everyone else, FJ is always thinking up ways to increase his revenue. To this end, he has set up a series of tolls that the cows will pay when they traverse the cowpaths throughout the farm. The cows mo…