动态规划-Minimum Cost to Merge Stones】的更多相关文章

2019-07-07 15:48:46 问题描述: 问题求解: 最初看到这个问题的时候第一反应就是这个题目和打破气球的题目很类似. 但是我尝试了使用dp将问题直接转为直接合并到一个堆问题复杂度迅速提高并且并没有ac,这里的思想是和打爆气球一致的,就是找最后合并的部分. Discuss里给出了可以过的代码,思路其实和打破气球是不一致的. 这里的想法是先把i-j的数组分成K堆,然后就可以将这K堆直接merge到1堆中.因此就还有一个维度就是堆数. 总的来说,dp的题目还是非常的灵活,需要多多练习.…
There are N piles of stones arranged in a row.  The i-th pile has stones[i] stones. A move consists of merging exactly K consecutive piles into one pile, and the cost of this move is equal to the total number of stones in these K piles. Find the mini…
There are N piles of stones arranged in a row.  The i-th pile has stones[i] stones. A move consists of merging exactly K consecutive piles into one pile, and the cost of this move is equal to the total number of stones in these K piles. Find the mini…
There are N piles of stones arranged in a row.  The i-th pile has stones[i] stones. A move consists of merging exactly K consecutive piles into one pile, and the cost of this move is equal to the total number of stones in these K piles. Find the mini…
原题链接在这里:https://leetcode.com/problems/minimum-cost-to-merge-stones/ 题目: There are N piles of stones arranged in a row.  The i-th pile has stones[i] stones. A move consists of merging exactly K consecutive piles into one pile, and the cost of this mov…
Leetcode之动态规划(DP)专题-983. 最低票价(Minimum Cost For Tickets) 在一个火车旅行很受欢迎的国度,你提前一年计划了一些火车旅行.在接下来的一年里,你要旅行的日子将以一个名为 days 的数组给出.每一项是一个从 1 到 365 的整数. 火车票有三种不同的销售方式: 一张为期一天的通行证售价为 costs[0] 美元: 一张为期七天的通行证售价为 costs[1] 美元: 一张为期三十天的通行证售价为 costs[2] 美元. 通行证允许数天无限制的旅…
Description Dearboy, a goods victualer, now comes to a big problem, and he needs your help. In his sale area there are N shopkeepers (marked from 1 to N) which stocks goods from him.Dearboy has M supply places (marked from 1 to M), each provides K di…
题面 Dearboy, a goods victualer, now comes to a big problem, and he needs your help. In his sale area there are N shopkeepers (marked from 1 to N) which stocks goods from him.Dearboy has M supply places (marked from 1 to M), each provides K different k…
POJ 2516 Minimum Cost (网络流,最小费用流) Description Dearboy, a goods victualer, now comes to a big problem, and he needs your help. In his sale area there are N shopkeepers (marked from 1 to N) which stocks goods from him.Dearboy has M supply places (marke…
Minimum Cost Time Limit: 4000MS   Memory Limit: 65536K Total Submissions: 13511   Accepted: 4628 Description Dearboy, a goods victualer, now comes to a big problem, and he needs your help. In his sale area there are N shopkeepers (marked from 1 to N)…
Minimum Cost http://poj.org/problem?id=2516 Time Limit: 4000MS   Memory Limit: 65536K Total Submissions: 19019   Accepted: 6716 Description Dearboy, a goods victualer, now comes to a big problem, and he needs your help. In his sale area there are N s…
[POJ2516]Minimum Cost 题意:有N个收购商.M个供应商.K种物品.对于每种物品,每个供应商的供应量和每个收购商的需求量已知.每个供应商与每个收购商之间运送该物品的运费已知.求满足收购商要求的前提下的最小运费.(n,M,K<=50,每种物品供求量<=3,单位运费<=100) 题解:怎么看怎么是最小费用流,但是刚学的KM算法,还是要用一下的~ 由于各种物品间没有影响,所以可以将k种物品拆开:由于供求量≤3,所以可以将供应商和收购商都拆开,然后跑KM算法. #include…
题目链接:https://www.nowcoder.com/acm/contest/145/A A.Minimum Cost Perfect Matching You have a complete bipartite graph where each part contains exactly n nodes, numbered from 0 to n - 1 inclusive.The weight of the edge connecting two vertices with numbe…
Description Dearboy, a goods victualer, now comes to a big problem, and he needs your help. In his sale area there are N shopkeepers (marked from 1 to N) which stocks goods from him.Dearboy has M supply places (marked from 1 to M), each provides K di…
Minimum Cost Time Limit: 4000MS   Memory Limit: 65536K Total Submissions: 19088   Accepted: 6740 题目链接:http://poj.org/problem?id=2516 Description: Dearboy, a goods victualer, now comes to a big problem, and he needs your help. In his sale area there a…
题目链接:https://vjudge.net/problem/POJ-2516 Minimum Cost Time Limit: 4000MS   Memory Limit: 65536K Total Submissions: 17650   Accepted: 6205 Description Dearboy, a goods victualer, now comes to a big problem, and he needs your help. In his sale area the…
题目链接: Poj  2516  Minimum Cost 题目描述: 有n个商店,m个仓储,每个商店和仓库都有k种货物.嘛!现在n个商店要开始向m个仓库发出订单了,订单信息为当前商店对每种货物的需求量.不同的商店从不同的仓库购买不同货物花费不同,问是不是能满足所有商店的要求,如果能商店花费总和最小为多少? 解题思路: 简单的费用流,要跑K次最小花费最大流,每次只对一种货物建图跑费用流.每次建图以0为源点, [1,m]为仓库, [m+1, n+m]为商店, n+m+1为汇点.0与[1,m]连边,…
POJ 2516 Minimum Cost 链接:http://poj.org/problem?id=2516 题意:有M个仓库.N个商人.K种物品.先输入N,M.K.然后输入N行K个数,每一行代表一个商人要购买的物品,当中K个数分别表示要购买的每件商品数. 然后是M行K个数,每行表示仓库里的情况,当中K个数分别每种物品的库存量. 接下来是K个矩阵,每一个矩阵为N*M,分别表示第K种物品从M个仓库运到第N个商人的花费.问是否能合理安排,使得花费最少.假设不行就输出-1. 思路: 一開始的时候.居…
原题链接在这里:https://leetcode.com/problems/minimum-cost-tree-from-leaf-values/ 题目: Given an array arr of positive integers, consider all binary trees such that: Each node has either 0 or 2 children; The values of arr correspond to the values of each leaf …
原题链接在这里:https://leetcode.com/problems/minimum-cost-for-tickets/ 题目: In a country popular for train travel, you have planned some train travelling one year in advance.  The days of the year that you will travel is given as an array days.  Each day is…
原题链接在这里:https://leetcode.com/problems/connecting-cities-with-minimum-cost/ 题目: There are N cities numbered from 1 to N. You are given connections, where each connections[i] = [city1, city2, cost] represents the cost to connect city1 and city2together…
Minimum Cost Time Limit: 4000MS   Memory Limit: 65536K Total Submissions: 19883   Accepted: 7055 Description Dearboy, a goods victualer, now comes to a big problem, and he needs your help. In his sale area there are N shopkeepers (marked from 1 to N)…
Description Dearboy, a goods victualer, now comes to a big problem, and he needs your help. In his sale area there are N shopkeepers (marked from 1 to N) which stocks goods from him.Dearboy has M supply places (marked from 1 to M), each provides K di…
We have n chips, where the position of the ith chip is position[i]. We need to move all the chips to the same position. In one step, we can change the position of the ith chip from position[i] to: position[i] + 2 or position[i] - 2 with cost = 0. pos…
作者: 负雪明烛 id: fuxuemingzhu 个人博客:http://fuxuemingzhu.cn/ 目录 题目描述 题目大意 解题方法 Kruskal算法 日期 题目地址:https://leetcode-cn.com/problems/connecting-cities-with-minimum-cost/ 题目描述 There are N cities numbered from 1 to N. You are given connections, where each conne…
作者: 负雪明烛 id: fuxuemingzhu 个人博客:http://fuxuemingzhu.cn/ 目录 题目描述 题目大意 解题方法 小根堆 日期 题目地址:https://leetcode-cn.com/problems/minimum-cost-to-connect-sticks/ 题目描述 You have some sticks with positive integer lengths. You can connect any two sticks of lengths X…
作者: 负雪明烛 id: fuxuemingzhu 个人博客:http://fuxuemingzhu.cn/ 目录 题目描述 题目大意 解题方法 动态规划 日期 题目地址:https://leetcode.com/problems/minimum-cost-for-tickets/ 题目描述 In a country popular for train travel, you have planned some train travelling one year in advance. The…
题目如下: In a country popular for train travel, you have planned some train travelling one year in advance.  The days of the year that you will travel is given as an array days.  Each day is an integer from 1 to 365. Train tickets are sold in 3 differen…
https://vjudge.net/problem/11079/origin 题意:有N个商店和M个供应商和K种物品,每个商店每种物品有一个需求数,每个供应商每种物品有一个供应量,供应商到商店之间的运输需要花费,如果供不应求输出-1,否则输出最小花费. 思路:比较明显的最小费用流.想法大概都是源点和供应商连一条容量为供应量,花费为0的边,商店和汇点之间连一条容量为需求量,花费为0的边,供应商和商店之间连一条容量为INF,花费为题意给出的花费的边.建图的话一开始是直接对于每一个商店每一种物品和每…
一开始我把每个店主都拆成k个点,然后建图..然后TLE.. 看题解= =哦,愚钝了,k个商品是独立的,可以分别跑k次最小费用最大流,结果就是k次总和.. #include<cstdio> #include<cstring> #include<queue> #include<algorithm> using namespace std; #define INF (1<<30) #define MAXN 111 #define MAXM 111*11…