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…

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 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…

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…

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…

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…

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…

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…

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…