2018-09-19 22:34:28 问题描述: 问题求解: 本题是典型的最短路径的扩展题,可以使用Bellman Ford算法进行求解,需要注意的是在Bellman Ford算法的时候需要额外申请一个数组来保存变量. public int findCheapestPrice(int n, int[][] flights, int src, int dst, int K) { int[] dist = new int[n]; for (int i = 0; i < n; i++) dist[i…
There are n cities connected by m flights. Each fight starts from city u and arrives at v with a price w. Now given all the cities and flights, together with starting city src and the destination dst, your task is to find the cheapest price from src …
There are n cities connected by m flights. Each fight starts from city u and arrives at v with a price w. Now given all the cities and fights, together with starting city src and the destination dst, your task is to find the cheapest price from src t…
There are n cities connected by m flights. Each fight starts from city u and arrives at v with a price w. Now given all the cities and fights, together with starting city src and the destination dst, your task is to find the cheapest price from src t…
There are n cities connected by m flights. Each fight starts from city u and arrives at v with a price w. Now given all the cities and flights, together with starting city src and the destination dst, your task is to find the cheapest price from src …
原题链接在这里:https://leetcode.com/problems/cheapest-flights-within-k-stops/ 题目: There are n cities connected by m flights. Each fight starts from city u and arrives at v with a price w. Now given all the cities and flights, together with starting city src…
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 方法一:DFS 方法二:BFS 参考资料 日期 题目地址:https://leetcode.com/problems/cheapest-flights-within-k-stops/description/ 题目描述 There are n cities connected by m flights. Each fight starts from c…
There are n cities connected by m flights. Each fight starts from city u and arrives at v with a price w. Now given all the cities and fights, together with starting city src and the destination dst, your task is to find the cheapest price from src t…
参考: K最短路径算法之Yen's Algorithm Yen's algorithm 基于网络流量的SDN最短路径转发应用 K条最短路径算法:Yen's Algorithm 算法背景 K 最短路径问题是最短路径问题的扩展和变形.1959 年,霍夫曼(Hoffman) 和帕夫雷(Pavley)在论文中第一次提出k 最短路径问题. k 最短路径问题通常包括两类:有限制的k 最短路问题和无限制的K 最短路问题. 前者要求最短路径集合不含有回路,而后者对所求得的最短路径集合无限制. 算法简介 Yen'…
题目描述: 给定n,a求最大的k,使n!可以被a^k整除但不能被a^(k+1)整除. 输入: 两个整数n(2<=n<=1000),a(2<=a<=1000) 输出: 一个整数. 样例输入: 6 10 样例输出: 1 这个题首先如果数字小的话是可以考虑轮流试的,但是1000的数字范围无论是对阶乘还是幂都太大了.于是我们想一下,既然要求整除,说明每个素因子都是可以抵消的,这样我们就可以求解了.但是还要考虑到,因为后面是求哪个k,所以说我们不是对n!和a的幂分别求出对应的素数因子数组.我…