有点像计蒜之道里的 京东的物流路径 题目描述 给定一棵 N 个节点的树,每个节点有一个正整数权值.记节点 i 的权值为 Ai.考虑节点 u 和 v 之间的一条简单路径,记 dist(u, v) 为其长度,gcd(u, v) 为路径上所有节点(包含 u 和 v)的权值的最大公因子.min(u, v) 为路径上所有节点的权值的最小值.请求出所有节点对 (u, v) 中 dist(u, v) · gcd(u, v) · min(u, v) 的最大值 输入格式 输入的第一行包含一个整数 T,代表测试数据…

目录 题意 解析 AC_code @(Codechef March Cook-Off 2018. Maximum Tree Path) 题意 给你一颗\(n(1e5)\)个点有边权有点权的树,\(Min(u,v)\)表示\(u,v\)路径最小点权,\(gcd(u,v)\)表示\(u,v\)路径点权的最大公因数,\(dis(u,v)\)表示\(u,v\)路径大小. 输出\(max(dis(u,v)*gcd(u,v)*Min(u,v))\) 解析 法一: 外层枚举路径的gcd,并把两端点是gcd倍数…

6690: Transit Tree Path 时间限制: 1 Sec  内存限制: 128 MB提交: 472  解决: 132[提交] [状态] [讨论版] [命题人:admin] 题目描述 You are given a tree with N vertices.Here, a tree is a kind of graph, and more specifically, a connected undirected graph with N−1 edges, where N is the…

Delay Constrained Maximum Capacity Path Time Limit: 20 Sec Memory Limit: 256 MB 题目连接 http://acm.hdu.edu.cn/showproblem.php?pid=1839 Description Consider an undirected graph with N vertices, numbered from 1 to N, and M edges. The vertex numbered with…

问题 D: Transit Tree Path   You are given a tree with N vertices.Here, a tree is a kind of graph, and more specifically, a connected undirected graph with N−1 edges, where N is the number of its vertices.The i-th edge (1≤i≤N−1) connects Vertices ai and…

376. Binary Tree Path Sum Given a binary tree, find all paths that sum of the nodes in the path equals to a given number target. A valid path is from root node to any of the leaf nodes. Example Example 1: Input: {1,2,4,2,3} 5 Output: [[1, 2, 2],[1, 4…

Delay Constrained Maximum Capacity Path Time Limit: 10000/10000 MS (Java/Others)    Memory Limit: 65535/65535 K (Java/Others)Total Submission(s): 1790    Accepted Submission(s): 577 Problem Description Consider an undirected graph with N vertices, nu…

地址https://www.codechef.com/LTIME58B?order=desc&sortBy=successful_submissions 简单做了一下,前三题比较水,第四题应该算是经典题 AChef and Friends 直接暴力枚举即可 #include<cstdio> #include<cstring> #include<algorithm> using namespace std; , INF = 1e9 + ; inline int r…

The Street Problem Code: STREETTA https://www.codechef.com/problems/STREETTA Submit Tweet All submissions for this problem are available. Read problems statements in Mandarin Chineseand Russian. The String street is known as the busiest street in Cod…

PSHTTR: Pishty 和城堡题目描述Pishty 是生活在胡斯特市的一个小男孩.胡斯特是胡克兰境内的一个古城,以其中世纪风格的古堡和非常聪明的熊闻名全国.胡斯特的镇城之宝是就是这么一座古堡,历史上胡斯特依靠这座古堡抵挡住了疯人国的大军.对于 Pishty 来说,真正吸引他的是古堡悠长的走廊和高耸的钟楼,以及深藏于其中的秘密……古堡可以用一棵 N 个节点的树的描述,树中有 N − 1 条无向边,每条边有一个魔法数字 C.当一个旅游团参观古堡时,他们会选择树上 U 到 V 的路径游览.他们认…