爱梦者的心之旅

题目三 树上的三角形时间限制: 2000ms 内存限制: 256MB描述有一棵树，树上有只毛毛虫。[www.t262.com］它在这棵树上生活了很久，对它的构造了如指掌。所以它在树上从来都是走最短路，不会绕路。它还还特别喜欢三角形，所以当它在树上爬来爬去的时候总会在想，如果把刚才爬过的那几根树枝/树干锯下来，能不能从中选三根出来拼成一个三角形呢？输入输入数据

Language:DefaultAgri-NetTime Limit: 1000MS Memory Limit: 10000KTotal Submissions: 60933 Accepted: 25256DescriptionFarmer John has been elected mayor of his

DescriptionFarmer John had just acquired several new farms! He wants to connect the farms with roads so that he can travel from any farm to any other farm via a sequence of roads; roads already co

Divide GroupsTime Limit: 2000/1000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 2539    Accepted Submission(s): 906Problem Description  This ye

Problem Description自从Lele开发了Rating系统，他的Tetris事业更是如虎添翼，不久他遍把这个游戏推向了全球。为了更好的符合那些爱好者的喜好，Lele又想了一个新点子：他将制作一个全球Tetris高手排行榜，定时更新，名堂要比福布斯富豪榜还响。关于如何排名，这个不用说都知道是根据Rating从高到低来排，如果两个人具有相同的Rating，那就按这几个人的

技能修炼Time Limit: 1000 MSMemory Limit: 32768 KTotal Submit: 129(61 users)Total Accepted: 66(51 users)Rating: Special Judge: NoDescription寒假第三次

Virtual FriendsTime Limit: 4000/2000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 9579    Accepted Submission(s): 2793Problem DescriptionThese days

Choose the best routeTime Limit: 2000/1000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 15464    Accepted Submission(s): 5010Problem DescriptionOne

畅通工程续Time Limit: 3000/1000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 57541    Accepted Submission(s): 21612Problem Description某省自从实行了很多年的畅通工程计划后

Problem 2232 炉石传说Accept: 243    Submit: 986Time Limit: 1000 mSec    Memory Limit : 32768 KB Problem DescriptionGG学长虽然并不打炉石传说，但是由于题面需要他便学会了打炉石传说。但是传统的炉石传说对于刚入门的GG学长来说有点复杂，所以他决定自己开发一个简化版

transaction transaction transactionTime Limit: 4000/2000 MS (Java/Others)    Memory Limit: 132768/132768 K (Java/Others)Total Submission(s): 1244    Accepted Submission(s): 595Problem Desc

Flow ProblemTime Limit: 5000/5000 MS (Java/Others)    Memory Limit: 65535/32768 K (Java/Others)Total Submission(s): 17417    Accepted Submission(s): 8204Problem DescriptionNetwork flow

BarricadeTime Limit: 3000/1000 MS (Java/Others)    Memory Limit: 65536/65536 K (Java/Others)Total Submission(s): 1967    Accepted Submission(s): 570Problem DescriptionThe empire is und

EscapeTime Limit: 4000/2000 MS (Java/Others)    Memory Limit: 65536/65536 K (Java/Others)Total Submission(s): 11348    Accepted Submission(s): 2733Problem Description2012 If this is th

Drainage DitchesTime Limit: 2000/1000 MS (Java/Others)    Memory Limit: 65536/32768 K (Java/Others)Total Submission(s): 19338    Accepted Submission(s): 9234Problem DescriptionEvery ti

hhh,写板子专用题。。畅通工程续Time Limit: 3000/1000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 58019    Accepted Submission(s): 21811Problem Description

Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 4566    Accepted Submission(s): 1448Problem DescriptionFor a tree, which nodes and

DescriptionBessie's been appointed the new watch-cow for the farm. Every night, it's her job to walk across the farm and make sure that no evildoers are doing any evil. She begins at the barn, mak

PortalTime Limit: 2000/1000 MS (Java/Others)    Memory Limit: 65536/65536 K (Java/Others)Total Submission(s): 1737    Accepted Submission(s): 856Problem DescriptionZLGG found a magic t

Today is Ignatius' birthday. He invites a lot of friends. Now it's dinner time. Ignatius wants to know how many tables he needs at least. You have to notice that not all the friends know each other, a

上次Gardon的迷宫城堡小希玩了很久（见Problem B），现在她也想设计一个迷宫让Gardon来走。但是她设计迷宫的思路不一样，首先她认为所有的通道都应该是双向连通的，就是说如果有一个通道连通了房间A和B，那么既可以通过它从房间A走到房间B，也可以通过它从房间B走到房间A，为了提高难度，小希希望任意两个房间有且仅有一条路径可以相通（除非走了回头路）。小希现在把她的设计图给你，让你帮忙判断她的

Is It A Tree?Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 65536/32768 K (Java/Others)Total Submission(s): 25827    Accepted Submission(s): 5894Problem DescriptionA tree is a

More is betterTime Limit: 5000/1000 MS (Java/Others)    Memory Limit: 327680/102400 K (Java/Others)Total Submission(s): 29398    Accepted Submission(s): 10436Problem DescriptionMr Wang

Constructing RoadsTime Limit: 2000/1000 MS (Java/Others)    Memory Limit: 65536/32768 K (Java/Others)Total Submission(s): 24088    Accepted Submission(s): 9249Problem DescriptionThere

畅通工程Time Limit: 4000/2000 MS (Java/Others)    Memory Limit: 65536/32768 K (Java/Others)Total Submission(s): 56703    Accepted Submission(s): 30286Problem Description某省调查城镇交通状况，得到现有城镇道路

还是畅通工程Time Limit: 4000/2000 MS (Java/Others)    Memory Limit: 65536/32768 K (Java/Others)Total Submission(s): 48355    Accepted Submission(s): 22061Problem Description某省调查乡村交通状况，得到的统计表

畅通工程再续Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 30372    Accepted Submission(s): 9913Problem Description相信大家都听说一个“百岛湖”的地方吧

省政府“畅通工程”的目标是使全省任何两个村庄间都可以实现公路交通（但不一定有直接的公路相连，只要能间接通过公路可达即可）。现得到城镇道路统计表，表中列出了任意两城镇间修建道路的费用，以及该道路是否已经修通的状态。现请你编写程序，计算出全省畅通需要的最低成本。 Input测试输入包含若干测试用例。每个测试用例的第1行给出村庄数目N ( 1当N为0时输入结束。Output每个测

Problem DescriptionIn 2100, since the sea level rise, most of the cities disappear. Though some survived cities are still connected with others, but most of them become disconnected. The governmen

畅通工程Time Limit: 1000/1000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 31780    Accepted Submission(s): 14005Problem Description省政府“畅通工程”的目标是使全省任何两

Problem DescriptionEddy begins to like painting pictures recently ,he is sure of himself to become a painter.Every day Eddy draws pictures in his small room, and he usually puts out his newest pic

Problem DescriptionBenny has a spacious farm land to irrigate. The farm land is a rectangle, and is divided into a lot of samll squares. Water pipes are placed in these squares. Different square h

Problem DescriptionXX星有许多城市，城市之间通过一种奇怪的高速公路SARS(Super Air Roam Structure---超级空中漫游结构）进行交流，每条SARS都对行驶在上面的Flycar限制了固定的Speed，同时XX星人对 Flycar的“舒适度”有特殊要求，即乘坐过程中最高速度与最低速度的差越小乘坐越舒服 ,(理解为SARS的限速要求，flycar必须瞬

Hand in HandTime Limit: 2000/1000 MS (Java/Others)    Memory Limit: 122768/62768 K (Java/Others)Total Submission(s): 2402    Accepted Submission(s): 821Problem DescriptionIn order to g

一个人的旅行Time Limit: 1000/1000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 41287    Accepted Submission(s): 14035Problem Description虽然草儿是个路痴（就是在杭电待了一