题意:给定一张n点n边无重边自环的无向图,刚开始每条边都没有被选择,每条边上有一个颜色集合,必须从中选择一种 有K个工人,每个工人有颜色a[i],需要把工人分配到与其颜色相同的边上 问是否能有一种使得n个点完全联通的方案,如果有则输出 n,K<=2000 思路:考虑n-1条边的树的弱化版,显然每条边都应该被选择,用颜色和边建图跑最大流即可 n点n边的基环树的情况下需要把环抠出来,设环的大小为size,两个端点至少有一个在环中的为A集合,其余为B集合 显然B集合中所有的边都需要被选取,A集合中至多…

Road Construction Time Limit:2000MS    Memory Limit:65536KB    64bit IO Format:%I64d & %I64u SubmitStatus Description It's almost summer time, and that means that it's almost summer construction time! This year, the good people who are in charge of t…

P3352 Road Construction 描述 这几乎是夏季,这意味着它几乎是夏季施工时间!今年,负责岛屿热带岛屿天堂道路的优秀人士,希望修复和升级岛上各个旅游景点之间的各种道路. 道路本身也很有趣.由于岛上奇特的风俗习惯,道路的布置使得它们不会在十字路口相遇,而是通过桥梁和隧道在彼此之间穿过或穿过.这样,每条道路都在两个特定的旅游景点之间运行,这样游客不会失去不可挽回的收入. 不幸的是,鉴于每条道路上所需的维修和升级的性质,当建筑公司在特定的道路上工作时,它在任何方向都不可用.如果不能在…

[POJ3352]Road Construction 试题描述 It's almost summer time, and that means that it's almost summer construction time! This year, the good people who are in charge of the roads on the tropical island paradise of Remote Island would like to repair and upg…

                                                                                                                                             Road Construction Time Limit: 2000MS   Memory Limit: 65536K Total Submissions: 11210   Accepted: 5572 Descrip…

Road Construction Time Limit: 2000MS   Memory Limit: 65536K Total Submissions: 10141   Accepted: 5031 Description It's almost summer time, and that means that it's almost summer construction time! This year, the good people who are in charge of the r…

POJ 3177 Redundant Paths POJ 3352 Road Construction 题目链接 题意:两题一样的.一份代码能交.给定一个连通无向图,问加几条边能使得图变成一个双连通图 思路:先求双连通.缩点后.计算入度为1的个数,然后(个数 + 1) / 2 就是答案(这题因为是仅仅有一个连通块所以能够这么搞,假设有多个,就不能这样搞了) 代码: #include <cstdio> #include <cstring> #include <algorithm…

  1791: [Ioi2008]Island 岛屿  Time Limit: 20 Sec  Memory Limit: 162 MB Submit: 908  Solved: 159 [Submit][id=1791" target="_blank">Status] Description 你将要游览一个有N个岛屿的公园.从每个岛i出发,仅仅建造一座桥.桥的长度以Li表示.公园内总共同拥有N座桥. 虽然每座桥由一个岛连到还有一个岛.但每座桥均能够双向行走.同一…

Road Construction Description It's almost summer time, and that means that it's almost summer construction time! This year, the good people who are in charge of the roads on the tropical island paradise of Remote Island would like to repair and upgra…

Road Construction Time Limit: 2000MS   Memory Limit: 65536K Total Submissions: 12532   Accepted: 6309 Description It's almost summer time, and that means that it's almost summer construction time! This year, the good people who are in charge of the r…