显然每种颜色的花是独立的,可以分别求出答案后取$\max$ 对于某种颜色$C$,建立一张二分图,左右分别为$n$行$n$列,且第$i$行和第$j$列有边当且仅当$c_{i,j}=C$ 此时,问题即对边染色,并要求相同颜色的边没有公共端点,并最少化颜色数(包含初始颜色) 这是二分图的边着色问题,其答案即二分图中所有点度数的最大值(记为$\Delta$) 显然这些颜色是必要的(即不能更少),下面构造来说明这是足够的-- 做法1: 依次对边染色(顺序任意),若当前边存在某种剩余的颜色即使用,否则总存在…

10798 - Be wary of Roses You've always been proud of your prize rose garden. However, some jealous fellow gardeners will stop at nothing to gain an edge over you. They have kidnapped, blindfolded, and handcuffed you, and dumped you right in the middl…

You know — one loves the sunset, when one is so sad... 你知道的—当一个人情绪低落的时候,他会格外喜欢看日落...... If someone loves a flower, of which just one single blossom grows in all the millions and millions of stars, it is enough to make him happy just to look at the st…

题目 Source http://acm.hdu.edu.cn/showproblem.php?pid=5977 Description When God made the first man, he put him on a beautiful garden, the Garden of Eden. Here Adam lived with all animals. God gave Adam eternal life. But Adam was lonely in the garden, s…

题目链接: Garden of Eden Time Limit: 10000/5000 MS (Java/Others)    Memory Limit: 131072/131072 K (Java/Others)Total Submission(s): 210    Accepted Submission(s): 75 Problem Description When God made the first man, he put him on a beautiful garden, the G…

nginx+iis实现负载均衡 在win2008R2上使用(NLB)网络负载均衡 NLB网路负载均衡管理器详解 [译文]Web Farm和Web Garden的区别? IIS负载均衡-Application Request Route详解第一篇: ARR介绍 IIS负载均衡-Application Request Route详解第四篇:使用ARR实现三层部署架构…

Cellular automata are mathematical idealizations of physical systems in which both space and time are discrete, and the physical quantities take on a nite set of discrete values. A cellular automaton consists of a lattice (or array), usually in nite,…

Content: Class1 My name is Prince Class2 Welcome to our hotel Class3 We’re not afraid of problems Class4 Doing a job that you like Class5 We should take good care of our eyes Class6 A dog is man's best friend Class7 Knowledge is power Class8 Importan…

Pashmak and Garden Codeforces Round #261 (Div. 2) A. Pashmak and Garden time limit per test 1 second memory limit per test 256 megabytes input standard input output standard output Pashmak has fallen in love with an attractive girl called Parmida sin…

Problem G. Garden Gathering Input file: standard input Output file: standard output Time limit: 3 seconds Memory limit: 512 megabytes Many of you may have been to St. Petersburg, but have you visited Peterhof Palace? It is a collection of splendid pa…