每个城市有4个城门,每个城门会发出唯一一条边去别的城市的城门.问你能否从城市1出发,经过每个城门恰好一次,再回到城市1. 每个城市的度数都是4,必然存在欧拉回路(如果连通).欧拉回路显然是一个合法解. #include<cstdio> #include<vector> using namespace std; struct Edge{ int id,v; }; vector<Edge>G[1010]; int n,sz,path[2010]; bool vis[2010…

2009-2010 ACM-ICPC, NEERC, Western Subregional Contest 排名 A B C D E F G H I J K L X 1 0 1 1 1 0 1 X 0 X 1 Problem C. Courier's Route 每个城市的度都为偶数,所以满足欧拉回路的条件,因此当n个城市都联通时,肯定有解.所以只需对每个城市进行欧拉, 输出路径的时候,枚举一下城市a和b之间哪个城市是有联系的即可. Problem D. Dales and Hills 求峰顶…

持久化对象 Kibana中可以查询到很多保存的对象,他们都存储在es中一个叫做.kibana的索引中. 搜索 存储在type为search中; 图表 存储在type为visualization中: 仪表板 存储在type为dashboard中: 每个plugins下的tab页都有一个对应的savedObject对象,比如 检索页对应的是savedSearch对象(discover/saved_searches/_saved_search.js) 图表页对应的是savedVisualization…

原题链接:http://codeforces.com/gym/100431/attachments/download/2421/20092010-winter-petrozavodsk-camp-andrew-stankevich-contest-37-asc-37-en.pdf 题意 给你一个n,让你构造一个环,使得相邻的节点的颜色不一样,问最多能使用多少颜色,并且输出染色方案. 题解 首先,我们来考察对于k个颜色,我们至少需要多少节点.每个点可以连接两个点,将边考虑为有向边,如果我们不浪费任…

Problem King's Inspection 题目大意 给一张n个点m条边的无向图,问是否存在一条欧拉回路. n<=10^5, 0<=m<=n+20. 解题分析 注意到数据范围m<=n+20,可以想象若存在一条欧拉回路,那么图的形状必定是一条长链再加上20条边. 将连续的一段入度和出度均为0的点缩成一个点,之后暴力跑欧拉回路就行了. 参考程序 #include <map> #include <set> #include <stack> #i…

Door Man Time Limit: 1000MS Memory Limit: 10000K Total Submissions: 2476 Accepted: 1001 Description You are a butler in a large mansion. This mansion has so many rooms that they are merely referred to by number (room 0, 1, 2, 3, etc-). Your master is…

1137. Bus Routes Time limit: 1.0 secondMemory limit: 64 MB Several bus routes were in the city of Fishburg. None of the routes shared the same section of road, though common stops and intersections were possible. Fishburg old residents stated that it…

题目链接:http://poj.org/problem?id=1300 You are a butler in a large mansion. This mansion has so many rooms that they are merely referred to by number (room 0, 1, 2, 3, etc...). Your master is a particularly absent-minded lout and continually leaves door…

Problem H. Hiking in the Hills 题目连接: http://codeforces.com/gym/100531/attachments Description Helen is hiking with her friends in a highland. Their plan is to hike from their camp A to a beautiful showplace B. Unfortunately, Helen started feeling diz…

转自:http://blog.csdn.net/shahdza/article/details/7779385 欧拉回路[HDU]1878 欧拉回路 判断3018 Ant Trip 一笔画问题1116 Play on Words2894 DeBruijin 兹鼓欧拉回路1956 Sightseeing tour 混合欧拉3472 HS BDC 混合欧拉=========================================================================…