题目大意:给定一捆木棒,每根木棒的每个端点涂有某种颜色.问:是否能将这些棒子首位项链,排成一条直线,且相邻两根棍子的连接处的颜色一样. 解题思路:此题是一道典型的判断欧拉回路或欧拉通路的问题,以木棍的端点颜色为顶点.方法是:先用并查集判断图是否连通,然后统计奇度顶点的个数sumj , 如果 sumj == 0 , 则图中存在欧拉回路 :如果 sumj == 2  , 则图中存在欧拉通路 : 如果 sumj > 2 ,则图中不存在欧拉通路.但是此题的关键是如何给端点颜色编号,一开始,我用map映射…

题目链接:poj 2513 Colored Sticks 题目大意:有N个木棍,每根木棍两端被涂上颜色.如今给定每一个木棍两端的颜色.不同木棍之间拼接须要颜色同样的 端才干够.问最后是否能将N个木棍拼接在一起. 解题思路:欧拉通路+并查集+字典树. 欧拉通路,每一个节点的统计度,度为奇数的点不能超过2个.并查集,推断节点 是否全然联通. 字典树,映射颜色. #include <cstdio> #include <cstring> #include <string> #i…

主题链接: http://poj.org/problem? id=2513 Colored Sticks Time Limit: 5000MS   Memory Limit: 128000K Total Submissions: 30955   Accepted: 8159 Description You are given a bunch of wooden sticks. Each endpoint of each stick is colored with some color. Is i…

点击打开链接 Colored Sticks Time Limit: 5000MS   Memory Limit: 128000K Total Submissions: 27955   Accepted: 7403 Description You are given a bunch of wooden sticks. Each endpoint of each stick is colored with some color. Is it possible to align the sticks…

Colored Sticks Time Limit: 5000MS   Memory Limit: 128000K Total Submissions: 28036   Accepted: 7428 Description You are given a bunch of wooden sticks. Each endpoint of each stick is colored with some color. Is it possible to align the sticks in a st…

链接:poj 2513 题意:给定一些木棒.木棒两端都涂上颜色,不同木棒相接的一边必须是 同样的颜色.求能否将木棒首尾相接.连成一条直线. 分析:能够用欧拉路的思想来解,将木棒的每一端都看成一个结点 由图论知识能够知道,无向图存在欧拉路的充要条件为: ①     图是连通的. ②     全部节点的度为偶数,或者有且仅仅有两个度为奇数的结点. 图的连通性能够用并查集,由于数据比較大,所以用并查集时要压缩路径, 全部节点的度(入度和出度的和)用数组记录就好 可是25w个木棒,有50w个结点,要怎么…

Colored Sticks Time Limit: 5000MS   Memory Limit: 128000K Total Submissions: 27097   Accepted: 7175 Description You are given a bunch of wooden sticks. Each endpoint of each stick is colored with some color. Is it possible to align the sticks in a st…

Colored Sticks Time Limit: 5000MS   Memory Limit: 128000K Total Submissions: 40043   Accepted: 10406 Description You are given a bunch of wooden sticks. Each endpoint of each stick is colored with some color. Is it possible to align the sticks in a s…

题目链接: http://poj.org/problem?id=2513 http://bailian.openjudge.cn/practice/2513?lang=en_US Time Limit: 5000MS Memory Limit: 128000K Description You are given a bunch of wooden sticks. Each endpoint of each stick is colored with some color. Is it possi…

题目:http://poj.org/problem?id=2513 参考博客:http://blog.csdn.net/lyy289065406/article/details/6647445 http://www.cnblogs.com/LK1994/p/3263462.html #include <iostream> #include<cstdio> #include<cstring> #include<cstdlib> #include<stac…