Time Limit: 5000MS   Memory Limit: 128000K Total Submissions: 37340   Accepted: 9796 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 straight line suc…

题目大意: 给定一些木棒,木棒两端都涂上颜色,求是否能将木棒首尾相接,连成一条直线,要求不同木棒相连接的一端必须是同颜色的. 解题思路: 可以用图论中欧拉路的知识来解这道题,首先可以把木棒两端看成节点,把木棒看成边,这样相同的颜色就是同一个节点 问题便转化为:给定一个图,是否存在“一笔画”经过涂中每一点,每条边一次. 这样就是求图中是否存在欧拉路Euler-Path. 关于度数的判断方法: 节点的度用颜色出现次数来统计,如样例中,蓝色blue出现三次(不管是出度还是入度),那么blue结点的度就…

题意: 就是无向图欧拉路 解析: 不能用map..超时 在判断是否只有一个联通的时候,我比较喜欢用set,但也不能用set,会超时,反正不能用stl emm 用trie树来编号就好了 #include <iostream> #include <cstdio> #include <sstream> #include <cstring> #include <map> #include <cctype> #include <set&g…

原题:http://acm.fzu.edu.cn/problem.php?pid=2112 首先是,票上没有提到的点是不需要去的. 然后我们先考虑这个图有几个连通分量,我们可以用一个并查集来维护,假设有n个连通分量,我们就需要n-1条边把他们连起来. 最后对于每个联通分量来说,我们要使它能一次走完,就是要求他是否满足欧拉通路,也就是这个联通分量中至多有2个度为奇数的点,每多出2个度为奇数的点,就多需要一条边(因为单个连通分量的所有点的度数之和为偶数,所以不可能存在奇数个奇数度数的点). #inc…

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 straight line such that the colors of the endpoints that touch are of the same color? Input Input is a…

先把问题放在后缀数组上考虑 已知两个数组a b,求min(a[i],...,a[j])+(b[i]^b[j])的最大值 套路题 初始每个点都是一个小连通块 把a按从大到小的顺序加入,计算当前加入边作为min的贡献: 每次加入会把两个连通块联通,答案就是两边连通块各出一个数能得到的异或和最大值 我:这不是线性基吗 miaom:mdzz,只能有两个数 我:蛤,好难啊,怎么做啊 miaom:Trie啊 我:哦 没了 #include <bits/stdc++.h> #define N 500001…

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…

Time Limit: 5000MS   Memory Limit: 128000K Total Submissions: 27704   Accepted: 7336 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 straight line suc…

Colored Sticks DescriptionYou 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 straight line such that the colors of the endpoints that touch are of the same color?Inp…

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…