链接:http://vjudge.net/problem/viewProblem.action?id=18806 描述:给出一堆珠子,每个珠子有两种颜色,有一端颜色相同的珠子可以串在一起,问是否可以把所有珠子串在一起,并求其中一种方案. 思路:欧拉回路 以颜色作为节点,以珠子作为边建图,无向图. 下面是我的实现: 1 #include <iostream> 2 #include <cstdio> 3 #include <cstring> 4 using namespac…

UVA10054 The Necklace 链接:http://acm.hust.edu.cn/vjudge/problem/viewProblem.action?id=18806 [思路] 欧拉回路. 把每一种颜色看作结点,每一个珠子看作边,构图后求欧拉回路即用所有的珠子构成一条项链. 需要注意的是ans的加入是逆序的,G记录的是边出现的次数. [代码] #include<cstdio> #include<queue> #include<vector> #includ…

2019-02-09-21:55:23 原题链接 题目描述: 给定一串珠子的颜色对,每颗珠子的两端分别有颜色(用1 - 50 之间的数字表示,对每颗珠子的颜色无特殊要求),若两颗珠子的连接处为同种颜色则可以相连, 当整串珠子都满足两两可以相连时则输出连接序列,否则输出some beads may be lost. 解题思路: 简单欧拉回路思维,注意判断该图是否可以构成欧拉回路. 算法描述及其实现: #include <bits/stdc++.h> using namespace std; +…

题目大意:有n个珠子,珠子两边的颜色已知,问能否连成一条项链.(两个珠子可以项链当且仅当一个珠子的一边颜色与另一个珠子的另一边颜色相同). 题目分析:欧拉回路.将颜色视作节点,珠子当做边,问题变成了找一条欧拉回路. 欧拉回路存在的条件:无向图:1.图连通:2.无奇点: 有向图:1.忽略边的方向后,图连通:2.每个点的入度都等于出度: 注意:输出回路的时候要逆序输出... 代码如下: # include<iostream> # include<cstdio> # include<…

应吴老师之邀,写了个数据生成器. 目前这个数据生成器可以保证生成的数据都是合法的,且效率也还不错.只是在建立普通连通图的时候zyy偷懒了,直接把所有点串起来从而保证图的连通.如果有大神有更好的方法请不吝指教,zyy不胜感谢~~ 下面是代码: 1 #include<cstdio> 2 #include<ctime> 3 #include<cstring> 4 #include<cstdlib> 5 #include<cmath> 6 #includ…

题目描述 输入格式 输出格式 题意简述 有一种由彩色珠子连接而成的项链.每个珠子的两半由不同颜色组成.如图所示,相邻两个珠子在接触的地方颜色相同.现在有一些零碎的珠子,需要确认它们是否可以复原成完整的项链. 输入格式: 输入第一行为测试数据组数 \(T\) .每组数据的第一行是一个整数\(N (5 ≤ N ≤ 1000 )\),表示珠子的个数.接下来的\(N\) 行每行包含两个整数,即珠子两半的颜色.颜色用\(1\)~\(50\)的整数来表示. 输出格式: 对于每组数据,输出测试数据编号和方案.…

[USACO1.1]坏掉的项链Broken Necklace 22892 破碎的项链 方法一:很容易想到枚举断点,再分别两头找,但是要注意很多细节 #include<iostream> #include<string> #include<cstdio> using namespace std; string s; int n,l,r,ll,rr,tmp,ans; inline int calc(int x) { ll=s[x],rr=s[x+1],l=x-1,r=x+2…

necklace 题目描述 可怜的dog最终还是难逃厄运,被迫于lxy签下城下之约.这时候lxy开始刁难dog. Lxy首先向dog炫耀起了自己的财富,他拿出了一段很长的项链.这个项链由n个珠子按顺序连在一起(1号珠子和n号珠子没有相连),每个珠子的颜色是1..m中的一种颜色(不妨用Ai表示第i个珠子的颜色). 可dog当然不肯服气,于是他认为一定可以找到一段长度<=len的项链b1..blen(bi也是1..m中的一种颜色),没有出现过. 出现过的定义就是存在一组C1..Cm满足0<C1&l…

代码 for(int i=0; i!=n; ++i) { int u = cin.nextInt(); int v = cin.nextInt(); edges.add(new Edge(u,v)); startpnt = u; if(g.get(u)==null) g.put(u, new ArrayList<Integer> ()); g.get(u).add(edges.size()-1); edges.add(new Edge(v,u)); if(g.get(v)==null) g.p…

Shell Necklace Time Limit: 16000/8000 MS (Java/Others)    Memory Limit: 65536/65536 K (Java/Others)Total Submission(s): 534    Accepted Submission(s): 227 Problem Description Perhaps the sea‘s definition of a shell is the pearl. However, in my view,…

Necklace/center> 题目连接: http://acm.hdu.edu.cn/showproblem.php?pid=5727 Description SJX has 2*N magic gems. N of them have Yin energy inside while others have Yang energy. SJX wants to make a necklace with these magic gems for his beloved BHB. To avoid…

[BZOJ1789][BZOJ1830][Ahoi2008]Necklace Y型项链 试题描述 欢乐岛上众多新奇的游乐项目让小可可他们玩的非常开心.现在他们正在玩比赛串项链的游戏,谁串的最快就能得到优厚的奖品.这可不是普通的项链,而是一种Y型项链,项链的最中间有一颗大珍珠作为结合点,从大珍珠上连出来3条由各种宝石串起来的链子.比赛的规则是这样的:每次可以从三条链子中某一条的一端取下来一个宝石,或者安上去一个宝石,称为一次操作,经过若干次操作,最终使得三条链子完全相同.想要赢得比赛,那么只能使用…

ZeptoLab Code Rush 2015 D. Om Nom and Necklace [题意] 给出一个字符串s,判断其各个前缀是否是 ABABA…ABA的形式(A和B都可以为空,且A有Q+1个,B有Q个,Q给定). [官方题解] 对于前缀P,我们可以把它拆成P=SSSS…SSSST,其中T是S的前缀.显然可以用KMP算法,时间复杂度是O(n). 当T=S:P=SSS…S.假设S出现了R次.如果转换为ABABAB…ABABA的形式,A和B是由几个S组成,而且最后的A一定是P的一个后缀.由…

Mery has a beautiful necklace. The necklace is made up of N magic balls. Each ball has a beautiful value. The balls with the same beautiful value look the same, so if two or more balls have the same beautiful value, we just count it once. We define t…

Necklace of Beads Time Limit: 1000MS   Memory Limit: 10000K Total Submissions: 7451   Accepted: 3102 Description Beads of red, blue or green colors are connected together into a circular necklace of n beads ( n < 24 ). If the repetitions that are pro…

1789: [Ahoi2008]Necklace Y型项链 Time Limit: 1 Sec  Memory Limit: 64 MBSubmit: 421  Solved: 258[Submit][Status][Discuss] Description 欢乐岛上众多新奇的游乐项目让小可可他们玩的非常开心.现在他们正在玩比赛串项链的游戏,谁串的最快就能得到优厚的奖品.这可不是普通的项链,而是一种Y型项链,项链的最中间有一颗大珍珠作为结合点,从大珍珠上连出来3条由各种宝石串起来的链子.比赛的规…

Necklace Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 327680/327680 K (Java/Others)Total Submission(s): 709    Accepted Submission(s): 245 Problem Description One day , Partychen gets several beads , he wants to make these beads a necklace…

题目连接:http://acm.hdu.edu.cn/showproblem.php?pid=3874 Necklace Time Limit: 15000/5000 MS (Java/Others)    Memory Limit: 65536/32768 K (Java/Others)Total Submission(s): 3929    Accepted Submission(s): 1296 Problem Description Mery has a beautiful neckla…

Problem UVA10054-The Necklace Time Limit: 3000 mSec Problem Description Input The input contains T test cases. The first line of the input contains the integer T. The first line of each test case contains an integer N (5 ≤ N ≤ 1000) giving the number o…

My little sister had a beautiful necklace made of colorful beads. Two successive beads in the necklace shared a common color at their meeting point. The figure below shows a segment of the necklace: But, alas! One day, the necklace was torn and the b…

题目链接:http://acm.split.hdu.edu.cn/showproblem.php?pid=5727 Problem DescriptionSJX has 2*N magic gems. N of them have Yin energy inside while others have Yang energy. SJX wants to make a necklace with these magic gems for his beloved BHB. To avoid maki…

题目链接:http://acm.hdu.edu.cn/showproblem.php?pid=3091 Time Limit: 2000/1000 MS (Java/Others) Memory Limit: 327680/327680 K (Java/Others) Problem Description One day , Partychen gets several beads , he wants to make these beads a necklace . But not ever…

题目链接:Necklace 题意: 给出一串珠子,每个珠子有它的value,现在给出n(n<=5e4)个珠子的value(1<=value<=1e6),现在给出m(1<=m<=2e5)个询问,每个询问给出l和r,要求[l,r]区间内所有珠子的value(如果有相同value值的珠子则只计算一次这个珠子的值). 题解: 刚开始看到这题,遇到区间求和就想到了树状数组.但是如何解决区间内相同value值只能计算一次的问题呢?看了题解后发现可以用离线化解决这个问题,我们可以先把所有的…

[HDU5730]Shell Necklace(多项式运算,分治FFT) 题面 Vjudge 翻译: 有一个长度为\(n\)的序列 已知给连续的长度为\(i\)的序列装饰的方案数为\(a[i]\) 求将\(n\)个位置全部装饰的总方案数. 答案\(mod\ 313\) 题解 很明显,是要求: \(f[n]=\sum_{i=0}^na[i]\times f[n-i],f[0]=0\) 卷积的形式啊.. 然后就可以开始搞了 忍不住的方法一 好明显啊,把生成函数\(F,A\)给搞出来 然后就有\(F*…

4423: Necklace 题目连接: http://acm.scu.edu.cn/soj/problem.action?id=4423 Description baihacker bought a necklace for his wife on their wedding anniversary. A necklace with N pearls can be treated as a circle with N points where the distance between any…

1789: [Ahoi2008]Necklace Y型项链 Time Limit: 20 Sec  Memory Limit: 256 MB 题目连接 http://www.lydsy.com/JudgeOnline/problem.php?id=1789 Description 欢乐岛上众多新奇的游乐项目让小可可他们玩的非常开心.现在他们正在玩比赛串项链的游戏,谁串的最快就能得到优厚的奖品.这可不是普通的项链,而是一种Y 型项链,项链的最中间有一颗大珍珠作为结合点,从大珍珠上连出来3条由各种宝…

Necklace of Beads Time Limit: 3000/1000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 630    Accepted Submission(s): 232 Problem Description Beads of red, blue or green colors are connected together into a circular…

Ivan wants to make a necklace as a present to his beloved girl. A necklace is a cyclic sequence of beads of different colors. Ivan says that necklace is beautiful relative to the cut point between two adjacent beads, if the chain of beads remaining a…

C. Necklace 题目连接: http://www.codeforces.com/contest/613/problem/C Description Ivan wants to make a necklace as a present to his beloved girl. A necklace is a cyclic sequence of beads of different colors. Ivan says that necklace is beautiful relative…

Description Perhaps the sea‘s definition of a shell is the pearl. However, in my view, a shell necklace with n beautiful shells contains the most sincere feeling for my best lover Arrietty, but even that is not enough. Suppose the shell necklace is a…