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…

经典好题,自己不知道哪里错了交上去是RE,可能是数组开的不好吧,字典树老碰到这种问题.. 先马上别人的代码,有空对拍看看 #include <cstdio> #include <cstring> ; int fa[MAX], d[MAX], cnt; struct Trie { ]; int jud[MAX]; Trie() { sz = ; memset(t[], -, sizeof(t)); jud[] = ; } void clear() { sz = ; memset(t[…

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…

dfs水过: /* Name: NYOJ--42--一笔画问题 Author: shen_渊 Date: 18/04/17 15:22 Description: 这个题用并查集做,更好.在练搜索,试试手 本来用的vector存放边,结果,vector并不能当做数组,遍历的时候只能用迭代器 中间没有数据的部分读取会出错 输入 第一行只有一个正整数N(N<=10)表示测试数据的组数. 每组测试数据的第一行有两个正整数P,Q(P<=1000,Q<=2000),分别表示这个画中有多少个顶点和多少…

[题目链接] http://www.lydsy.com/JudgeOnline/problem.php?id=1116 [题目大意] Byteotia城市有n个towns,m条双向roads.每条road连接两个不同的towns, 没有重复的road.你要把其中一些road变成单向边使得:每个town都有且只有一个入度 [题解] 我们发现当一个连通块边数大于等于其点数的时候就满足条件, 那么此题如果出现边数少于点数的连通块就不成立, 用并查集能够完成判断. [代码] #include <cstd…

Junk-Mail Filter Time Limit: 15000/8000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 7515    Accepted Submission(s): 2368 Problem Description Recognizing junk mails is a tough task. The method used here consists o…

下面两个写得很清楚了,就不在赘述. http://blog.sina.com.cn/s/blog_5cd4cccf0100apd1.htmlhttp://www.cnblogs.com/lyy289065406/archive/2011/07/30/2122265.html 我这里没用trie来表示颜色种类,而是用数组对颜色离散化,之后就差不多一样了,用并查集判断是否连通,再判断奇顶点的个数是否为0个或2个. 这题我开始大意了,刚开始就只判断奇数度的节点个数是否为0或2,没有考虑判断图的连通性.…

题意:给出很多很多很多很多个棒子 左右各有颜色(给出的是单词) 相同颜色的可以接在一起,问是否存在一种 方法可以使得所以棒子连在一起 思路:就是一个判欧拉通路的题目,欧拉通路存在:没奇度顶点   或者只有2个奇度顶点 同时要连通   .关键在于给颜色hash和 判断连通性   hash用字典树  连通用并查集 #include<cstdio> #include<iostream> #include<cstring> using namespace std; +; str…

Play on Words HDU - 1116 Some of the secret doors contain a very interesting word puzzle. The team of archaeologists has to solve it to open that doors. Because there is no other way to open the doors, the puzzle is very important for us. There is a…

Fibonacci Tree Time Limit: 4000/2000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 2915    Accepted Submission(s): 931 Problem Description Coach Pang is interested in Fibonacci numbers while Uncle Yang wants him to…