Eight Time Limit: 10000/5000 MS (Java/Others)    Memory Limit: 65536/32768 K (Java/Others)Total Submission(s): 11226    Accepted Submission(s): 3013Special Judge Problem Description The 15-puzzle has been around for over 100 years; even if you don't…

Eight POJ - 1077 HDU - 1043 八数码问题.用hash(康托展开)判重 bfs(TLE) #include<cstdio> #include<iostream> #include<queue> #include<cstring> using namespace std; ,,,,,,,,,}; ]; ][]; queue<int> q; //data[][9]存储上一个状态,data[][10]存储到这个状态的操作,dat…

在学习八数码A*搜索问题的时候须要知道下面几个点: Hash:利用康托展开进行hash 康托展开主要就是依据一个序列求这个序列是第几大的序列. A*搜索:这里的启示函数就用两点之间的曼哈顿距离进行计算就能够. 减枝:在八数码里.随意交换一个空行和一个位置的数字,这个八数码的逆序数是不变的,这样就能够依据眼下状态推断是否可达终点状态了. 第一次做这个题用的map进行哈希,结果果断超时.之后又写了LRJ书上的hash方法也超时了,最后仅仅能用康托展开了 具体请參考:[八数码的八重境地] http:/…

看了这篇博客的讲解,挺不错的.http://www.cnblogs.com/goodness/archive/2010/05/04/1727141.html 判断无解的情况(写完七种境界才发现有直接判断无解的方法): 一个状态表示成一维的形式,求出除0之外所有数字的逆序数之和,也就是每个数字前面比它大的数字的个数的和,称为这个状态的逆序. 若两个状态的逆序奇偶性相同,则可相互到达,否则不可相互到达. POJ提交记录(从下往上依次为第1,2,3,4,5,6,7,8境界): HDU提交记录(从下往上…

一.思路很简单,搜索.对于每一种状态,利用康托展开编码成一个整数.于是,状态就可以记忆了. 二.在搜索之前,可以先做个优化,对于逆序数为奇数的序列,一定无解. 三.搜索方法有很多. 1.最普通的:深搜.广搜.在这题里面,这两个方法直接TLE.所以,我后面没有贴超时的代码. 2.既然1超时,那就预处理出所有状态,用map存储,然而,map的insert(使用[]是一样的)实在太慢了,也超时. 3.在1的基础上,优化一下,得到:IDA*,双向广搜,A*. 3.IDA*我没尝试,不过感觉没有A*快.另…

Eight Time Limit: 10000/5000 MS (Java/Others)    Memory Limit: 65536/32768 K (Java/Others)Total Submission(s): 10101    Accepted Submission(s): 2684Special Judge Problem Description The 15-puzzle has been around for over 100 years; even if you don't…

Eight Time Limit: 10000/5000 MS (Java/Others)    Memory Limit: 65536/32768 K (Java/Others)Total Submission(s): 10778    Accepted Submission(s): 2873Special Judge Problem Description The 15-puzzle has been around for over 100 years; even if you don't…

C++ 八数码问题宽搜 题目描述 样例输入 (none) 样例输出 H--F--A AC代码 #include <iostream> #include <stdio.h> #include <string> using namespace std; int ju[9][9] = {{0,0,0,0,0,0,0,0,0}, {0,1,0,0,0,1,0,1,1}, {0,0,1,1,1,1,0,1,1}, {0,0,1,1,0,0,1,1,1}, {0,0,1,0,1,1…

Eight Time Limit: 10000/5000 MS (Java/Others)    Memory Limit: 65536/32768 K (Java/Others) Total Submission(s): 14380    Accepted Submission(s): 4044 Special Judge Problem Description The 15-puzzle has been around for over 100 years; even if you don'…

题目链接:http://acm.hdu.edu.cn/showproblem.php?pid=1043 The 15-puzzle has been around for over 100 years; even if you don't know it by that name, you've seen it. It is constructed with 15 sliding tiles, each with a number from 1 to 15 on it, and all pack…